CN114548141A - Method, apparatus, electronic device and readable storage medium for generating waveform file - Google Patents

Abstract

The application relates to the technical field of electronics, and provides a method, a device, electronic equipment and a readable storage medium for generating a waveform file, wherein the electronic equipment can be a mobile phone, a tablet computer, wearable equipment, vehicle-mounted equipment and the like, and the method comprises the following steps: acquiring an initial resonant frequency and a current resonant frequency of a motor; when the initial resonant frequency is different from the current resonant frequency, determining a third voltage amplitude according to a first voltage amplitude and a second voltage amplitude, wherein the first voltage amplitude and the second voltage amplitude are amplitudes of two adjacent sampling points of the alternating current driving signal corresponding to the initial resonant frequency; and generating a current waveform file according to the third voltage amplitude, wherein the current waveform file is used for generating the alternating current driving signal corresponding to the current resonance frequency, and the third voltage amplitude is the amplitude of one sampling point of the alternating current driving signal corresponding to the current resonance frequency. The above method can reduce cost.

Description

Method, apparatus, electronic device and readable storage medium for generating waveform file

technical field

The present application relates to the field of electronic technologies, and in particular, to a method, apparatus, electronic device and readable storage medium for generating a waveform file.

Background technique

As a common device, linear motors are widely used in people's work and life. For example, in the process of using mobile phones, the vibration of mobile phones is realized by linear motors.

Usually with the use of a linear motor, the resonant frequency may shift. In order to ensure the vibration effect of the motor, it is often necessary to calibrate the resonant frequency of the linear motor. At present, people often use the hardware feedback detection method to realize the calibration of the linear motor, that is, adding a feedback circuit in the circuit to realize the calibration of the resonant frequency of the linear motor.

However, the traditional way of calibrating the resonant frequency of the motor by means of hardware feedback detection is expensive due to the additional circuit.

SUMMARY OF THE INVENTION

The present application provides a method for generating a waveform file, which can reduce costs.

In a first aspect, a method for generating a wave file is provided, including:

Get the initial resonant frequency and current resonant frequency of the motor;

When the initial resonance frequency is different from the current resonance frequency, a third voltage amplitude is determined according to the first voltage amplitude and the second voltage amplitude, and the first voltage amplitude and the second voltage amplitude are The amplitudes of two adjacent sampling points of the AC drive signal corresponding to the initial resonant frequency, wherein the phase corresponding to the third voltage amplitude is greater than the phase corresponding to the first voltage amplitude and smaller than the second voltage amplitude The phase corresponding to the voltage amplitude, the difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the first voltage amplitude is the first phase difference, and the phase corresponding to the third voltage amplitude is the same as the first phase difference. The difference between the phases corresponding to the two voltage amplitudes is the second phase difference, the third voltage amplitude is positively correlated with the sum of the first value and the second value, and the first value is the first voltage amplitude and the first value. The product of weighting coefficients, the second value is the product of the second voltage amplitude and the second weighting coefficient, and the first weighting coefficient is the second phase difference divided by the first phase difference and the The value obtained by the sum of the second phase differences, the second weight coefficient is the value obtained by dividing the first phase difference by the sum of the first phase difference and the second phase difference;

A current waveform file is generated according to the third voltage amplitude, wherein the current waveform file is used to generate an AC drive signal corresponding to the current resonance frequency, and the third voltage amplitude is an AC drive signal corresponding to the current resonance frequency The amplitude of one sample point of the drive signal.

The above-mentioned initial resonance frequency is the frequency of the preset initial waveform file. The voltage data of two adjacent sampling points of the AC drive signal corresponding to the initial resonance frequency are taken as the first voltage amplitude N _index and the second voltage amplitude N _index+1 , wherein the sampling time of the first voltage amplitude is at the second Before the voltage amplitude, that is, the phase corresponding to the first voltage amplitude is smaller than the phase corresponding to the second voltage amplitude. The ratio of the current resonance frequency to the initial resonance frequency is taken as the first proportional coefficient, namely Vision ₁ =F ₀ /F, where F ₀ is the current resonance frequency and F is the initial resonance frequency. The phase at a sampling point in the initial waveform file can be multiplied by the first scale factor to obtain the phase of a corresponding sampling point in the current waveform file. If the phase of each sampling point interval is taken as a time unit, then The magnitude of the phase difference between the phase of the sampling point in the current waveform file and the phase at this sampling point in the corresponding initial waveform file can be determined by multiplying the fraction of the product of the first proportional coefficient according to the number of the sampling point plus one. Partial representation, ie a=(index+1)×Vision ₁ −ROUNDDOWN(index+1)×Vision ₁ . Since the phase at each sampling point is taken as a time unit, a is a normalized value. In the case of aligning the starting points of the current waveform file and the initial waveform file, a can be used to represent the first time on the time axis. The distance between the three voltage amplitudes and the first voltage amplitude. The phase difference between the phase of this sampling point in the current waveform file and the phase at the next sampling point in the corresponding initial waveform file, then b=1-a can be used to represent the distance between the third voltage amplitude and the second voltage amplitude . Through the first weighting coefficient and the second weighting coefficient, the first voltage amplitude and the second voltage amplitude can be weighted according to the distance between the third voltage amplitude and the first voltage amplitude and the second voltage amplitude, to obtain The third voltage amplitude.

In this embodiment, the electronic device can weight the first voltage amplitude and the second voltage amplitude according to the distance between the third voltage amplitude and the first voltage amplitude and the second voltage amplitude, and obtain a reasonable and accurate The third voltage amplitude. Therefore, based on the current waveform file generated by the third voltage amplitude, it is possible to convert the initial waveform file of the initial resonant frequency into the current waveform file of the current resonant frequency, thereby generating an AC drive signal to drive the motor. The motor is calibrated by means of a circuit, and the frequency of the motor is adjusted by adding a feedback circuit, thus saving costs. At the same time, since the method does not increase the feedback circuit, the requirements for hardware are lower, and the application scenarios are more extensive.

Optionally, when the current resonance frequency is less than the initial resonance frequency, the generating the current waveform file according to the third voltage amplitude includes:

obtaining a first data quantity, where the first data quantity is the number of voltage data belonging to one AC drive signal cycle in an initial waveform file, and the initial waveform file is a waveform file corresponding to the initial resonant frequency;

The second data quantity is determined according to the first data quantity and the first transformation coefficient, where the first transformation coefficient is the ratio of the current resonant frequency to the initial resonant frequency, and the initial resonant frequency is the corresponding value of the initial waveform file the frequency of the AC drive signal, and the second data quantity is a value obtained by rounding the product of the first data quantity and the first transform coefficient;

obtaining a first cycle number, where the first cycle number is the number of cycles of the AC drive signal corresponding to the initial waveform file;

The second cycle number is determined according to the first cycle number and the second transformation coefficient, where the second cycle number is a value obtained by rounding the product of the first cycle number and the second transformation coefficient, so The second transformation coefficient is the ratio of the initial resonance frequency to the current resonance frequency;

The current waveform file is generated according to the second data quantity, the second period quantity and the third voltage amplitude, where the second data quantity is the voltage belonging to one AC drive signal period in the current waveform file The number of data, the second number of cycles is the number of cycles corresponding to the voltage data contained in the current waveform file.

The electronic device divides the number of voltage data in the initial waveform file Point _SUM by the number of cycles of the AC drive signal corresponding to the initial waveform file, that is, divided by the first cycle number T, as the initial waveform file belongs to one AC drive signal cycle The number of voltage data. The electronic device uses the ratio of the initial resonant frequency F to the current resonant frequency F ₀ as the first transformation coefficient, and rounds the product of the first data quantity and the first transformation coefficient as the second data quantity, that is, the second data quantity T _1point is a pair of A value obtained by rounding T _point ×(F/F ₀ ). Wherein, the second data quantity is the quantity of voltage data belonging to one AC drive signal cycle in the current waveform file. The electronic device takes the ratio of the current resonant frequency F ₀ to the initial resonant frequency F as the second transformation coefficient, and takes the value obtained by rounding the product of the second transformation coefficient and the first cycle number as the second cycle number, that is, the second cycle number. The number of cycles T ₁ =ROUNDDOWN(T×(F ₀ /F)). The second number of cycles is the number of cycles corresponding to the voltage data contained in the current waveform file. The electronic device determines the number of voltage data NewPoint _SUM required by the current waveform file according to the second data quantity T _1point and the second period quantity T ₁ , for example, NewPoint _SUM =T ₁ ×T _1point . The product of the second data quantity T _1point and the second period quantity T ₁ is taken as the quantity of voltage data required by the current waveform file. The electronic device extracts the generated multiple third voltage amplitudes according to NewPoint _SUM , that is, deletes the voltage data that exceeds the number of NewPoint _SUM among the multiple third voltage amplitudes, to ensure that the AC drive signal generated by the current waveform file is The signal of the whole cycle, so as to ensure the continuity of vibration.

In this embodiment, the electronic device uses the first transformation coefficient and the second transformation coefficient that represent the proportional relationship between the current resonance frequency and the initial resonance frequency, and based on the first transformation coefficient and the second transformation coefficient, respectively, according to the first transformation coefficient of the initial waveform file. The number of cycles and the number of first data, to obtain the number of second cycles and the number of data required by the current waveform file, and further obtain the number of voltage data required by the current waveform file according to the product of the number of second cycles and the number of second data , and then extract the third voltage amplitude according to the required number of voltage data, thereby removing part of the voltage data to obtain the waveform file data of a complete cycle, so as to ensure the continuity of the shock sensation and improve the user experience.

Optionally, the vibration mode of the motor is a long vibration mode.

In this embodiment, since the current waveform file is a waveform file with a complete cycle, the electronic device can ensure the waveform of the AC drive signal in the long vibration mode, that is, in the case of driving the motor using the current waveform file cyclically. Continuous, so using the current waveform file to drive the motor circularly will not cause discontinuous vibration, which improves the user experience.

Optionally, the method further includes: when the current resonant frequency is greater than the initial resonant frequency, performing zero-filling processing on the current waveform file to obtain an updated waveform file, wherein the voltage data in the updated waveform file is The number is the same as the number of voltage data in the initial waveform file, and the initial waveform file is the waveform file corresponding to the initial resonance frequency.

In this embodiment, when the current resonant frequency is greater than the initial resonant frequency, the number of third voltage amplitudes obtained after frequency transformation is less than the number of voltage data in the initial waveform file data. In the case of the data length of the waveform file, the remaining blanks are filled with zeros to obtain an updated waveform file with the same number of voltage data in the initial waveform file, which can avoid changing the length of the stored data of the waveform file, so it is convenient for data Storage can reduce the amount of computation while ensuring the accuracy of data processing.

Optionally, the vibration mode of the motor is a short vibration mode, and the initial resonance frequency is a minimum vibration frequency of the motor.

In this embodiment, when the vibration mode of the motor is a short vibration mode, for example, when a button is touched or a call is successfully connected, the motor feedback vibration. By pre-storing the initial waveform file of the minimum vibration frequency of the motor, the current waveform file corresponding to the determined current resonant frequency will not have more points. At this time, the electronic device performs the initial waveform file of the minimum resonant frequency on the current waveform file. The number of voltage data in the original waveform file is zero-filled to obtain the updated waveform file with the same number of voltage data in the initial waveform file, so as to avoid changing the length of the data stored in the initial waveform file, so it is convenient for data storage and can reduce the amount of computation. At the same time, ensure the accuracy of data processing.

Optionally, the acquiring the initial resonance frequency and the current resonance frequency of the motor includes:

Acquire multiple acceleration data corresponding to each AC drive signal when multiple AC drive signals drive the motor to vibrate. The acceleration data is used to represent the magnitude of the acceleration of the motor during vibration. The frequency of the multiple AC drive signals is distributed in within the driving frequency range of the motor;

determining an average acceleration corresponding to each of the multiple AC drive signals according to the multiple acceleration data of the multiple AC drive signals;

The current resonance frequency is determined according to the maximum average acceleration among the plurality of average accelerations of the plurality of AC drive signals, wherein the current resonance frequency is the frequency of the AC drive signal corresponding to the maximum average acceleration.

In this embodiment, the electronic device acquires multiple acceleration data corresponding to each AC drive signal when the motor vibrates with multiple AC drive signals. Since the frequencies of the multiple AC drive signals are distributed within the drive frequency range of the motor, the electronic device The device can acquire multiple acceleration data corresponding to multiple frequencies within the driving frequency range by sweeping the frequency. Then the electronic device accurately and conveniently determines the current resonance frequency corresponding to the maximum average acceleration according to the maximum average acceleration among the average accelerations corresponding to each AC signal. The method does not need to adjust the frequency of the motor by adding a feedback circuit, thus saving cost. At the same time, since the method does not increase the feedback circuit, the requirements for hardware are lower, and the application scenarios are more extensive.

Optionally, determining the average acceleration corresponding to each of the multiple AC drive signals according to the multiple acceleration data of the multiple AC drive signals includes:

acquiring the peak-to-peak value of the acceleration data corresponding to each of the plurality of AC drive signals;

The average acceleration corresponding to each of the plurality of AC driving signals is determined according to the peak-to-peak value.

In this embodiment, the electronic device obtains the peak-to-peak value of the acceleration data corresponding to each of the above-mentioned multiple AC drive signals, removes the negative value in the calculation process, and then calculates the peak-to-peak value corresponding to each AC drive signal based on the calculation process. To determine the average acceleration corresponding to each of the multiple AC drive signals, compared with the method of directly deleting the data of the negative part, the peak-to-peak value can increase the difference between the data, which is convenient for screening and comparison.

Optionally, the peak-to-peak value is data obtained by removing the overshoot value from the first peak-to-peak value, and/or the peak-to-peak value is obtained by down-sampling the first peak-to-peak value according to a preset sampling rate. data; the first peak-to-peak value is the original peak-to-peak value of the acceleration data corresponding to each of the plurality of AC drive signals.

In this embodiment, by removing the overshoot value from the first peak-to-peak value, the validity of the data can be ensured, the accuracy of the average acceleration is improved, and the accuracy of the current resonance frequency is further ensured. By down-sampling the first peak-to-peak value, the The data volume is effectively reduced, the data processing efficiency is improved, and the generation efficiency of the waveform file is further improved.

In a second aspect, an apparatus for generating a waveform file is provided, including a unit composed of software and/or hardware, and the unit is configured to execute any one of the methods in the technical solutions described in the first aspect.

In a third aspect, an electronic device is provided, including a processor and a memory, the memory is used for storing a computer program, the processor is used for calling and running the computer program from the memory, so that the electronic device executes the first aspect. Any method in the technical solution.

In a fourth aspect, a computer-readable storage medium is provided, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the processor is caused to execute the technology described in the first aspect any method in the program.

In a fifth aspect, a computer program product is provided, the computer program product includes: computer program code, when the computer program code is run on a terminal device, the terminal device is made to execute the technical solution described in the first aspect. any method.

Description of drawings

FIG. 1 is a schematic structural diagram of an example of a terminal device 100 provided by an embodiment of the present application;

FIG. 2 is a software structural block diagram of a terminal device 100 provided by an embodiment of the present application;

3 is a flowchart of an example of a method for determining the current resonance frequency of a motor provided by an embodiment of the present application;

4 is a schematic diagram of an example of acquired acceleration data provided by an embodiment of the present application;

FIG. 5 is a graph of a plurality of average accelerations corresponding to a plurality of frequencies according to an example of the present application;

Fig. 6 is the graph of the average acceleration after the data in Fig. 5 is smoothed and filtered;

7 is a schematic diagram of an example of acceleration data obtained in a fixed state of a motor provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of an example of acceleration data obtained when a motor is in a suspended state provided by an embodiment of the present application;

9 is a waveform diagram of an example of the current resonance frequency obtained multiple times provided by the embodiment of the present application;

10 is a flowchart of an example of a method for obtaining a current resonance frequency provided by an embodiment of the present application;

11 is a schematic diagram of an example of voltage data provided by an embodiment of the present application;

12 is a flowchart of an example of a method for generating a waveform file provided by an embodiment of the present application;

FIG. 13 is a schematic diagram of an example of corresponding waveform files according to the sampling time provided by the embodiment of the present application;

14 is a schematic diagram of an example of voltage data provided by an embodiment of the present application;

15 is a schematic diagram of the number of points of voltage data in each cycle in an example of waveform files with different frequencies provided by an embodiment of the present application;

16 is a schematic diagram of an example of a waveform file with a complete cycle provided by an embodiment of the present application;

FIG. 17 is a schematic diagram of an example of a waveform file in which a waveform is mutated provided by an embodiment of the present application;

18 is a schematic diagram of an example of a waveform file after zero-filling provided by an embodiment of the present application;

FIG. 19 is a schematic structural diagram of an example of an apparatus for generating a waveform file provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, in the description of the embodiments of the present application, unless otherwise stated, “/” means or means, for example, A/B can mean A or B; “and/or” in this document is only a description of the associated object The association relationship of , indicates that there can be three kinds of relationships, for example, A and/or B, can indicate that A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" refers to two or more than two.

Hereinafter, the terms "first", "second" and "third" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include one or more of that feature.

The method for generating a waveform file provided by the embodiments of the present application can be applied to mobile phones, tablet computers, wearable devices, in-vehicle devices, augmented reality (AR)/virtual reality (VR) devices, notebook computers, super mobile devices On terminal devices such as a personal computer (ultra-mobile personal computer, UMPC), a netbook, and a personal digital assistant (personal digital assistant, PDA), the embodiments of the present application do not impose any restrictions on the specific type of the terminal device.

Exemplarily, FIG. 1 is a schematic structural diagram of an example of a terminal device 100 provided by an embodiment of the present application. The terminal device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, Mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone jack 170D, sensor module 180, buttons 190, motor 191, indicator 192, camera 193, display screen 194, and user A subscriber identification module (SIM) card interface 195 and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, and ambient light. Sensor 180L, bone conduction sensor 180M, etc.

It can be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the terminal device 100 . In other embodiments of the present application, the terminal device 100 may include more or less components than those shown in the drawings, or combine some components, or separate some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor ( image signal processor, ISP), controller, memory, video codec, digital signal processor (DSP), baseband processor, and/or neural-network processing unit (NPU), etc. . Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The controller may be the nerve center and command center of the terminal device 100 . The controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in processor 110 is cache memory. This memory may hold instructions or data that have just been used or recycled by the processor 110 . If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 110 is reduced, thereby increasing the efficiency of the system.

In some embodiments, the processor 110 may include one or more interfaces. The interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuitsound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver (universal asynchronous receiver) interface /transmitter, UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and/or Universal serial bus (universal serial bus, USB) interface, etc.

The I2C interface is a bidirectional synchronous serial bus that includes a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor 110 may contain multiple sets of I2C buses. The processor 110 can be respectively coupled to the touch sensor 180K, the charger, the flash, the camera 193 and the like through different I2C bus interfaces. For example, the processor 110 may couple the touch sensor 180K through the I2C interface, so that the processor 110 and the touch sensor 180K communicate with each other through the I2C bus interface, so as to realize the touch function of the terminal device 100 .

The I2S interface can be used for audio communication. In some embodiments, the processor 110 may contain multiple sets of I2S buses. The processor 110 may be coupled with the audio module 170 through an I2S bus to implement communication between the processor 110 and the audio module 170 . In some embodiments, the audio module 170 can transmit audio signals to the wireless communication module 160 through the I2S interface, so as to realize the function of answering calls through a Bluetooth headset.

The PCM interface can also be used for audio communications, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 may be coupled through a PCM bus interface. In some embodiments, the audio module 170 can also transmit audio signals to the wireless communication module 160 through the PCM interface, so as to realize the function of answering calls through the Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

The UART interface is a universal serial data bus used for asynchronous communication. The bus may be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, a UART interface is typically used to connect the processor 110 with the wireless communication module 160 . For example, the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface to implement the Bluetooth function. In some embodiments, the audio module 170 can transmit audio signals to the wireless communication module 160 through the UART interface, so as to realize the function of playing music through the Bluetooth headset.

The MIPI interface can be used to connect the processor 110 with peripheral devices such as the display screen 194 and the camera 193 . The MIPI interface includes a camera serial interface (camera serial interface, CSI), a display serial interface (displayserial interface, DSI), and the like. In some embodiments, the processor 110 communicates with the camera 193 through the CSI interface, so as to realize the shooting function of the terminal device 100 . The processor 110 communicates with the display screen 194 through the DSI interface to implement the display function of the terminal device 100 .

The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some embodiments, the GPIO interface may be used to connect the processor 110 with the camera 193, the display screen 194, the wireless communication module 160, the audio module 170, the sensor module 180, and the like. The GPIO interface can also be configured as I2C interface, I2S interface, UART interface, MIPI interface, etc.

The USB interface 130 is an interface that conforms to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like. The USB interface 130 can be used to connect a charger to charge the terminal device 100, and can also be used to transmit data between the terminal device 100 and peripheral devices. It can also be used to connect headphones to play audio through the headphones. This interface can also be used to connect other terminal devices, such as AR devices.

It can be understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration, and does not constitute a structural limitation of the terminal device 100 . In other embodiments of the present application, the terminal device 100 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.

The charging management module 140 is used to receive charging input from the charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from the wired charger through the USB interface 130 . In some wireless charging embodiments, the charging management module 140 may receive wireless charging input through the wireless charging coil of the terminal device 100 . While the charging management module 140 charges the battery 142 , it can also supply power to the terminal device through the power management module 141 .

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 . The power management module 141 receives input from the battery 142 and/or the charging management module 140 and supplies power to the processor 110 , the internal memory 121 , the external memory, the display screen 194 , the camera 193 , and the wireless communication module 160 . The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance). In some other embodiments, the power management module 141 may also be provided in the processor 110 . In other embodiments, the power management module 141 and the charging management module 140 may also be provided in the same device.

The wireless communication function of the terminal device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modulation and demodulation processor, the baseband processor, and the like.

Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. The structures of the antenna 1 and the antenna 2 in FIG. 1 are only an example. Each antenna in terminal device 100 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a wireless communication solution including 2G/3G/4G/5G etc. applied on the terminal device 100 . The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and then turn it into an electromagnetic wave for radiation through the antenna 1 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the processor 110 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the same device as at least part of the modules of the processor 110 .

The modem processor may include a modulator and a demodulator. Wherein, the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and passed to the application processor. The application processor outputs sound signals through audio devices (not limited to the speaker 170A, the receiver 170B, etc.), or displays images or videos through the display screen 194 . In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be independent of the processor 110, and may be provided in the same device as the mobile communication module 150 or other functional modules.

The wireless communication module 160 can provide wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), and global navigation satellite systems applied on the terminal device 100 . (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 . The wireless communication module 160 can also receive the signal to be sent from the processor 110 , perform frequency modulation on it, amplify the signal, and then convert it into an electromagnetic wave for radiation through the antenna 2 .

In some embodiments, the antenna 1 of the terminal device 100 is coupled with the mobile communication module 150, and the antenna 2 is coupled with the wireless communication module 160, so that the terminal device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code Wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM , and/or IR technology, etc. The GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a Beidou satellite navigation system (BDS), a quasi-zenith satellite system (quasi- zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).

The terminal device 100 implements a display function through a GPU, a display screen 194, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

Display screen 194 is used to display images, videos, and the like. Display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode). , AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diodes (quantum dot light emitting diodes, QLED) and so on. In some embodiments, the terminal device 100 may include one or N display screens 194 , where N is a positive integer greater than one.

The terminal device 100 can realize the shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194 and the application processor.

The ISP is used to process the data fed back by the camera 193 . For example, when taking a photo, the shutter is opened, the light is transmitted to the camera photosensitive element through the lens, the light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converts it into an image visible to the naked eye. ISP can also perform algorithm optimization on image noise, brightness, and skin tone. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, the ISP may be provided in the camera 193 .

Camera 193 is used to capture still images or video. The object is projected through the lens to generate an optical image onto the photosensitive element. The photosensitive element can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. DSP converts digital image signals into standard RGB, YUV and other formats of image signals. In some embodiments, the terminal device 100 may include 1 or N cameras 193 , where N is a positive integer greater than 1.

A digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. For example, when the terminal device 100 selects a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy, and the like.

Video codecs are used to compress or decompress digital video. The terminal device 100 may support one or more video codecs. In this way, the terminal device 100 can play or record videos in various encoding formats, such as: Moving Picture Experts Group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.

The NPU is a neural-network (NN) computing processor. By drawing on the structure of biological neural networks, such as the transfer mode between neurons in the human brain, it can quickly process the input information and can continuously learn by itself. Applications such as intelligent cognition of the terminal device 100 can be implemented through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, so as to expand the storage capacity of the terminal device 100 . The external memory card communicates with the processor 110 through the external memory interface 120 to realize the data storage function. For example to save files like music, video etc in external memory card.

Internal memory 121 may be used to store computer executable program code, which includes instructions. The processor 110 executes various functional applications and data processing of the terminal device 100 by executing the instructions stored in the internal memory 121 . The internal memory 121 may include a storage program area and a storage data area. The storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like. The storage data area may store data (such as audio data, phone book, etc.) created during the use of the terminal device 100 and the like. In addition, the internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), and the like.

The terminal device 100 may implement audio functions through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, an application processor, and the like. Such as music playback, recording, etc.

The audio module 170 is used for converting digital audio information into analog audio signal output, and also for converting analog audio input into digital audio signal. Audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be provided in the processor 110 , or some functional modules of the audio module 170 may be provided in the processor 110 .

Speaker 170A, also referred to as a "speaker", is used to convert audio electrical signals into sound signals. The terminal device 100 can listen to music through the speaker 170A, or listen to a hands-free call.

The receiver 170B, also referred to as "earpiece", is used to convert audio electrical signals into sound signals. When the terminal device 100 answers a call or a voice message, the voice can be answered by placing the receiver 170B close to the human ear.

The microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can make a sound by approaching the microphone 170C through a human mouth, and input the sound signal into the microphone 170C. The terminal device 100 may be provided with at least one microphone 170C. In other embodiments, the terminal device 100 may be provided with two microphones 170C, which may implement a noise reduction function in addition to collecting sound signals. In other embodiments, the terminal device 100 may further be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and implement directional recording functions.

The earphone jack 170D is used to connect wired earphones. The earphone interface 170D may be the USB interface 130, or may be a 3.5mm open mobile terminal platform (OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface.

The pressure sensor 180A is used to sense pressure signals, and can convert the pressure signals into electrical signals. In some embodiments, the pressure sensor 180A may be provided on the display screen 194 . There are many types of pressure sensors 180A, such as resistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, and the like. The capacitive pressure sensor may be comprised of at least two parallel plates of conductive material. When a force is applied to the pressure sensor 180A, the capacitance between the electrodes changes. The terminal device 100 determines the intensity of the pressure according to the change in capacitance. When a touch operation acts on the display screen 194, the terminal device 100 detects the intensity of the touch operation according to the pressure sensor 180A. The terminal device 100 may also calculate the touched position according to the detection signal of the pressure sensor 180A. In some embodiments, touch operations acting on the same touch position but with different touch operation intensities may correspond to different operation instructions. For example, when a touch operation whose intensity is less than the first pressure threshold acts on the short message application icon, the instruction for viewing the short message is executed. When a touch operation with a touch operation intensity greater than or equal to the first pressure threshold acts on the short message application icon, the instruction to create a new short message is executed.

The gyro sensor 180B may be used to determine the motion attitude of the terminal device 100 . In some embodiments, the angular velocity of the end device 100 about three axes (ie, x, y, and z axes) may be determined by the gyro sensor 180B. The gyro sensor 180B can be used for image stabilization. Exemplarily, when the shutter is pressed, the gyroscope sensor 180B detects the shaking angle of the terminal device 100, calculates the distance to be compensated by the lens module according to the angle, and allows the lens to offset the shaking of the terminal device 100 through reverse motion to achieve anti-shake. The gyro sensor 180B can also be used for navigation and somatosensory game scenarios.

The air pressure sensor 180C is used to measure air pressure. In some embodiments, the terminal device 100 calculates the altitude through the air pressure value measured by the air pressure sensor 180C to assist in positioning and navigation.

The magnetic sensor 180D includes a Hall sensor. The terminal device 100 can detect the opening and closing of the flip holster using the magnetic sensor 180D. In some embodiments, when the terminal device 100 is a flip machine, the terminal device 100 can detect the opening and closing of the flip according to the magnetic sensor 180D. Further, according to the detected opening and closing state of the leather case or the opening and closing state of the flip cover, characteristics such as automatic unlocking of the flip cover are set.

The acceleration sensor 180E can detect the magnitude of the acceleration of the terminal device 100 in various directions (generally three axes). The magnitude and direction of gravity can be detected when the terminal device 100 is stationary. It can also be used to identify the posture of terminal devices, and can be used in applications such as horizontal and vertical screen switching, pedometers, etc.

Distance sensor 180F for measuring distance. The terminal device 100 can measure the distance through infrared or laser. In some embodiments, when shooting a scene, the terminal device 100 can use the distance sensor 180F to measure the distance to achieve fast focusing.

Proximity light sensor 180G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes. The light emitting diodes may be infrared light emitting diodes. The terminal device 100 emits infrared light to the outside through the light emitting diode. The terminal device 100 detects infrared reflected light from nearby objects using a photodiode. When sufficient reflected light is detected, it can be determined that there is an object near the terminal device 100 . When insufficient reflected light is detected, the terminal device 100 may determine that there is no object near the terminal device 100 . The terminal device 100 can use the proximity light sensor 180G to detect that the user holds the terminal device 100 close to the ear to talk, so as to automatically turn off the screen to save power. Proximity light sensor 180G can also be used in holster mode, pocket mode automatically unlocks and locks the screen.

The ambient light sensor 180L is used to sense ambient light brightness. The terminal device 100 can adaptively adjust the brightness of the display screen 194 according to the perceived ambient light brightness. The ambient light sensor 180L can also be used to automatically adjust the white balance when taking pictures. The ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the terminal device 100 is in a pocket, so as to prevent accidental touch.

The fingerprint sensor 180H is used to collect fingerprints. The terminal device 100 can use the collected fingerprint characteristics to realize fingerprint unlocking, accessing application locks, taking photos with fingerprints, answering incoming calls with fingerprints, and the like.

The temperature sensor 180J is used to detect the temperature. In some embodiments, the terminal device 100 uses the temperature detected by the temperature sensor 180J to execute the temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold, the terminal device 100 performs performance reduction of the processor located near the temperature sensor 180J, so as to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold, the terminal device 100 heats the battery 142 to avoid abnormal shutdown of the terminal device 100 caused by the low temperature. In some other embodiments, when the temperature is lower than another threshold, the terminal device 100 boosts the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.

Touch sensor 180K, also called "touch panel". The touch sensor 180K may be disposed on the display screen 194 , and the touch sensor 180K and the display screen 194 form a touch screen, also called a “touch screen”. The touch sensor 180K is used to detect a touch operation on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to touch operations may be provided through display screen 194 . In other embodiments, the touch sensor 180K may also be disposed on the surface of the terminal device 100 , which is different from the position where the display screen 194 is located.

The bone conduction sensor 180M can acquire vibration signals. In some embodiments, the bone conduction sensor 180M can acquire the vibration signal of the vibrating bone mass of the human voice. The bone conduction sensor 180M can also contact the pulse of the human body and receive the blood pressure beating signal. In some embodiments, the bone conduction sensor 180M can also be disposed in the earphone, combined with the bone conduction earphone. The audio module 170 can analyze the voice signal based on the vibration signal of the vocal vibration bone block obtained by the bone conduction sensor 180M, so as to realize the voice function. The application processor can analyze the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor 180M, so as to realize the function of heart rate detection.

The keys 190 include a power-on key, a volume key, and the like. Keys 190 may be mechanical keys. Touch buttons are also possible. The terminal device 100 may receive key input and generate key signal input related to user settings and function control of the terminal device 100 .

Motor 191 can generate vibrating cues. The motor 191 can be used for vibrating alerts for incoming calls, and can also be used for touch vibration feedback. For example, touch operations acting on different applications (such as taking pictures, playing audio, etc.) can correspond to different vibration feedback effects. The motor 191 can also correspond to different vibration feedback effects for touch operations on different areas of the display screen 194 . Different application scenarios (for example: time reminder, receiving information, alarm clock, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also support customization.

The indicator 192 can be an indicator light, which can be used to indicate the charging state, the change of the power, and can also be used to indicate a message, a missed call, a notification, and the like.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be contacted and separated from the terminal device 100 by inserting into the SIM card interface 195 or pulling out from the SIM card interface 195 . The terminal device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card and so on. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 can also be compatible with different types of SIM cards. The SIM card interface 195 is also compatible with external memory cards. The terminal device 100 interacts with the network through the SIM card to realize functions such as calls and data communication. In some embodiments, the terminal device 100 adopts an eSIM, that is, an embedded SIM card. The eSIM card can be embedded in the terminal device 100 and cannot be separated from the terminal device 100 .

The software system of the terminal device 100 may adopt a layered architecture, an event-driven architecture, a microkernel architecture, a microservice architecture, or a cloud architecture. The embodiments of the present application take an Android system with a layered architecture as an example to exemplarily describe the software structure of the terminal device 100 .

FIG. 2 is a block diagram of a software structure of a terminal device 100 according to an embodiment of the present application. The layered architecture divides the software into several layers, and each layer has a clear role and division of labor. Layers communicate with each other through software interfaces. In some embodiments, the Android system is divided into four layers, which are, from top to bottom, an application layer, an application framework layer, an Android runtime (Android runtime) and system libraries, and a kernel layer. The application layer can include a series of application packages.

As shown in Figure 2, the application package can include applications such as camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, short message and so on.

The application framework layer provides an application programming interface (application programming interface, API) and a programming framework for the applications of the application layer. The application framework layer includes some predefined functions.

As shown in Figure 2, the application framework layer may include window managers, content providers, view systems, telephony managers, resource managers, notification managers, and the like.

A window manager is used to manage window programs. The window manager can get the size of the display screen, determine whether there is a status bar, lock the screen, take screenshots, etc.

Content providers are used to store and retrieve data and make these data accessible to applications. The data may include video, images, audio, calls made and received, browsing history and bookmarks, phone book, etc.

The view system includes visual controls, such as controls for displaying text, controls for displaying pictures, and so on. View systems can be used to build applications. A display interface can consist of one or more views. For example, the display interface including the short message notification icon may include a view for displaying text and a view for displaying pictures.

The telephony manager is used to provide the communication function of the terminal device 100 . For example, the management of call status (including connecting, hanging up, etc.).

The resource manager provides various resources for the application, such as localization strings, icons, pictures, layout files, video files and so on.

The notification manager enables applications to display notification information in the status bar, which can be used to convey notification-type messages, and can disappear automatically after a brief pause without user interaction. For example, the notification manager is used to notify download completion, message reminders, etc. The notification manager can also display notifications in the status bar at the top of the system in the form of graphs or scroll bar text, such as notifications of applications running in the background, and notifications on the screen in the form of dialog windows. For example, text information is prompted in the status bar, a prompt sound is issued, the terminal device vibrates, and the indicator light flashes.

The Android runtime includes core libraries and a virtual machine. The Android runtime is responsible for the scheduling and management of the Android system.

The core library consists of two parts: one is the function functions that the java language needs to call, and the other is the core library of Android.

The application layer and the application framework layer run in virtual machines. The virtual machine executes the java files of the application layer and the application framework layer as binary files. The virtual machine is used to perform functions such as object lifecycle management, stack management, thread management, safety and exception management, and garbage collection.

A system library can include multiple functional modules. For example: surface manager (surface manager), media library (media libraries), 3D graphics processing library (eg: OpenGL ES), 2D graphics engine (eg: SGL), etc.

The Surface Manager is used to manage the display subsystem and provides a fusion of 2D and 3D layers for multiple applications.

The media library supports playback and recording of a variety of commonly used audio and video formats, as well as still image files. The media library can support a variety of audio and video encoding formats, such as: MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, etc.

The 3D graphics processing library is used to implement 3D graphics drawing, image rendering, compositing, and layer processing.

2D graphics engine is a drawing engine for 2D drawing.

The kernel layer is the layer between hardware and software. The kernel layer contains at least display drivers, camera drivers, audio drivers, and sensor drivers.

For ease of understanding, the following embodiments of the present application will take the terminal device having the structure shown in FIG. 1 and FIG. 2 as an example, and combine the drawings and application scenarios to specifically describe the method for generating a waveform file provided by the embodiments of the present application. Generally, linear motors vibrate through the motion of the vibrator in the magnetic field. Different linear motors have different vibration sensations due to different resonance frequencies. Each linear motor has its own resonant frequency. If the linear motor is driven according to the respective resonant frequency, the linear motor has the strongest vibration sense, that is, the strongest amplitude. Usually with the use of a linear motor (hereinafter referred to as a motor), the resonant frequency may shift. When the resonant frequency of the motor is shifted, if the initial waveform file is still used to generate the AC drive signal, that is, according to the initial resonant frequency. If the motor is driven, the vibration will be weakened, and the vibration effect cannot be guaranteed. The embodiment of the present application first obtains the resonance frequency corresponding to the motor by comparing the acceleration of the motor under AC drive signals of different frequencies, and then performs frequency conversion on the initial waveform file to obtain the waveform file corresponding to the resonance frequency to generate the drive motor. The AC drive signal enables the motor to achieve the best vibration sensation under the drive of its resonant frequency.

The technical solutions of the embodiments of the present application can be used in a scenario where a Class D power amplifier (Class D) drives a motor. By adopting the ClassD drive motor, the existing drive signal of the electronic device can be directly used, and the drive of the motor can be realized without adding other hardware costs. Even if the electronic equipment adds the ClassD hardware circuit to obtain the driving signal, the cost of motor calibration is greatly reduced compared to adding the feedback circuit. The above electronic device may be a terminal device as shown in FIG. 1 .

Here, the detailed process of how the electronic device obtains the current resonance frequency of the motor in the current state is first described.

FIG. 3 is a flowchart of an example of a method for determining a current resonance frequency of a motor according to an embodiment of the present application. As shown in FIG. 3, method 300 includes:

S310: Acquire multiple acceleration data corresponding to each AC drive signal when the motor is vibrated by multiple AC drive signals, where the acceleration data is used to represent the magnitude of the acceleration of the motor during vibration, and the frequencies of the multiple AC drive signals distributed over the drive frequency range of the motor.

Firstly, waveform files of multiple frequencies can be preset in the electronic device, and the corresponding frequencies of the multiple waveform files can cover the driving frequency range of the motor, wherein the driving frequency range represents the distribution of the resonant frequency after the resonant frequency of the motor is shifted. scope. For example, when the initial resonant frequency of the motor is 235HZ, usually after the resonant frequency of the motor is shifted, its resonant frequency is also distributed in the range of 230HZ-240HZ. At this time, it can be considered that the driving frequency range of the motor is 230HZ-240HZ. At this time, The waveform files of multiple frequencies can include waveform files of 11 frequencies such as 230HZ, 231HZ, 232HZ... until 240HZ.

Specifically, the electronic device can generate corresponding AC drive signals by using the waveform files of the above-mentioned multiple frequencies to drive the motor to vibrate respectively, and at the same time collect the acceleration data during the motor vibration through the acceleration sensor. For example, the electronic device can use the AC drive signal generated by the waveform file corresponding to one frequency to drive the motor to vibrate for 500 milliseconds, stop for 50 milliseconds in the middle, and then use the AC drive signal generated by the waveform file corresponding to the next frequency to drive the motor to continue to vibrate. A plurality of acceleration data when the motor is driven by an AC drive signal. Taking the driving frequency range of 230HZ-240HZ as an example, the frequency interval corresponding to each waveform file is 1HZ. When the AC drive signal generated by these multiple waveform files is used to drive the motor to vibrate The acceleration data can be seen in Figure 4, where the horizontal axis is time, and the vertical axis represents the acceleration data of motor vibration. The acceleration data in FIG. 4 includes positive acceleration data (the vertical axis coordinate is greater than 0) and negative acceleration data (the vertical axis coordinate is less than 0). The above acceleration data can represent the magnitude of the acceleration of the motor during vibration.

S320. Determine an average acceleration corresponding to each AC drive signal in the multiple AC drive signals according to the multiple acceleration data of the multiple AC drive signals.

Specifically, the electronic device may determine the average acceleration corresponding to each of the above-mentioned AC driving signals after data processing and comparison according to the plurality of acceleration data of the above-mentioned plurality of AC driving signals. For example, the electronic device can delete the negative part of the above-mentioned multiple acceleration data, keep the positive part of the acceleration data, and then average the maximum amplitude of each cycle in these positive acceleration data as the AC drive of this frequency The average acceleration corresponding to the signal. The average acceleration can characterize the magnitude of the amplitude when the AC drive signal of the corresponding frequency drives the motor to vibrate.

S330. Determine the current resonance frequency according to the maximum average acceleration among the multiple average accelerations of the multiple AC drive signals, where the current resonance frequency is the frequency of the AC drive signal corresponding to the maximum average acceleration.

Specifically, the electronic device may compare the above-mentioned multiple average accelerations to obtain the maximum average acceleration, and then use the frequency corresponding to the maximum average acceleration as the current resonance frequency that can maximize the motor amplitude.

Optionally, the electronic device can also connect the above-mentioned multiple average accelerations in a coordinate system, and generate a graph, as shown in FIG. 5 , the horizontal axis is the number of points, and the vertical axis is the acceleration. The average acceleration is shown as an example. Optionally, smooth filtering may also be performed on the data in FIG. 5 to obtain the curve shown in FIG. 6 . Then, the frequency corresponding to the maximum average acceleration in FIG. 6 is superimposed with a preset frequency offset, and used as the current resonance frequency. For example, when the frequency interval corresponding to each AC drive signal is 1HZ, the electronic device uses the data of four average accelerations for smooth filtering, that is, the average value of the average acceleration corresponding to the four nearby frequencies is taken as the average acceleration corresponding to the current frequency, and then the maximum Add 2HZ to the frequency corresponding to the average acceleration as the current resonance frequency. Optionally, the electronic device may write the finally determined value of the current resonance frequency into a corresponding non-volatile (non-volatile, NV) parameter item for subsequent calling. The smooth filtering method is used to process multiple average accelerations to obtain the maximum average acceleration, which can effectively remove interference noise and make the current resonant frequency more accurate.

In this embodiment, the electronic device acquires multiple acceleration data corresponding to each AC drive signal when the motor vibrates with multiple AC drive signals. Since the frequencies of the multiple AC drive signals are distributed within the drive frequency range of the motor, the electronic device The device can acquire multiple acceleration data corresponding to multiple frequencies within the driving frequency range by sweeping the frequency. Then the electronic device accurately and conveniently determines the current resonance frequency corresponding to the maximum average acceleration according to the maximum average acceleration among the average accelerations corresponding to each AC signal. The method does not need to adjust the frequency of the motor by adding a feedback circuit, thus saving cost. At the same time, since the method does not increase the feedback circuit, the requirements for hardware are lower, and the application scenarios are more extensive.

Optionally, on the basis of the above-mentioned embodiment shown in FIG. 3 , an implementation manner of step S320 may further include: in order to facilitate calculation, the electronic device converts the acceleration data corresponding to each AC drive signal in the above-mentioned multiple AC drive signals. The processing of removing negative numbers is performed, that is, the peak-to-peak value of the acceleration data corresponding to each AC drive signal is obtained, and then the average acceleration corresponding to each of the multiple AC drive signals is determined based on the peak-to-peak value corresponding to each AC drive signal. The peak-to-peak value is used to determine the average acceleration. Compared with the method of directly deleting the data of the negative part, the peak-to-peak value can enlarge the difference between the data, which is convenient for screening and comparison.

Optionally, the above acceleration data is usually data with periodicity, and the electronic device may take the original peak-to-peak value of the periodic acceleration data as the first peak-to-peak value. Usually, the motor will have overshoot when it starts to vibrate, so you can delete the overshoot value of the first peak-to-peak value that starts to vibrate for a period of time to ensure the validity of the data. For example, when the first peak-to-peak value of each AC drive signal has 250 points of data, the first 80 points can be deleted to effectively remove overshoot. Optionally, the electronic device may further downsample the first peak-to-peak value according to a preset sampling rate, for example, take a first peak-to-peak value every 20 points as the above-mentioned peak-to-peak value. Among them, the preset sampling rate can be set according to the accuracy requirements of the data and the operation efficiency. If the accuracy requirements of the data are high, a first peak-to-peak value can be taken every 10 points or less. If the operation efficiency requirements are high, then A first peak-to-peak value may be taken for every 30 points or too many points, and the setting of the preset sampling rate is not limited in this embodiment of the present application.

Optionally, the electronic device may also remove the overshoot value in the first peak-to-peak value and perform down-sampling at the same time, so as to ensure the validity of the data, reduce the amount of computation, and improve the data processing efficiency. Optionally, the electronic device may also remove the overshoot point from the above acceleration data, and/or downsample the acceleration data according to a preset sampling rate, and then obtain the peak-to-peak value of the processed acceleration data, which can also ensure the data. Effectiveness and reduce the amount of computation, improve the efficiency of data processing, and thus improve the generation efficiency of wave files.

In the process of actually collecting the acceleration data, the motor can be collected in a fixed state, so that the overshoot of the acceleration data obtained in the fixed state will be greatly reduced, so that the peak-to-peak overshoot is reduced, and the determined value is further improved. The accuracy of the current resonant frequency. As shown in Figure 7 and Figure 8, Figure 7 is the acceleration data collected when the motor is fixed, Figure 8 is the acceleration data collected when the motor is suspended, in contrast, the AC drive signals of multiple frequencies in Figure 8 Under the driving of , the motor has obvious overshoot when it starts to vibrate, which is shown in Figure 8 as multiple protruding burrs.

Optionally, the electronic device may also obtain multiple current resonance frequencies by repeating the above method multiple times to observe the consistency of these current resonance frequencies, so as to ensure the accuracy and validity of the obtained current resonance frequencies. For example, as shown in Figure 9, after five tests, the obtained current resonant frequency is distributed between 228HZ and 229HZ, usually allowing a plus or minus 2HZ error. If the motor's driving frequency range is 230HZ-240HZ, it can be determined that the motor adopts 230HZ resonance Frequency; if the driving frequency range of the motor is 225HZ-235HZ, it can be determined that the vibration is the strongest under the driving of the AC driving signal of 228HZ.

For a clearer and complete description of how to obtain the current resonance frequency, a specific embodiment is described here. As shown in FIG. 10 , the method 1000 for obtaining the current resonance frequency by an electronic device may include the following steps:

S1010: Acquire acceleration data when the motor is driven by an AC drive signal of 11 frequencies every 1HZ in 230HZ-240HZ.

S1020. For the above acceleration data, take the peak-to-peak value of the acceleration data at every 20 points.

S1030 , obtain the average acceleration corresponding to the AC drive signal of each frequency according to the peak-to-peak value corresponding to each AC drive signal, and obtain the average acceleration corresponding to 11 frequency points.

S1040 , taking the average of 11 average accelerations every four to obtain the average acceleration after smoothing filtering.

S1050, taking the maximum value of the average acceleration after smoothing filtering.

S1060 , adding 2 Hz to the frequency of the AC drive signal corresponding to the maximum value of the smoothed and filtered average acceleration as the current resonance frequency.

S1070, write the current resonance frequency into the corresponding NV.

For the implementation details and beneficial effects of obtaining the current resonance frequency in this embodiment, reference may be made to the description of Brother Zhong in the foregoing embodiment, which will not be repeated here.

The above embodiments describe how the electronic device obtains the current resonant frequency of the motor. The following will describe the specific process of how to generate a waveform file for driving the motor based on the current resonant frequency.

The embodiment of the present application may be implemented by performing spectrum spreading on the initial waveform file of the initial resonance frequency. First, we define the first proportional coefficient, that is, the ratio of the current resonant frequency to the initial resonant frequency as the proportional coefficient. Taking the current resonant frequency as 232HZ and the initial resonant frequency as 235HZ as an example, the proportional coefficient Vision=232/235, the proportional coefficient can be Take floating point numbers. Optionally, if the core of the CPU cannot perform the calculation of floating-point numbers, the numerical value can be uniformly expanded by 10,000 times for operation. Then define a weight coefficient, the weight coefficient a ₀ is used to characterize the degree of correlation between the voltage data of the current resonance frequency and the voltage data of the sampling point of the initial resonance frequency at the corresponding point, which can be expressed by the formula a ₀ =(index+1)× Vision-(index+1) or a variant of this formula, where index is the serial number of the voltage data, which is a variable, and is usually used as a subscript of the voltage data N. The voltage data corresponding to the current resonant frequency can be calculated by the formula

or a variant of this formula. Among them, the index starts from 1 and increases by 1 successively, so as to obtain the voltage data of multiple points corresponding to the current resonant frequency, and form a transformed waveform file. The transformed waveform file can drive the motor to vibrate according to the current resonant frequency.

However, using the above method to generate a waveform file, because the index becomes larger and larger, the voltage data obtained by each calculation will also become larger and larger. As shown in Figure 11, the generated waveform file corresponding to the voltage data The amplitude of the data also becomes larger and larger. larger and therefore unreasonable. Therefore, we improve the above-mentioned process of spreading, and the details may refer to the following embodiments.

FIG. 12 is a flowchart of an example of a method for generating a waveform file provided by an embodiment of the present application. As shown in Figure 12, the method 1200 includes:

S1210: Obtain the initial resonance frequency and the current resonance frequency of the motor.

Specifically, the electronic device acquires the initial resonance frequency and the current resonance frequency. The current resonance frequency can be obtained by using the acquisition method of the current resonance frequency described in the foregoing embodiments. The initial resonance frequency can be the frequency corresponding to the initial waveform file. The initial waveform file is a waveform file corresponding to a specific frequency, which can generate an AC drive signal with an initial resonant frequency to drive the motor to vibrate, and can be pre-stored in an electronic device or stored in a cloud device for recall.

S1220. When the initial resonance frequency and the current resonance frequency are different, determine a third voltage amplitude according to the first voltage amplitude and the second voltage amplitude.

Usually, when the initial resonant frequency is different from the current resonant frequency, the initial waveform file needs to be converted. If the initial resonant frequency and the current resonant frequency are the same, no conversion of the waveform file is required. In the waveform file conversion process, the voltage data of each sampling point in the initial waveform file is mainly converted to generate new voltage data.

Here, the voltage data, such as amplitudes, of two adjacent sampling points of the AC drive signal corresponding to the initial resonant frequency are taken as the first voltage amplitude and the second voltage amplitude, wherein the sampling time of the first voltage amplitude is at the second Before the voltage amplitude, that is, the phase corresponding to the first voltage amplitude is smaller than the phase corresponding to the second voltage amplitude.

First define the first proportional coefficient Vision ₁ , and take the ratio of the current resonance frequency to the initial resonance frequency as the first proportional coefficient, namely Vision ₁ =F ₀ /F, where F ₀ is the current resonance frequency and F is the initial resonance frequency. Here, the second weighting coefficient a is obtained according to the first proportional coefficient according to the formula a=(index+1)×Vision ₁ -ROUNDDOWN(index+1)×Vision ₁ or the deformation of the formula, where “ROUNDDOWN” is the absolute value of The rounded function, D=ROUNDDOWN(index+1)×Vision ₁ , the first weight coefficient b=1-a. Then the third voltage amplitude can be obtained according to the formula N _index ×b+N _index+1 ×a or N _index ×(1-a)+N _index+1 ×a, or the deformation of these two formulas, where N _index is The first voltage amplitude, N _index+1 is the second voltage amplitude.

It can be understood that the phase at a sampling point in the initial waveform file can be multiplied by the first scale factor to obtain the phase of a corresponding sampling point in the current waveform file. If the phase of the interval of each sampling point is taken as a time unit, then the magnitude of the phase difference between the phase of the sampling point in the current waveform file and the phase at this sampling point in the corresponding initial waveform file can be multiplied by the first proportional coefficient according to the number of the sampling point plus one. The fractional representation of the product, ie a=(index+1)×Vision ₁ −ROUNDDOWN(index+1)×Vision ₁ . Since the phase at each sampling point is taken as a time unit, a is a normalized value. In the case of aligning the starting points of the current waveform file and the initial waveform file, a can be used to represent the first time on the time axis. The distance between the three voltage amplitudes and the first voltage amplitude. The phase difference between the phase corresponding to this sampling point in the current waveform file and the phase at the next sampling point in the corresponding initial waveform file can be represented by b=1-a to represent the distance between the third voltage amplitude and the second voltage amplitude. far and near. Through the first weighting coefficient and the second weighting coefficient, the first voltage amplitude and the second voltage amplitude can be weighted according to the distance between the third voltage amplitude and the first voltage amplitude and the second voltage amplitude to obtain The third voltage amplitude.

Taking the current resonant frequency as 232HZ and the initial resonant frequency as 235HZ as an example, as shown in Figure 13, the number axis is used as the phase corresponding to the voltage data to represent the time of the sampling point. On the 235HZ number axis, take the second sampling point and the third sampling point as an example, where 1/235 is the second sampling point, and the voltage data here is the first voltage amplitude, at 2/235 is the third sampling point, and the voltage data here is the second voltage amplitude. Then on the number axis of 232HZ, the third voltage amplitude at 1/232 can be calculated according to the formula N _index ×(1-a)+N _index+1 ×a or a deformation of the formula. As shown in Figure 13, the phase corresponding to the third voltage amplitude is greater than the phase corresponding to the first voltage amplitude and smaller than the phase corresponding to the second voltage amplitude, that is, the third voltage amplitude is away from the first sampling point of the current waveform file, That is, the time difference between the starting point of the current waveform file is greater than the time difference between the first voltage amplitude and the initial waveform file and the first sampling point, that is, the time difference between the starting point of the initial waveform file, and is smaller than the second voltage amplitude and the starting point of the initial waveform file. time difference. As shown in FIG. 13 , the abscissa of the third voltage amplitude at 1/232 corresponds to the abscissa between the first voltage amplitude and the second voltage amplitude. The difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the first voltage amplitude is taken as the first phase difference, and the difference between the phase corresponding to the third voltage amplitude and the second voltage amplitude is taken as the second phase difference. It can be seen from Fig. 13 that the sum of the first phase difference and the second phase difference can represent a time unit, so the electronic device divides the first phase difference by the sum of the first phase difference and the second phase difference as the second weight. Coefficient a, that is, using the formula a=(index+1)×Vision ₁ -ROUNDDOWN(index+1)×Vision ₁ to obtain the normalization coefficient corresponding to the phase difference corresponding to the third voltage amplitude and the first voltage amplitude, As the second weight coefficient a, a can represent the distance between the third voltage amplitude and the first voltage amplitude; the value obtained by dividing the second phase difference by the sum of the first phase difference and the second phase difference is used as the first weight For the coefficient b, the formula of b=1-a can also be used to obtain the normalized coefficient corresponding to the phase difference corresponding to the third voltage amplitude and the second voltage amplitude. As the first weight coefficient b, b can represent the third voltage How far the amplitude is from the second voltage amplitude. The product of the above-mentioned first voltage amplitude and the first weighting coefficient is taken as the first value, that is, the first value is N _index ×(1-a) or N _index ×b, and the second voltage amplitude and the second weighting coefficient are calculated. The product is taken as the second value, that is, the second value is N _index+1 ×a, where the third voltage amplitude is positively correlated with the sum of the first value and the second value, for example, the above first value N _index ×(1-a ) plus the second value N _index+1 ×a as the third voltage amplitude. Optionally, if the third voltage amplitude is the first sampling point corresponding to the current resonance frequency, the voltage data of the first sampling point of the initial waveform file is directly used, that is, the voltage data of the first sampling point is used as the corresponding current resonance frequency. The voltage data of the first sampling point can be obtained.

S1230. Generate a current waveform file according to the third voltage amplitude, wherein the current waveform file is used to generate an AC drive signal corresponding to the current resonance frequency, and the third voltage amplitude is corresponding to the current resonance frequency A sampling point of the AC drive signal.

Specifically, the electronic device calculates multiple third voltage amplitudes of the current resonance frequency point by point, thereby obtaining voltage data of multiple sampling points of the AC drive signal corresponding to the current resonance frequency, and generating the current waveform file. It should be noted that the current waveform file can generate an AC drive signal corresponding to the current resonance frequency, which is used to drive the motor to vibrate according to the resonance frequency.

In this embodiment, since the first voltage amplitude and the second voltage amplitude are the amplitudes of two adjacent sampling points of the AC drive signal corresponding to the initial resonance frequency, the phase corresponding to the third voltage amplitude is greater than the first voltage amplitude The phase corresponding to the value is smaller than the phase corresponding to the second voltage amplitude, the difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the first voltage amplitude is the first phase difference, and the phase corresponding to the third voltage amplitude is the same as the first phase difference. The difference between the phases corresponding to the two voltage amplitudes is the second phase difference, the third voltage amplitude is positively correlated with the sum of the first value and the second value, the first value is the product of the first voltage amplitude and the first weight coefficient, and the third voltage amplitude is positively correlated with the sum of the first value and the second value. The second value is the product of the second voltage amplitude and the second weight coefficient, the first weight coefficient is the value obtained by dividing the second phase difference by the sum of the first phase difference and the second phase difference, and the second weight coefficient is the first phase difference A value obtained by dividing the difference by the sum of the first phase difference and the second phase difference. Therefore, based on the above data relationship, the electronic device determines the third voltage amplitude according to the first voltage amplitude and the second voltage amplitude, and can use the relationship between the third voltage amplitude and the first voltage amplitude and the second voltage amplitude The second weighting coefficient and the first weighting coefficient of the distance degree are reasonably weighted to the first voltage amplitude and the second voltage amplitude, and a reasonable and accurate third voltage amplitude is obtained. Therefore, based on the current waveform file generated by the third voltage amplitude, it is possible to convert the initial waveform file of the initial resonant frequency into the current waveform file of the current resonant frequency, thereby generating an AC drive signal to drive the motor. The motor is calibrated by means of a circuit, and the frequency of the motor is adjusted by adding a feedback circuit, thus saving costs. At the same time, since the method does not increase the feedback circuit, the requirements for hardware are lower, and the application scenarios are more extensive.

The voltage data corresponding to the waveform file generated by the method shown in FIG. 12 can be as shown in FIG. 14 . This method does not cause the voltage data to become larger and larger, so the data is more reasonable.

Optionally, on the basis of the above embodiment, when the current resonant frequency is less than the initial resonant frequency, the number of sampling points of the obtained current waveform file will increase. For example, as shown in FIG. The number of sampling points of voltage data in a cycle is 409. When using 230HZ AC drive signal, the number of sampling points of voltage data in one cycle is 400. When using 240HZ AC drive signal, in one cycle The number of sampling points of the voltage data is 418. If the number of sampling points increases, the generated current waveform file may not be a file with a complete waveform cycle. At this time, the number of sampling points can be determined in this embodiment to obtain a current waveform file with a complete cycle. The above step S1230 One possible implementation could include:

The electronic device divides the number of voltage data in the initial waveform file Point _SUM by the number of cycles of the AC drive signal corresponding to the initial waveform file, that is, divided by the first cycle number T, as the initial waveform file belongs to one AC drive signal cycle The number of voltage data, usually an integer. That is, the first data amount T _point =Point _SUM /T, or T _point =ROUNDDOWN(Point _SUM /T). The electronic device uses the ratio of the initial resonant frequency F to the current resonant frequency F ₀ as the first transformation coefficient, and rounds the product of the first data quantity and the first transformation coefficient as the second data quantity, that is, the second data quantity T _1point is a pair of A value obtained by rounding T _point ×(F/F ₀ ). Usually T _1point =ROUNDDOWN(T _point ×(F/F ₀ )), when the product of the first data amount and the first transform coefficient is an integer, T _1point =T _point ×(F/F ₀ ). Wherein, the second data quantity is the quantity of voltage data belonging to one AC drive signal cycle in the current waveform file. The electronic device takes the ratio of the current resonant frequency F ₀ to the initial resonant frequency F as the second transformation coefficient, and takes the value obtained by rounding the product of the second transformation coefficient and the first cycle number as the second cycle number, that is, the second cycle number. The number of cycles T ₁ =ROUNDDOWN(T×(F ₀ /F)). The second number of cycles is the number of cycles corresponding to the voltage data contained in the current waveform file. After that, the electronic device generates a current waveform file according to the second data quantity T _1point , the second period quantity T ₁ and the third voltage amplitude. Specifically, the electronic device determines the number of voltage data NewPoint _SUM required by the current waveform file according to the second data quantity T _1point and the second period quantity T ₁ , for example, NewPoint _SUM =T ₁ ×T _1point . The product of the second data quantity T _1point and the second period quantity T ₁ is taken as the quantity of voltage data required by the current waveform file. The electronic device extracts the generated multiple third voltage amplitudes according to NewPoint _SUM , that is, deletes the voltage data that exceeds the number of NewPoint _SUM among the multiple third voltage amplitudes, to ensure that the AC drive signal generated by the current waveform file is The signal of the whole cycle, so as to ensure the continuity of vibration.

In one embodiment, the initial resonant frequency is 235HZ, the current resonant frequency is 232HZ, when the first cycle number T is 24, and the number of voltage data Point _SUM in the initial waveform file is 9880, so as to obtain the first data number T _point = The integer part of Point _SUM /T is 411, which is another 408 data in each cycle of the AC drive signal in the initial waveform file. Then, the electronic device calculates the second data quantity T _1point as the integer part of T _point ×(F/F ₀ ), so that T _1point =411×(235/232)=416. Then, according to the formula T ₁ =ROUNDDOWN(T×(F ₀ /F))=ROUNDDOWN(24×(232/235))=23, the electronic device obtains the second cycle number T ₁ as 23, and finally the current waveform file needs The number of voltage data NewPoint _SUM =T ₁ ×T _1point =23×416=9568. The electronic device extracts the first 9568 voltage data from the generated third voltage amplitude to generate the current waveform file, and discards the remaining data at the same time.

In this embodiment, the electronic device uses the first transformation coefficient and the second transformation coefficient that represent the proportional relationship between the current resonance frequency and the initial resonance frequency, and based on the first transformation coefficient and the second transformation coefficient, respectively, according to the first transformation coefficient of the initial waveform file. The number of cycles and the number of first data, to obtain the number of second cycles and the number of data required by the current waveform file, and further obtain the number of voltage data required by the current waveform file according to the product of the number of second cycles and the number of second data , and then extract the third voltage amplitude according to the required number of voltage data, thereby removing part of the voltage data to obtain the waveform file data of a complete cycle, so as to ensure the continuity of the shock sensation and improve the user experience.

Optionally, when the vibration mode of the motor is in the long vibration mode, for example in a ringing state, such as the vibration of an incoming call or the vibration of an alarm clock, usually the initial waveform file will not store a very long waveform. After the initial wave file changes the frequency, the motor is driven cyclically to meet the vibration duration. If the transformed current waveform file is not a complete cycle, the shock sensation is discontinuous during the cycle. Using the above embodiment, the electronic device obtains the required number of voltage data, and compares the third The voltage amplitude is extracted to obtain the current waveform file of the complete cycle. For example, as shown in Figure 16, the waveform in Figure 16 is the waveform of the complete cycle, which can ensure the waveform continuity when driving the motor cyclically. Therefore, in the case of long vibration mode , using the current waveform file to drive the motor circularly will not cause discontinuous vibration, thus improving the user experience.

In one embodiment, when the current resonant frequency is greater than the initial resonant frequency, the electronic device may acquire the number of voltage data in the initial waveform file data according to the number. Because when the current resonance frequency is greater than the initial resonance frequency, the number of third voltage amplitudes obtained after frequency conversion is less than the number of voltage data in the initial waveform file data, therefore, without changing the data length of the waveform file Next, perform zero-fill processing on the remaining vacancies, thereby obtaining an updated waveform file, so that the number of voltage data in the updated waveform file is the same as the number of voltage data in the initial waveform file. For example, the initial waveform file has 9880 data, and the obtained number of voltage data of the current waveform file is 9568, then the remaining 9880-9568=312 points are filled with zeros. By performing zero-fill processing on the current waveform file, the electronic device obtains an updated waveform file with the same number of voltage data as the initial waveform file, which can avoid changing the length of the stored data of the waveform file, thus facilitating data storage and reducing the amount of computation. At the same time, ensure the accuracy of data processing.

On the basis of the above embodiment, when the vibration mode of the motor is the short vibration mode, such as the feedback vibration of the motor when a key is touched or a call is successfully connected, the initial resonance frequency may be the minimum vibration frequency of the motor. If the frequency of the pre-stored waveform file is high and the current resonant frequency is low, the number of sampling points will increase after frequency conversion of the waveform file. If the duration is less than the duration of the short shock, the waveform may be lost. For example, as shown in Figure 17, the last waveform is obviously mutated. At this time, the initial waveform file with low frequency can be pre-stored to solve the problem. That is, if the current resonance frequency is greater than the above-mentioned minimum vibration frequency, the number of voltage data in the generated current waveform file is smaller than the number of voltage data in the initial waveform file corresponding to the minimum vibration frequency. At this time, the electronic device can perform zero-fill processing on the remaining empty bits without changing the data length of the waveform file. For example, when in short vibration mode, the initial waveform file corresponds to 230HZ, which is the minimum resonant frequency of the motor. At this time, the electronic device performs zero-fill processing on the number of voltage data in the initial waveform file with the minimum resonant frequency of the current waveform file, and obtains an updated waveform file with the same number of voltage data in the initial waveform file, thereby avoiding changing the initial waveform. The stored data length of the waveform file is convenient for data storage, which can reduce the amount of computation and ensure the accuracy of data processing. The waveform file after zero-filling can be seen in Figure 18, and there will be no waveform variation.

Examples of the method for generating a waveform file provided by the present application are described in detail above. It can be understood that, in order to realize the above-mentioned functions, the corresponding apparatuses include corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

The present application may divide the function modules of the device for generating waveform files according to the above method examples. For example, each function may be divided into each function module, or two or more functions may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that the division of modules in this application is schematic, and is only a logical function division, and other division methods may be used in actual implementation.

FIG. 19 shows a schematic structural diagram of an apparatus for generating a waveform file provided by the present application. The apparatus 1900 includes an acquisition module 1901 , a determination module 1902 , and a generation module 1903 .

The obtaining module 1901 is used to obtain the initial resonance frequency and the current resonance frequency of the motor.

A determination module 1902, configured to determine a third voltage amplitude according to a first voltage amplitude and a second voltage amplitude when the initial resonant frequency and the current resonant frequency are different, the first voltage amplitude and the The second voltage amplitude is the amplitude of two adjacent sampling points of the AC drive signal corresponding to the initial resonant frequency, wherein the phase corresponding to the third voltage amplitude is greater than the phase corresponding to the first voltage amplitude and is smaller than the phase corresponding to the second voltage amplitude, the difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the first voltage amplitude is the first phase difference, and the third voltage amplitude corresponds to The difference between the phase corresponding to the second voltage amplitude and the phase corresponding to the second voltage amplitude is the second phase difference, the third voltage amplitude is positively correlated with the sum of the first value and the second value, and the first value is the first value. The product of the voltage amplitude and the first weighting coefficient, the second value is the product of the second voltage amplitude and the second weighting coefficient, and the first weighting coefficient is the second phase difference divided by the first A value obtained by the sum of a phase difference and the second phase difference, and the second weight coefficient is a value obtained by dividing the first phase difference by the sum of the first phase difference and the second phase difference.

A generating module 1903, configured to generate a current waveform file according to the third voltage amplitude, wherein the current waveform file is used to generate an AC drive signal corresponding to the current resonance frequency, and the third voltage amplitude is the The amplitude of one sampling point of the AC drive signal corresponding to the current resonant frequency.

Optionally, when the current resonant frequency is less than the initial resonant frequency, the generating module 1903 is specifically configured to: obtain a first data quantity, where the first data quantity is a voltage belonging to one AC drive signal cycle in the initial waveform file The number of data, the initial waveform file is the waveform file corresponding to the initial resonance frequency; the second data amount is determined according to the first data amount and the first transformation coefficient, and the first transformation coefficient is the current resonance frequency The ratio of the frequency to the initial resonant frequency, the initial resonant frequency is the frequency of the AC drive signal corresponding to the initial waveform file, and the second data quantity is the product of the first data quantity and the first transformation coefficient The value obtained after rounding; obtaining the first cycle number, which is the number of cycles of the AC drive signal corresponding to the initial waveform file; determining the first cycle number according to the first cycle number and the second transformation coefficient; The number of two cycles, the second number of cycles is a value obtained by rounding the product of the first number of cycles and the second transformation coefficient, and the second transformation coefficient is the initial resonance frequency and the The ratio of the current resonance frequency; the current waveform file is generated according to the second data quantity, the second period quantity and the third voltage amplitude, and the second data quantity is one of the current waveform files. The number of voltage data in the AC drive signal cycle, and the second number of cycles is the number of cycles corresponding to the voltage data contained in the current waveform file.

Optionally, the vibration mode of the motor is a long vibration mode.

Optionally, when the current resonant frequency is greater than the initial resonant frequency, the generation module 1903 is further configured to: perform zero-fill processing on the current waveform file to obtain an updated waveform file, the voltage data in the updated waveform file. The number of is the same as the number of voltage data in the initial waveform file, and the initial waveform file is the waveform file corresponding to the initial resonance frequency.

Optionally, the vibration mode of the motor is a short vibration mode, and the initial resonance frequency is a minimum vibration frequency of the motor.

Optionally, the obtaining module 1901 is specifically configured to: obtain multiple acceleration data corresponding to each AC drive signal when a plurality of AC drive signals drive the motor to vibrate, and the acceleration data is used to represent the magnitude of the acceleration of the motor during vibration, The frequencies of the plurality of AC drive signals are distributed within the driving frequency range of the motor; Average acceleration; determining the current resonance frequency according to the maximum average acceleration among the plurality of average accelerations of the plurality of AC drive signals, wherein the current resonance frequency is the frequency of the AC drive signal corresponding to the maximum average acceleration.

Optionally, the obtaining module 1901 is specifically configured to: obtain the peak-to-peak value of the acceleration data corresponding to each of the plurality of AC drive signals; and determine each AC drive signal in the plurality of AC drive signals according to the peak-to-peak value. The average acceleration corresponding to the drive signal.

Optionally, the peak-to-peak value is data obtained by removing the overshoot value from the first peak-to-peak value, and/or the peak-to-peak value is obtained by down-sampling the first peak-to-peak value according to a preset sampling rate. data; the first peak-to-peak value is the original peak-to-peak value of the acceleration data corresponding to each of the plurality of AC drive signals.

For the specific manner in which the apparatus 1900 performs the method for generating a waveform file and the beneficial effects produced, reference may be made to the relevant descriptions in the method embodiments.

An embodiment of the present application further provides an electronic device, including the above-mentioned processor. The electronic device provided in this embodiment may be the terminal device 100 shown in FIG. 1 , and is configured to execute the foregoing method for generating a waveform file. In the case of using an integrated unit, the terminal device may include a processing module, a storage module, and a communication module. The processing module may be used to control and manage the actions of the terminal device, for example, may be used to support the terminal device to perform steps performed by the display unit, the detection unit, and the processing unit. The storage module can be used to support the terminal device to execute stored program codes and data. The communication module can be used to support the communication between the terminal device and other devices.

The processing module may be a processor or a controller. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination comprising one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, and the like. The storage module may be a memory. The communication module may specifically be a device that interacts with other terminal devices, such as a radio frequency circuit, a Bluetooth chip, and a Wi-Fi chip.

In one embodiment, when the processing module is a processor and the storage module is a memory, the computer device involved in this embodiment may be a terminal device having the structure shown in FIG. 1 .

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the processor is made to execute the description in any of the foregoing embodiments. method for generating wave files.

Embodiments of the present application further provide a computer program product, which, when the computer program product runs on a computer, causes the computer to execute the above-mentioned relevant steps, so as to realize the method for generating a waveform file in the above-mentioned embodiment.

Wherein, the electronic device, computer-readable storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding method provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the above-provided method. The beneficial effects in the corresponding method will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or May be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (which may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk and other media that can store program codes.

The above content is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (18)

1. A method of generating a waveform file, comprising:

acquiring an initial resonant frequency and a current resonant frequency of a motor;

determining a third voltage amplitude according to a first voltage amplitude and a second voltage amplitude when the initial resonant frequency is different from the current resonant frequency, wherein the first voltage amplitude and the second voltage amplitude are amplitudes of two adjacent sampling points of the alternating current driving signal corresponding to the initial resonant frequency, a phase corresponding to the third voltage amplitude is larger than a phase corresponding to the first voltage amplitude and smaller than a phase corresponding to the second voltage amplitude, a difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the first voltage amplitude is a first phase difference, a difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the second voltage amplitude is a second phase difference, the third voltage amplitude is positively correlated with a sum of a first value and a second value, and the first value is a product of the first voltage amplitude and a first weight coefficient, the second value is a product of the second voltage amplitude and a second weight coefficient, the first weight coefficient is a value obtained by dividing the second phase difference by a sum of the first phase difference and the second phase difference, and the second weight coefficient is a value obtained by dividing the first phase difference by a sum of the first phase difference and the second phase difference;

and generating a current waveform file according to the third voltage amplitude, wherein the current waveform file is used for generating the alternating current driving signal corresponding to the current resonance frequency, and the third voltage amplitude is the amplitude of one sampling point of the alternating current driving signal corresponding to the current resonance frequency.

2. The method of claim 1, wherein generating a current waveform file from the third voltage amplitude when the current resonant frequency is less than the initial resonant frequency comprises:

acquiring a first data quantity, wherein the first data quantity is the number of voltage data belonging to one alternating current driving signal period in an initial waveform file, and the initial waveform file is a waveform file corresponding to the initial resonant frequency;

determining a second data quantity according to the first data quantity and a first transformation coefficient, wherein the first transformation coefficient is a ratio of the current resonance frequency to an initial resonance frequency, the initial resonance frequency is a frequency of an alternating current driving signal corresponding to the initial waveform file, and the second data quantity is a value obtained by rounding a product of the first data quantity and the first transformation coefficient;

acquiring a first cycle number, wherein the first cycle number is the number of cycles of the alternating current driving signal corresponding to the initial waveform file;

determining a second period number according to the first period number and a second transformation coefficient, wherein the second period number is a value obtained after rounding processing of a product of the first period number and the second transformation coefficient, and the second transformation coefficient is a ratio of the initial resonant frequency to the current resonant frequency;

and generating the current waveform file according to the second data quantity, the second period quantity and the third voltage amplitude, wherein the second data quantity is the number of voltage data belonging to one period of the alternating current driving signal in the current waveform file, and the second period quantity is the period quantity corresponding to the voltage data contained in the current waveform file.

3. The method of claim 2, wherein the vibration mode of the motor is a long vibration mode.

4. The method of claim 1, further comprising:

and when the current resonance frequency is greater than the initial resonance frequency, performing zero filling processing on the current waveform file to obtain an updated waveform file, wherein the number of the voltage data in the updated waveform file is the same as that in the initial waveform file, and the initial waveform file is a waveform file corresponding to the initial resonance frequency.

5. The method of claim 4, wherein the vibration mode of the motor is a short vibration mode and the initial resonant frequency is a minimum vibration frequency of the motor.

6. The method of claim 1, wherein the obtaining the initial resonant frequency and the current resonant frequency of the motor comprises:

acquiring a plurality of acceleration data corresponding to each alternating current driving signal when the motor is driven by the plurality of alternating current driving signals to vibrate, wherein the acceleration data are used for representing the acceleration of the motor when the motor vibrates, and the frequency of the plurality of alternating current driving signals is distributed in the driving frequency range of the motor;

determining an average acceleration corresponding to each AC driving signal in the plurality of AC driving signals according to a plurality of acceleration data of the plurality of AC driving signals;

and determining the current resonance frequency according to the maximum average acceleration in the average accelerations of the alternating current driving signals, wherein the current resonance frequency is the frequency of the alternating current driving signal corresponding to the maximum average acceleration.

7. The method of claim 6, wherein determining an average acceleration for each AC drive signal in the plurality of AC drive signals based on the plurality of acceleration data for the plurality of AC drive signals comprises:

acquiring a peak-to-peak value of acceleration data corresponding to each AC driving signal in the plurality of AC driving signals;

and determining the average acceleration corresponding to each AC driving signal in the plurality of AC driving signals according to the peak-to-peak value.

8. The method of claim 7,

the peak-to-peak value is data obtained by removing an overshoot value from a first peak-to-peak value, and/or the peak-to-peak value is data obtained by down-sampling the first peak-to-peak value according to a preset sampling rate;

the first peak-to-peak value is an original peak-to-peak value of acceleration data corresponding to each of the plurality of alternating current driving signals.

9. An apparatus for generating a waveform file, comprising:

the acquisition module is used for acquiring the initial resonant frequency and the current resonant frequency of the motor;

a determining module, configured to determine a third voltage amplitude according to a first voltage amplitude and a second voltage amplitude when the initial resonant frequency is different from the current resonant frequency, where the first voltage amplitude and the second voltage amplitude are amplitudes of two adjacent sampling points of the ac driving signal corresponding to the initial resonant frequency, a phase corresponding to the third voltage amplitude is greater than a phase corresponding to the first voltage amplitude and smaller than a phase corresponding to the second voltage amplitude, a difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the first voltage amplitude is a first phase difference, a difference between the phase corresponding to the third voltage amplitude and the phase corresponding to the second voltage amplitude is a second phase difference, the third voltage amplitude is positively correlated to a sum of a first value and a second value, and the first value is a product of the first voltage amplitude and a first weight coefficient, the second value is a product of the second voltage amplitude and a second weight coefficient, the first weight coefficient is a value obtained by dividing the second phase difference by a sum of the first phase difference and the second phase difference, and the second weight coefficient is a value obtained by dividing the first phase difference by a sum of the first phase difference and the second phase difference;

and the generating module is configured to generate a current waveform file according to the third voltage amplitude, where the current waveform file is used to generate the ac driving signal corresponding to the current resonance frequency, and the third voltage amplitude is an amplitude of a sampling point of the ac driving signal corresponding to the current resonance frequency.

10. The apparatus of claim 9, wherein when the current resonant frequency is less than the initial resonant frequency, the generating module is specifically configured to:

acquiring a first data quantity, wherein the first data quantity is the number of voltage data belonging to one alternating current driving signal period in an initial waveform file, and the initial waveform file is a waveform file corresponding to the initial resonant frequency;

determining a second data quantity according to the first data quantity and a first transformation coefficient, wherein the first transformation coefficient is a ratio of the current resonance frequency to an initial resonance frequency, the initial resonance frequency is a frequency of an alternating current driving signal corresponding to the initial waveform file, and the second data quantity is a value obtained by rounding a product of the first data quantity and the first transformation coefficient;

acquiring a first cycle number, wherein the first cycle number is the number of cycles of the alternating current driving signal corresponding to the initial waveform file;

determining a second period number according to the first period number and a second transformation coefficient, wherein the second period number is a value obtained after rounding processing of a product of the first period number and the second transformation coefficient, and the second transformation coefficient is a ratio of the initial resonant frequency to the current resonant frequency;

and generating the current waveform file according to the second data quantity, the second period quantity and the third voltage amplitude, wherein the second data quantity is the number of voltage data belonging to one period of the alternating current driving signal in the current waveform file, and the second period quantity is the period quantity corresponding to the voltage data contained in the current waveform file.

11. The apparatus of claim 10, wherein the vibration mode of the motor is a long vibration mode.

12. The apparatus of claim 9, wherein when the current resonant frequency is greater than the initial resonant frequency, the generating module is further configured to:

and performing zero filling processing on the current waveform file to obtain an updated waveform file, wherein the number of the voltage data in the updated waveform file is the same as that of the voltage data in an initial waveform file, and the initial waveform file is a waveform file corresponding to the initial resonant frequency.

13. The apparatus of claim 12, wherein the vibration mode of the motor is a short vibration mode and the initial resonant frequency is a minimum vibration frequency of the motor.

14. The apparatus of claim 9, wherein the obtaining module is specifically configured to:

acquiring a plurality of acceleration data corresponding to each alternating current driving signal when the motor is driven by the plurality of alternating current driving signals to vibrate, wherein the acceleration data are used for representing the acceleration of the motor when the motor vibrates, and the frequency of the plurality of alternating current driving signals is distributed in the driving frequency range of the motor;

determining an average acceleration corresponding to each AC driving signal in the plurality of AC driving signals according to a plurality of acceleration data of the plurality of AC driving signals;

and determining the current resonance frequency according to the maximum average acceleration in the average accelerations of the alternating current driving signals, wherein the current resonance frequency is the frequency of the alternating current driving signal corresponding to the maximum average acceleration.

15. The apparatus of claim 14, wherein the obtaining module is specifically configured to:

acquiring a peak-to-peak value of acceleration data corresponding to each alternating current driving signal in the plurality of alternating current driving signals;

and determining the average acceleration corresponding to each AC driving signal in the plurality of AC driving signals according to the peak-to-peak value.

16. The apparatus of claim 15, wherein the peak-to-peak value is obtained by removing an overshoot value from a first peak-to-peak value, and/or the peak-to-peak value is obtained by down-sampling the first peak-to-peak value according to a preset sampling rate;

the first peak-to-peak value is an original peak-to-peak value of acceleration data corresponding to each of the plurality of alternating current driving signals.

17. An electronic device, comprising: a processor, a memory, and an interface;

the processor, memory and interface cooperate with one another, the processor being configured to perform the method of any of claims 1 to 8.

18. A computer-readable storage medium, in which a computer program is stored which, when executed by a processor, causes the processor to carry out the method of any one of claims 1 to 8.

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