CN114543976A - Linear motor testing method and device, electronic equipment and medium - Google Patents

Abstract

The disclosure relates to a test method of a linear motor, which comprises the following steps: based on the received operation instruction, sending a test signal corresponding to the operation instruction to the linear motor; acquiring vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of a plurality of directions of the linear motor perpendicular to each other; performing signal analysis on the vibration information to determine a vibration waveform; and determining that the linear motor is qualified according to the vibration waveform and the prestored vibration design parameters. The vibration information of the linear motor in multiple directions is acquired and analyzed to determine the vibration waveform, and whether the linear motor is qualified or not is determined according to the vibration waveform and the pre-stored vibration design parameters, so that the abnormal linear motor is analyzed and rejected in time, the good performance of the outgoing linear motor is ensured, and the yield is improved.

Description

Test method, device, electronic device and medium for a linear motor

technical field

The present disclosure relates to the technical field, and in particular, to a testing method, device, electronic device and medium of a linear motor.

Background technique

With the development of science and technology, electronic products such as mobile phones are becoming more and more intelligent, bringing users a better experience. For example, touch screens in electronic products. The user only needs to touch the icon or text on the screen to realize the operation of the electronic product, which makes the human-computer interaction more straightforward. Among them, the touch screen interface promotes the application of haptic feedback technology in electronic products.

Haptic feedback technology can reproduce the tactile sensation for the user through a series of actions such as force and vibration. This mechanical stimulus can enhance the sense of manipulation of machinery and equipment. With the help of haptic feedback technology, electronic product manufacturers can set different personalized haptic feedback according to different application scenarios, so as to receive different haptic experiences when users issue different commands, which can make users and electronic products produce more haptic feedback. deep interaction.

Among them, the vibration in the electronic device is an epidermal tactile feedback technology, which can notify the user that the command issued by the electronic device has been received by the electronic device through the vibration, and can also send a reminder message to the user through the vibration. For example, when touch feedback is set in an electronic product and the user opens the target application, vibration is used as the haptic feedback to remind the user to successfully click on the target application. For another example, when the user is in a game scene, in order to enhance the game effect, a unique haptic feedback effect can be customized to enhance the user experience and reconstruct the "mechanical" touch intuitively and without error.

The motor is the core device to realize the haptic feedback technology, and the performance of the motor directly affects the effect of the haptic feedback technology applied in electronic products. Therefore, how to conduct all-round and multi-angle tests on the performance of the motor to ensure that the used motor has high quality is an urgent problem to be solved.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art, the present disclosure provides a testing method, device, electronic device and medium for a linear motor.

According to a first aspect of the embodiments of the present disclosure, there is provided a test method for a linear motor, the test method comprising:

Based on the received operation instruction, sending a test signal corresponding to the operation instruction to the linear motor;

acquiring vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of the linear motor in multiple directions perpendicular to each other;

Perform signal analysis on the vibration information to determine the vibration waveform;

According to the vibration waveform and the pre-stored vibration design parameters, it is determined that the linear motor is qualified.

Optionally, the test method also includes:

Acquiring audio information generated by the linear motor based on the test signal, wherein the audio information includes audio sub-information in multiple mutually perpendicular directions of the linear motor.

Perform signal analysis on the audio information to determine the audio frequency spectrum;

According to the audio frequency spectrum and the pre-stored audio design parameters, it is determined that the linear motor is qualified.

Optionally, performing signal analysis on the audio information to determine an audio frequency spectrum includes:

The audio information is expanded from 0 to 30 KHz to determine the audio frequency spectrum.

Optionally, the sending a test signal corresponding to the operation instruction to the linear motor based on the received operation instruction includes:

Based on the received operation command, a frequency sweep signal is sent to the linear motor.

Optionally, the sending a test signal corresponding to the operation instruction to the linear motor based on the received operation instruction includes:

Based on the received operation command, a sine wave signal is sent to the linear motor.

Optionally, performing signal analysis on the vibration information to determine a vibration waveform, including:

The vibration information is stabilized by using the empirical mode decomposition method to determine the vibration waveform.

Optionally, the vibration information includes long vibration information and/or short vibration information.

According to a second aspect of the embodiments of the present disclosure, there is provided a test device for a linear motor, the test device comprising:

a sending module, configured to send a test signal corresponding to the operation instruction to the linear motor based on the received operation instruction;

an acquisition module, configured to acquire vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of the linear motor in multiple directions perpendicular to each other;

a first determination module, configured to perform signal analysis on the vibration information to determine a vibration waveform;

The second determination module is configured to determine that the linear motor is qualified according to the vibration waveform and the pre-stored vibration design parameters.

Optionally, the test device further includes:

The acquiring module is further configured to acquire audio information generated by the linear motor based on the test signal, wherein the audio information includes audio sub-information of the linear motor in multiple directions perpendicular to each other.

The first determining module is further configured to perform signal analysis on the audio information to determine an audio frequency spectrum;

The second determining module is further configured to determine that the linear motor is qualified according to the audio frequency spectrum and pre-stored audio design parameters.

Optionally, the first determining module is specifically configured to:

The audio information is expanded from 0 to 30 KHz to determine the audio frequency spectrum.

Optionally, the sending module is specifically used for:

Based on the received operation command, a frequency sweep signal is sent to the linear motor.

Optionally, the sending module is specifically used for:

Based on the received operation command, a sine wave signal is sent to the linear motor.

Optionally, the first determining module is specifically configured to:

The vibration information is stabilized by using the empirical mode decomposition method to determine the vibration waveform.

Optionally, the vibration information includes long vibration information and/or short vibration information.

According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, including:

a processor, a memory for storing executable instructions for the processor;

Wherein, the processor is configured to perform the method of testing a linear motor as described above.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a non-transitory processor-readable storage medium, which, when the instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to execute the above-mentioned Test methods for linear motors.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: by acquiring the vibration information of the linear motor in multiple directions, analyzing and determining the vibration waveform, and then determining whether the linear motor is qualified according to the vibration waveform and the pre-stored vibration design parameters , so as to analyze and eliminate abnormal linear motors in time to ensure that the performance of the linear motors that leave the factory is good and improve the yield.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a flow chart of a method for testing a linear motor according to an exemplary embodiment.

FIG. 2 is a flow chart of a method for testing a linear motor according to an exemplary embodiment.

FIG. 3 is a flowchart of a method for testing a linear motor according to an exemplary embodiment.

FIG. 4 is a flow chart of a method for testing a linear motor according to an exemplary embodiment.

FIG. 5 is a flow chart of a method for testing a linear motor according to an exemplary embodiment.

FIG. 6 is a flow chart of a method for testing a linear motor according to an exemplary embodiment.

FIG. 7 is a block diagram of a testing device for a linear motor according to an exemplary embodiment.

FIG. 8 is a structural diagram of a testing system of a linear motor according to an exemplary embodiment.

FIG. 9 is an audio spectrogram according to an exemplary embodiment.

FIG. 10 is a time domain diagram of vibration information according to an exemplary embodiment.

FIG. 11 is a time domain diagram of vibration information according to an exemplary embodiment.

FIG. 12 is a time domain diagram of vibration information according to an exemplary embodiment.

FIG. 13 is a time domain diagram of vibration information according to an exemplary embodiment.

FIG. 14 shows several IMF diagrams obtained by decomposing vibration information from empirical modes according to an exemplary embodiment.

FIG. 15 is a block diagram of an electronic device according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numerals in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

In the related art, motors used in electronic products include a transverse linear motor (X-axis linear motor) and a longitudinal linear motor (Z-axis linear motor).

Among them, the longitudinal linear motor is a plane motion perpendicular to the electronic product, limited by the thickness of the electronic product, the available space left for the longitudinal linear motor is very small, which in turn affects the vibration effect of the longitudinal linear motor. The horizontal linear motor moves parallel to the plane of the electronic product and is not limited by the thickness of the electronic product. The initial vibration power is stronger, the response is faster, and the vibration effect is better. Therefore, compared with vertical linear motors, horizontal linear motors are more popular with major electronic product manufacturers.

The transverse linear motor is mainly used in high-end products in the industry, and its structure is precise and expensive. Therefore, before the linear motor leaves the factory, it needs to be tested to confirm the quality of the linear motor to ensure that the good products are put into the market.

In the testing method in the related art, only the vibration information of one surface of the linear motor along the movement direction is tested. The vibration information includes the highest value of the vibration intensity of the current test surface. However, linear motors have multiple directions, and surfaces in different directions have their own vibration modes. Only using a single index to measure the quality of linear motors cannot confirm the quality of linear motors. Only by measuring the highest value of the vibration intensity in a single direction of the linear motor, it is impossible to know whether there is any abnormality in the vibration process of the linear motor, resulting in inaccurate test results.

To solve the above problems, the present disclosure proposes a testing method for a linear motor. The test method includes, based on the received operation instruction, sending a test signal corresponding to the operation instruction to the linear motor. The vibration information generated by the linear motor based on the test signal is acquired, wherein the vibration information includes vibrator information of the linear motor in multiple directions perpendicular to each other. Perform signal analysis on the vibration information to determine the vibration waveform. According to the vibration waveform and the pre-stored vibration design parameters, it is determined that the linear motor is qualified. Using the method of the present disclosure, the vibration information of the linear motor in multiple directions can be tested, and the vibration waveform can be determined by analyzing it, and then according to the vibration waveform and the pre-stored vibration design parameters, it can be determined whether the linear motor is qualified, so that the abnormal linear motor can be checked in time. Analysis and elimination to ensure the good performance of the linear motor that leaves the factory and improve the yield. At the same time, the performance of the linear motor after passing the test is excellent, which avoids problems such as bad motors being used in electronic products, reducing the service life of electronic products, and increasing maintenance costs.

In an exemplary embodiment, this embodiment provides a test method for a linear motor, the test method is used in the test system of a linear motor as shown in FIG. 8 , and is applied in an electronic device, for example, the electronic device may computer etc.

The test system includes a linear motor 1, a vibration sensor 2, an electronic device 3 and a tool (not shown in the figure). The linear motor 1 is arranged in the tool, and the tool is electrically connected to the processor 31 of the electronic device 3. The processing of the electronic device 3 The controller 31 controls the rotation of the tool, so that the test surface of the linear motor 1 in the tool and the vibration sensor 2 can be set correspondingly, so that the vibration sensor 2 can collect the vibration information of the linear motor 1 in different directions. Wherein, the vibration sensor 2 and the processor 31 of the electronic device 3 may be connected in communication, so as to feed back the collected vibration information to the processor 31 of the electronic device 3 .

The test system further includes an audio collection device 4, and the audio collection device 4 is connected in communication with the processor 31 of the electronic device 3, so as to feed back the collected audio information to the processor 31 of the electronic device 3. Among them, in order to further ensure the accuracy of the test results, the method in this embodiment is performed in a silent chamber (not shown in the figure), for example, the audio collection device 4, the tooling and the linear motor 1 are placed in the silent chamber. The mute chamber can suppress the test environment below 35dBa to reduce the interference of the environment to the test process and ensure the accuracy of the test results.

In an exemplary embodiment, as shown in FIG. 1 , the testing method in this embodiment includes:

S110. Based on the received operation instruction, send a test signal corresponding to the operation instruction to the linear motor.

In this step, the operation instruction is, for example, a test instruction triggered by a tester. The tester starts to test the linear motor by, for example, touching a physical button on the electronic device or touching a virtual button on the electronic device to start the test program.

Wherein, the test procedure is only exemplary for explaining the present embodiment, and does not limit the present application. The way to start the test of the linear motor may also be through a third-party application program, etc., which is not specifically limited here.

The processor of the electronic device receives the test instruction triggered by the tester, and based on the instruction, generates a matching test signal, the processor of the electronic device sends the test signal to the drive chip of the linear motor, and the drive chip of the linear motor receives the test signal. To the test signal, the linear motor moves and generates vibration, and the vibration generated by the linear motor corresponds to the test signal it receives. The test signal may be regarded as a drive signal, and the drive signal may be, for example, a voltage signal, a current signal, or the like.

S120. Acquire vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of multiple mutually perpendicular directions of the linear motor.

In this step, after the driving chip of the linear motor receives the test signal sent by the processor of the electronic device, the linear motor starts to move based on the test signal. During the movement of the linear motor, the linear motor will vibrate, and the processor of the electronic device obtains the vibration information of the linear motor when it vibrates.

Wherein, the vibration information includes vibrator information in multiple directions perpendicular to each other of the linear motor. For example, the linear motor has a cuboid structure. The processor of the electronic device obtains the vibrator information of the three mutually perpendicular surfaces of the linear motor, or the vibrator information of the two mutually perpendicular surfaces of the linear motor, or , the vibrator information of the six mutually perpendicular planes of the linear motor. By collecting the vibrator information in different directions, the accuracy of the test results can be improved.

In an example, the vibrator information of the linear motor 1 can be collected by the vibration sensor 2, for example, the vibration sensor 2 establishes data transmission with the processor 31 of the electronic device 3, and the vibration sensor 2 will collect the vibrator information of the linear motor 1. It is fed back to the processor 31 of the electronic device 3, and the processor 31 of the electronic device 3 stores it. The frequency range that the vibration sensor 2 can detect is 10Hz-20kHz.

For example, the vibration sensor 2 is attached to the central axis of one of the planes extending along the first direction of the linear motor 1 (refer to the X-axis direction shown in FIG. 8 ). Of course, the specific installation position can be determined according to the actual situation, as long as the collection The vibration information generated by the surface can be obtained. The drive chip of the linear motor 1 drives the linear motor 1 to move according to the test information it receives, and the vibration sensor 2 collects the vibrator information of the linear motor 1 in the first direction, and feeds back the vibrator information to the processor 31 of the electronic device 3 , so that the processor 31 of the electronic device 3 can store and analyze it. Wherein, the vibrator information may be, for example, the extreme value of the vibration amount generated by the linear motor 1 based on the vibration within a predetermined period of time, or, within a predetermined period of time, all vibration information.

Of course, it can be understood that when the vibration sensor 2 collects the vibrator information of the linear motor 1 along the second direction (refer to the Y-axis direction shown in FIG. 8 ), the vibration sensor 2 is attached to the second along the linear motor 1 . One of the faces that extends in the direction. When the vibration sensor 2 collects the vibrator information of the linear motor 1 along the third direction (refer to the Z-axis direction shown in FIG. 8 ), the vibration sensor 2 is attached to one of the surfaces extending along the third direction of the linear motor 1 . . The manner in which the vibration sensor 2 collects the vibrator information of the second direction of the linear motor 1 and the third direction of the linear motor 1 is the same as the manner of collecting the first direction of the linear motor 1 above, which will not be repeated here.

In this step, the vibration of the linear motor includes a long vibration mode and a short vibration mode. The vibration information also includes long vibration information and short vibration information.

Among them, the long vibration mode of the linear motor is, for example, a vibration mode generated by the linear motor based on the test signal. For example, the test signal can be a voltage signal with a frequency of 170Hz and an intensity of 1.2V. The vibration generated under this test signal is a long Vibration mode. The vibration information in the long vibration mode is the long vibration information.

The short vibration mode of the linear motor is a special vibration mode of the linear motor, which is completed within a predetermined time period, such as 5ms-20ms. At this time, the test signal for driving the linear motor is a voltage signal of 9V, and there is no concept of frequency. The vibration generated under this test signal is a short vibration mode. The vibration information in the short vibration mode is short vibration information.

By simulating the long vibration mode and short vibration mode of the linear motor, the vibrator information of each perpendicular surface of the vibration motor is collected respectively, and the test results of various modes are collected to ensure the diversity and accuracy of the test results.

S130. Perform signal analysis on the vibration information to determine a vibration waveform.

In step S130, the processor of the electronic device may analyze the stored vibration information by using, for example, an empirical mode decomposition method. The processor of the electronic device displays the analysis results in the form of a graph, records the correspondence between the predetermined time step and the extreme value of the vibration amount generated by the vibration of the linear motor, and then determines the vibration waveform as shown in Figure 10. .

S140, according to the vibration waveform and the pre-stored vibration design parameters, determine that the linear motor is qualified.

In step S140, the processor of the electronic device compares the vibration waveform of the linear motor with the pre-stored vibration design parameters of the linear motor, and then determines whether the quality of the linear motor is qualified.

If the processor of the electronic device determines that the error between the vibration waveform of the linear motor and its pre-stored vibration design parameters is within the threshold range, it means that the linear motor has good running performance and can be put into use in the market. Or, if the processor of the electronic device determines that the error between the vibration waveform of the linear motor and the pre-stored vibration design parameters is outside the threshold range, it means that the linear motor is abnormally running. Maintenance personnel need to debug or repair the abnormal linear motor until the linear motor runs normally before it can be put into the market.

The method in this embodiment determines the vibration waveform in each direction by collecting the vibrator information of the linear motor in multiple directions perpendicular to each other, and performing signal analysis on the vibrator information in each direction respectively. Compare the vibration waveform with the design parameters of the linear motor to determine whether the linear motor is acceptable. The entire test is simple and accurate, ensuring that only linear motors with good performance can leave the factory and be put on the market.

At the same time, by testing the linear motor, it is possible to determine the operation of the designed motor during use, and then provide data support for subsequent research and development to develop a linear motor with better performance.

In an exemplary embodiment, as shown in Figure 2, the testing method in this embodiment includes:

S210. Based on the received operation instruction, send a test signal corresponding to the operation instruction to the linear motor.

The method for sending the test signal in this step is exactly the same as the method involved in step S110 in the foregoing embodiment, and details are not described herein again.

S220. Acquire audio information generated by the linear motor based on the test signal, where the audio information includes audio sub-information of the linear motor in multiple directions perpendicular to each other.

In this step, after the driving chip of the linear motor receives the test signal sent by the processor of the electronic device, the linear motor starts to move based on the test signal. During the movement of the linear motor, the linear motor will vibrate. Based on the vibration of the linear motor, audio information is generated, and the processor of the electronic device acquires the audio information generated by the linear motor when it vibrates.

The audio information includes audio sub-information in multiple mutually perpendicular directions of the linear motor. For example, the linear motor has a cuboid structure. What the processor of the electronic device obtains is the audio sub-information of the three mutually perpendicular planes of the linear motor, or the audio sub-information of the two mutually perpendicular planes of the linear motor, or , the audio sub-information of the six mutually perpendicular faces of the linear motor. By collecting audio sub-information in different directions, the linear motor is fully tested to improve the accuracy of the test results.

In an example, the audio sub-information of the linear motor 1 may be collected by the audio collection device 4 (refer to FIG. 8 ). The audio collection device 4 establishes data transmission with the processor 31 of the electronic device 3, and the audio collection device 4 feeds back the collected audio sub-information of the linear motor 1 to the processor 31 of the electronic device 3, and the processor 31 of the electronic device 3 feeds back the collected audio sub-information of the linear motor 1. to store. The audio collection device 4 may be, for example, a microphone, and the frequency bandwidth that the microphone can collect is 50 Hz-30 kHz.

The audio collection device 4 is arranged corresponding to the test surface of the linear motor 1 , and there is a predetermined distance between the audio collection device 4 and the tooling for fixing the linear motor 1 . The predetermined distance is, for example, 0.75 cm-2 cm, so that the audio sub-information of the linear motor 1 can be accurately collected by the audio collection device 4 . Of course, the predetermined distance is not limited to the above-mentioned values, and the predetermined distance is specifically determined according to the actual situation, as long as the audio information generated by the surface can be guaranteed to be collected. The drive chip of the linear motor 1 drives the linear motor 1 to move according to the test information it receives, and the audio collection device 4 collects the audio sub-information on the test surface of the linear motor 1, and feeds the audio sub-information back to the processor 31 of the electronic device 3, This makes it possible for the processor 31 of the electronic device 3 to store and analyze it. The audio sub-information may be, for example, the loudness of the noise generated when the linear motor 1 vibrates within different frequency intensities.

S230. Perform signal analysis on the audio information to determine an audio frequency spectrum.

In step S230, the processor of the electronic device may, for example, analyze the stored audio information by using a Fourier transform method. The processor of the electronic device displays the analysis results in the form of a graph, records the corresponding relationship between the intensity of different frequencies and the loudness of the noise generated by the vibration of the linear motor, and then determines the audio spectrogram as shown in Figure 9.

S240. Determine that the linear motor is qualified according to the audio frequency spectrum and the pre-stored audio design parameters.

In step S240, the processor of the electronic device compares the audio frequency spectrum generated by the vibration of the linear motor with the pre-stored design parameters of the linear motor, and then determines whether the quality of the linear motor is qualified.

If the processor of the electronic device determines that the error between the audio frequency spectrum of the linear motor and its pre-stored audio design parameters is within the threshold range, it means that the linear motor has good noise loudness and can be put into use in the market. Or, if the processor of the electronic device determines that the error between the audio frequency spectrum of the linear motor and its pre-stored audio design parameters is outside the threshold range, it means that the noise loudness of the linear motor is abnormal. Maintenance personnel need to debug or repair the abnormal linear motor until the noise loudness of the linear motor is controlled within the design range before it can be put into the market.

The method in this embodiment determines the audio frequency spectrum in each direction by collecting audio sub-information in multiple mutually perpendicular directions of the linear motor, and separately performing signal analysis on the audio sub-information in each direction. Compare the noise loudness of the linear motor with the design parameters of the linear motor at different frequency intensities to determine whether the noise loudness of the linear motor meets the standard. All-round testing of the linear motor ensures the accuracy of the test results of the linear motor.

Here, it should be noted that the above two embodiments can be performed at the same time, that is, steps S110 to S140 and steps S210 to 240 are simultaneously performed, so as to simultaneously perform the physical vibration and audio generated by the linear motor during the vibration process. Collect and analyze, improve test speed, and improve test comprehensiveness.

In an exemplary embodiment, as shown in Figure 3, the testing method in this embodiment includes:

S310. Based on the received operation instruction, send a test signal corresponding to the operation instruction to the linear motor.

S320. Acquire audio information generated by the linear motor based on the test signal, where the audio information includes audio sub-information of the linear motor in multiple directions perpendicular to each other.

S330. Expand the audio information at 0 to 30 KHz to determine the audio frequency spectrum.

In this step, the vibration information is converted into audio information by means of Fourier transform, and an audio spectrogram as shown in FIG. 9 is determined.

Among them, as shown in the audio spectrogram shown in Figure 9, it can be seen that when the linear motor is at a vibration frequency intensity above 2kHz, its noise loudness is at least 80dBa lower than the noise loudness of the initial vibration frequency intensity, and the noise loudness is less than 45dBa .

S340. Determine that the linear motor is qualified according to the audio frequency spectrum and the pre-stored audio design parameters.

In the method in this embodiment, different vibration modes exist in different directions of the linear motor, and the audio frequency spectrum is determined by collecting the audio sub-information in different directions of the linear motor when it vibrates. If the audio frequency spectrum is abnormal, it means that there is a foreign body defect in the linear motor, etc., which is convenient for maintenance personnel to deal with in time.

In an exemplary embodiment, as shown in FIG. 4 , the testing method in this embodiment includes:

S410 , based on the received operation instruction, send a frequency sweep signal to the linear motor.

In this step, the operation command is, for example, a test command triggered by a tester to start testing the linear motor. The processor of the electronic device receives the test instruction triggered by the tester, and generates a matching test signal based on the instruction. For example, the test signal is a frequency sweep signal. The processor of the electronic device drives the linear motor to move with a rated voltage value, and sends the frequency sweep signal to the driving chip of the linear motor to determine the actual operating parameters of the linear motor.

During the production of linear motors, there will be production errors between the design parameters and actual parameters of each linear motor. Here, the parameter is, for example, the resonance frequency. If the linear motor cannot run at the actual resonant frequency, the vibration effect of the linear motor cannot be maximized, which affects the accuracy of the test results. Therefore, before testing whether the linear motor is qualified, it is also necessary to determine the actual resonance frequency of the linear motor, and use the actual resonance frequency to drive the linear motor to vibrate to ensure the accuracy of the test results of the linear motor.

In this step, after the processor of the electronic device drives the motor to move with the rated voltage value, the processor of the electronic device sends a sweep frequency signal in a sweeping manner, for example, the sweep frequency signal is a frequency between 80Hz-200Hz. The frequency is continuously varied from low to high to determine the actual resonant frequency of the linear motor.

In one example, the processor of the electronic device sends swept frequency signals of different frequencies to the linear motor starting at 80 Hz. For example, the frequency sweep signal of different frequencies is increased by 1Hz on the basis of 80Hz every 200ms until it reaches 200Hz. In the process of sending the frequency sweep signal, the vibration of the linear motor at different frequencies is collected at the same time. Select the frequency point with the largest vibration amount as the actual resonant frequency F0 of the linear motor, and run at F0, so that the vibration effect of the linear motor can be brought into full play.

S420. Acquire vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of the linear motor in multiple directions perpendicular to each other.

S430. Perform signal analysis on the vibration information to determine a vibration waveform.

S440, according to the vibration waveform and the pre-stored vibration design parameters, determine that the linear motor is qualified.

The method in this embodiment determines the actual design parameters of the linear motor, and drives the linear motor based on the actual design parameters, so as to ensure the vibration effect of the linear motor when it is running, and improve the accuracy of the test results.

In an exemplary embodiment, as shown in FIG. 5 , the testing method in this embodiment includes:

S510. Based on the received operation command, send a sine wave signal to the linear motor.

In this step, the operation command is, for example, a test command triggered by a tester to start a test program for the linear motor. The processor of the electronic device receives the test instruction triggered by the tester, and generates a matching test signal based on the instruction. For example, the test signal is a sine wave signal. The processor of the electronic device drives the linear motor to run at a rated voltage value, and sends the sine wave signal to the chip of the linear motor to determine the vibration state of the linear motor.

Due to the characteristics of the linear motor itself, when the linear motor is produced, different linear motors have different parameters, such as the resonance frequency.

In this step, the processor of the electronic device drives the linear motor to vibrate at the actual resonant frequency, and assigns the value as the rated voltage of the linear motor, so that a more accurate test result can be obtained. Among them, the actual resonant frequency can be regarded as a sine wave signal. By sending a sine wave signal, the quality of the linear motor can be more accurately tested, and the defective linear motor can be prevented from being put into the market.

S520. Acquire vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of multiple mutually perpendicular directions of the linear motor.

S530. Perform signal analysis on the vibration information to determine a vibration waveform.

S540. According to the vibration waveform and the pre-stored vibration design parameters, determine that the linear motor is qualified.

The method in this embodiment uses the actual resonant frequency of the linear motor as a sine wave signal and sends it to the linear motor, so that the quality of the linear motor can be more accurately tested and the defective linear motor can be prevented from being put into the market.

In an exemplary embodiment, as shown in FIG. 6 , the testing method in this embodiment includes:

S610. Based on the received operation instruction, send a test signal corresponding to the operation instruction to the linear motor.

S620, acquiring vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information in multiple directions perpendicular to each other of the linear motor;

S630, adopting an empirical mode decomposition method to perform stabilization processing on the vibration information, and determine the vibration waveform.

In this step, the processor of the electronic device performs smoothing processing on the stored vibration information to determine the vibration waveform during the vibration of the linear motor.

In one example, the vibration sensor is correspondingly attached to the test surface of the linear motor, and the vibration information of the linear motor is collected, and the collected initial vibration information is regarded as the original signal of the linear motor. The upper and lower envelopes shown in Figure 10. The extreme point includes the maximum value and the minimum value of the vibration of the linear motor, the continuous curve between the maximum values is the upper envelope, and the continuous curve between the minimum values is the lower envelope.

Using empirical mode decomposition (EMD for short), the mean value of the upper envelope and the lower envelope is obtained, and the mean envelope shown in Figure 11 is drawn. Through the mean value of the original signal and the mean value envelope, the time domain diagram of the intermediate signal of the linear motor as shown in Figure 12 is obtained.

The vibration waveform collected by the vibration sensor is formed by the superposition of multiple modes. The collected original signal is decomposed into a finite number of Intrinsic Mode Functions (IMF) by EMD to obtain effective IMF components. , to improve the analysis effect of EMD.

Determine the intermediate signal: if the intermediate signal satisfies the IMF, the intermediate signal is a component of the IMF. If the IMF is not satisfied, the intermediate signal is used as the original signal, and the time domain diagram of the new original signal is shown in FIG. 13, and the decomposition is performed again until the effective IMF component is obtained.

When the first valid IMF component is obtained, IMF1 is subtracted from the original signal as a new original signal, and the analysis is continued to obtain IMF2, and so on. Several IMF diagrams obtained by EMD decomposition.

S640. According to the vibration waveform and the pre-stored vibration design parameters, determine that the linear motor is qualified.

In step S640, the electronic device compares each modal frequency of the vibration waveform with the pre-stored design frequency of the linear motor to determine whether the linear motor is qualified.

In one example, each modal frequency of the vibration waveform of the linear motor is less than four times the pre-stored design frequency of the linear motor, indicating that the overall performance of the linear motor is good.

If there is a difference between the frequency of the strongest vibration mode of the test surface in the second direction of the linear motor and the design frequency of the linear motor, it indicates that the linear motor is an unqualified product.

The strongest vibration mode frequency of the test surface in the first direction of the linear motor, and the difference between the strongest vibration mode frequency of the test surface in the third direction of the linear motor and twice the design frequency of the linear motor, it indicates that Linear motors are substandard products.

Here, it should be noted that the above comparison of the vibration waveform and the pre-stored vibration design parameters is only an exemplary illustration, which is used to explain the present embodiment and does not limit the present application.

The method in this embodiment uses empirical mode decomposition to complete the analysis of the vibration information of the linear motor, comprehensively evaluates the test results of the linear motor, and improves the accuracy of the overall test results of the linear motor.

In an exemplary embodiment, as shown in FIG. 7 , the testing device in this embodiment includes:

The sending module 110 , the obtaining module 120 , the first determining module 130 and the second determining module 140 . The device in this embodiment is used to implement the testing method of the linear motor as shown in FIG. 11 .

In this embodiment, the sending module 110 is configured to send a test signal corresponding to the operation instruction to the linear motor based on the received operation instruction. The acquiring module 120 is configured to acquire vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of the linear motor in multiple directions perpendicular to each other. The first determining module 130 is configured to perform signal analysis on the vibration information to determine the vibration waveform. The second determination module 140 is configured to determine that the linear motor is qualified according to the vibration waveform and the pre-stored vibration design parameters.

In an exemplary embodiment, as shown in FIG. 7 , the testing device in this embodiment includes:

The sending module 110 , the obtaining module 120 , the first determining module 130 and the second determining module 140 . The device in this embodiment is used to implement the testing method of the linear motor as shown in FIG. 11 .

In this embodiment, the acquisition module 120 is further configured to acquire audio information generated by the linear motor based on the test signal, where the audio information includes audio sub-information in multiple mutually perpendicular directions of the linear motor. The first determining module 130 is further configured to perform signal analysis on the audio information to determine the audio frequency spectrum. The second determining module 140 is further configured to, according to the audio frequency spectrum and the pre-stored audio design parameters, determine that the linear motor is qualified.

In an exemplary embodiment, as shown in FIG. 7 , the testing device in this embodiment includes:

The sending module 110 , the obtaining module 120 , the first determining module 130 and the second determining module 140 . The device in this embodiment is used to implement the testing method of the linear motor as shown in FIG. 11 .

In this embodiment, the first determining module 130 is further configured to expand the audio information in the range of 0 to 30 KHz to determine the audio frequency spectrum.

In an exemplary embodiment, as shown in FIG. 7 , the testing device in this embodiment includes:

The sending module 110 , the obtaining module 120 , the first determining module 130 and the second determining module 140 . The device in this embodiment is used to implement the testing method of the linear motor as shown in FIG. 11 .

In this embodiment, the sending module 110 is further configured to send a frequency sweep signal to the linear motor based on the received operation instruction.

In an exemplary embodiment, as shown in FIG. 7 , the testing device in this embodiment includes:

The sending module 110 , the obtaining module 120 , the first determining module 130 and the second determining module 140 . The device in this embodiment is used to implement the testing method of the linear motor as shown in FIG. 11 .

In this embodiment, the sending module 110 is further configured to send a sine wave signal to the linear motor based on the received operation instruction.

In an exemplary embodiment, as shown in FIG. 7 , the testing device in this embodiment includes:

The sending module 110 , the obtaining module 120 , the first determining module 130 and the second determining module 140 . The device in this embodiment is used to implement the testing method of the linear motor as shown in FIG. 11 .

In this embodiment, the first determination module 130 is further configured to perform a smoothing process on the vibration information by using an empirical mode decomposition method, and determine the vibration waveform.

Figure 15 is a block diagram of an electronic device. The present disclosure also provides an electronic device including a processor and a memory for storing executable instructions of the processor. Wherein, the processor is configured to execute the testing method of the linear motor as shown in FIGS. 1 to 6 .

The electronic device 300 may include one or more of the following components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input/output (I/O) interface 312, a sensor component 314, and a communication component 316.

The processing component 302 generally controls the overall operation of the electronic device 300, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 302 may include one or more processors 320 to execute instructions to perform all or part of the steps of the methods described above. Additionally, processing component 302 may include one or more modules that facilitate interaction between processing component 302 and other components. For example, processing component 302 may include a multimedia module to facilitate interaction between multimedia component 308 and processing component 302 .

Memory 304 is configured to store various types of data to support operation at electronic device 300 . Examples of such data include instructions for any application or method operating on electronic device 300, contact data, phonebook data, messages, pictures, videos, and the like. Memory 304 may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.

Power component 306 provides power to various components of electronic device 300 . Power components 306 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to device 300 .

The multimedia component 308 includes a screen that provides an output interface between the electronic device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. A touch sensor can sense not only the boundaries of a touch or swipe action, but also the duration and pressure associated with the touch or swipe action. In some embodiments, the multimedia component 308 includes a front-facing camera and/or a rear-facing camera. When the electronic device 300 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have focal length and optical zoom capability.

Audio component 310 is configured to output and/or input audio signals. For example, audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when electronic device 300 is in operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in memory 304 or transmitted via communication component 316 . In some embodiments, audio component 310 also includes a speaker for outputting audio signals.

The I/O interface 312 provides an interface between the processing component 302 and a peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.

Sensor assembly 314 includes one or more sensors for providing status assessment of various aspects of electronic device 300 . For example, the sensor assembly 314 can detect the open/closed state of the electronic device 300, the relative positioning of the components, such as the display and keypad of the electronic device 300, and the sensor assembly 314 can also detect the electronic device 300 or a component of the electronic device 300. Changes in position, presence or absence of user contact with the electronic device 300 , orientation or acceleration/deceleration of the electronic device 300 and temperature changes in the device 300 . Sensor assembly 314 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 314 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 316 is configured to facilitate wired or wireless communication between electronic device 300 and other devices. The electronic device 300 may access wireless networks based on communication standards, such as WiFi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 316 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 316 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, electronic device 300 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A programmed gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.

An exemplary embodiment of the present disclosure provides a non-transitory processor-readable storage medium, such as a memory 304 including instructions that can be executed by the processor 320 of the electronic device 300 to complete the above method. For example, the processor-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like. When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device is enabled to execute the methods shown in FIG. 1 to FIG. 6 .

Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or conventional techniques in the art not disclosed by this disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

It should be understood that the present invention is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims (16)

1. A method of testing a linear motor, the method comprising:

based on the received operation instruction, sending a test signal corresponding to the operation instruction to the linear motor;

acquiring vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of a plurality of directions of the linear motor perpendicular to each other;

performing signal analysis on the vibration information to determine a vibration waveform;

and determining that the linear motor is qualified according to the vibration waveform and prestored vibration design parameters.

2. The method of testing a linear motor according to claim 1, further comprising:

acquiring audio information generated by the linear motor based on the test signal, wherein the audio information comprises audio sub-information of a plurality of directions of the linear motor, which are perpendicular to each other.

Performing signal analysis on the audio information to determine an audio frequency spectrum;

and determining that the linear motor is qualified according to the audio frequency spectrum and pre-stored audio design parameters.

3. The method for testing a linear motor according to claim 2, wherein the performing signal analysis on the audio information to determine an audio frequency spectrum comprises:

and spreading the audio information at 0-30 KHz, and determining an audio frequency spectrum.

4. The method for testing a linear motor according to claim 1, wherein the sending a test signal corresponding to the operation command to the linear motor based on the received operation command comprises:

sending a frequency sweep signal to the linear motor based on the received operating command.

5. The method for testing a linear motor according to claim 1, wherein the sending a test signal corresponding to the operation command to the linear motor based on the received operation command comprises:

based on the received operation command, a sine wave signal is sent to the linear motor.

6. The method for testing a linear motor according to claim 1, wherein the performing signal analysis on the vibration information to determine a vibration waveform comprises:

and adopting an empirical mode decomposition method to carry out stabilization processing on the vibration information and determining the vibration waveform.

7. The method of testing a linear motor according to claim 1, wherein the vibration information includes long vibration information and/or short vibration information.

8. A testing device for a linear motor, the testing device comprising:

the transmission module is used for transmitting a test signal corresponding to the operation instruction to the linear motor based on the received operation instruction;

the acquisition module is used for acquiring vibration information generated by the linear motor based on the test signal; wherein the vibration information includes vibrator information of a plurality of directions of the linear motor perpendicular to each other;

the first determining module is used for carrying out signal analysis on the vibration information and determining a vibration waveform;

and the second determining module is used for determining that the linear motor is qualified according to the vibration waveform and prestored vibration design parameters.

9. The testing device of a linear motor according to claim 8, further comprising:

the obtaining module is further configured to obtain audio information generated by the linear motor based on the test signal, where the audio information includes audio sub-information of multiple directions of the linear motor that are perpendicular to each other.

The first determining module is further configured to perform signal analysis on the audio information to determine an audio frequency spectrum;

the second determining module is further configured to determine that the linear motor is qualified according to the audio frequency spectrum and a pre-stored audio design parameter.

10. The testing device of a linear motor according to claim 9, wherein the first determining module is specifically configured to:

and spreading the audio information at 0-30 KHz, and determining an audio frequency spectrum.

11. The testing device of a linear motor according to claim 8, wherein the sending module is specifically configured to:

sending a frequency sweep signal to the linear motor based on the received operating command.

12. The testing device of a linear motor according to claim 8, wherein the sending module is specifically configured to:

based on the received operation command, a sine wave signal is sent to the linear motor.

13. The testing device of a linear motor according to claim 8, wherein the first determining module is specifically configured to:

and adopting an empirical mode decomposition method to carry out stabilization processing on the vibration information and determining the vibration waveform.

14. The testing device of a linear motor according to claim 8, wherein the vibration information includes long vibration information and/or short vibration information.

15. An electronic device, comprising:

a processor, a memory for storing executable instructions for the processor;

wherein the processor is configured to perform a method of testing a linear motor according to any one of claims 1 to 7.

16. A non-transitory processor-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method of testing a linear motor of any of claims 1 to 7.

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