CN118100589A - Dual-frequency ultrasonic power supply and control method thereof - Google Patents
Dual-frequency ultrasonic power supply and control method thereof Download PDFInfo
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Abstract
The invention provides a double-frequency ultrasonic power supply and a control method thereof, wherein the power supply comprises: the driving circuit, the power supply controller and the feedback regulating circuit are connected with the power supply controller and the piezoelectric transducer; the feedback regulating circuit is used for collecting working signals of the piezoelectric transducer and outputting a frequency tracking signal for regulating the frequency and the step length of the signals to the power supply controller according to the amplitude information and the phase information of the working signals; the power supply controller is used for generating a frequency modulation control instruction according to the frequency tracking signal and sending the frequency modulation control instruction to the driving circuit; the driving circuit is used for outputting driving signals to the piezoelectric transducer according to the frequency modulation control instruction. According to the scheme provided by the invention, the rapid frequency tracking can be performed according to the amplitude information and the phase information of the working signal of the piezoelectric transducer, the signal frequency and the step length are regulated according to the frequency tracking signal, and finally the driving signal can drive the piezoelectric transducer to work on the resonance point, so that the driving stability and the driving safety are improved.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a double-frequency ultrasonic power supply and a control method thereof.
Background
With the development of ultrasonic power technology, single-frequency ultrasonic power supplies have not been able to meet the needs of the industrial field, and accordingly, dual-frequency ultrasonic power supplies, such as dual-frequency ultrasonic power supplies capable of driving piezoelectric transducers to work, have been developed.
In practical application, the piezoelectric transducer can change its own inherent resonant frequency due to the difference of surrounding environments, self-heating of the device, abrupt load change and other reasons, and the problem of resonant frequency drift occurs, so that the stable operation of the piezoelectric transducer is affected.
In the related art, the dual-frequency ultrasonic power supply only has a simple driving function, has a single function, cannot cope with the situation of resonance frequency drift of the piezoelectric transducer, and has the problem of low driving stability and safety of the piezoelectric transducer.
Disclosure of Invention
The invention provides a double-frequency ultrasonic power supply and a control method thereof, which are used for solving the defects of low driving stability and safety of the traditional double-frequency ultrasonic power supply.
In a first aspect, the present invention provides a dual frequency ultrasonic power supply comprising: the driving circuit and the feedback regulating circuit are connected with the power supply controller and the piezoelectric transducer;
The feedback regulating circuit is used for collecting working signals of the piezoelectric transducer and outputting a frequency tracking signal for regulating signal frequency and step length to the power supply controller according to amplitude information and phase information of the working signals;
the power supply controller is used for generating a frequency modulation control instruction according to the frequency tracking signal and sending the frequency modulation control instruction to the driving circuit;
The driving circuit is used for outputting a driving signal to the piezoelectric transducer according to the frequency modulation control instruction.
According to the dual-frequency ultrasonic power supply provided by the invention, the driving circuit comprises: the device comprises a driving power supply, a signal generator, a phase-shifting full-bridge driving sub-circuit, a full-bridge inverter and a matching sub-circuit;
The signal generator is respectively connected with the power supply controller and the phase-shifting full-bridge driving sub-circuit, the phase-shifting full-bridge driving sub-circuit is connected with the full-bridge inverter, the full-bridge inverter is respectively connected with the driving power supply and the matching sub-circuit, and the matching sub-circuit is connected with the piezoelectric transducer;
The signal generator is used for sending a synchronous clock signal to the phase-shifting full-bridge driving sub-circuit according to the frequency modulation control instruction; the phase-shifting full-bridge driving sub-circuit is used for sending a multi-channel pulse width modulation signal to the full-bridge inverter according to the synchronous clock signal; the full-bridge inverter is used for integrating the multi-path pulse width modulation signals into alternating driving signals and sending the alternating driving signals to the matching sub-circuit; the matching sub-circuit is used for converting the alternating driving signal into a sinusoidal alternating signal and driving the piezoelectric transducer to operate through the sinusoidal alternating signal.
According to the dual-frequency ultrasonic power supply provided by the invention, the phase-shifting full-bridge driving sub-circuit comprises: the phase-shifting resonance full-bridge controller is respectively connected with the power supply controller and the waveform generator;
The phase-shifting resonance full-bridge controller is used for sending a signal generating instruction to the waveform generator according to the synchronous clock signal; the waveform generator is used for generating an instruction according to the signal and sending a multi-path pulse width modulation signal to the full-bridge inverter.
According to the dual-frequency ultrasonic power supply provided by the invention, the matching sub-circuit comprises: the piezoelectric transducer comprises a full-bridge inverter, a piezoelectric transducer, a first matching module, a second matching module and a matching branch circuit.
According to the dual-frequency ultrasonic power supply provided by the invention, the first matching module and/or the second matching module are built based on the LC matching network.
According to the dual-frequency ultrasonic power supply provided by the invention, the feedback regulating circuit comprises: the signal collector is respectively connected with the piezoelectric transducer and the frequency tracker, and the frequency tracker is connected with the power supply controller;
the signal collector is used for collecting working signals of the piezoelectric transducer and sending the working signals to the frequency tracker;
The frequency tracking device is used for extracting amplitude information and phase information of the working signals and outputting frequency tracking signals for adjusting signal frequency and step length to the power supply controller according to the amplitude information and the phase information.
According to the double-frequency ultrasonic power supply provided by the invention, the signal collector comprises a voltage collector and a current collector, and the voltage collector and the current collector are respectively connected with the piezoelectric transducer and the frequency tracking device;
The voltage collector is used for collecting voltage signals of the piezoelectric transducer, and the current collector is used for collecting current signals of the piezoelectric transducer.
According to the dual-frequency ultrasonic power supply provided by the invention, the feedback regulating circuit further comprises a temperature detection sub-circuit, wherein the temperature detection sub-circuit is respectively connected with the piezoelectric converter and the power supply controller;
The temperature detection sub-circuit is used for collecting temperature data of the piezoelectric transducer and sending the temperature data to the power supply controller;
The power supply controller is used for determining a voltage regulation section corresponding to the current control period according to the temperature data and outputting a segmentation control instruction to the driving circuit according to the voltage regulation section.
According to the dual-frequency ultrasonic power supply provided by the invention, the power supply controller comprises a PI control module;
The PI control module is used for receiving the working signal of the piezoelectric transducer, calculating the actual measurement power of the piezoelectric transducer according to the working signal, determining a power deviation value between the actual measurement power and preset standard power, and outputting a constant power control instruction to the driving circuit according to the power deviation value.
In a second aspect, the present invention also provides a control method of a dual-frequency ultrasonic power supply, the method being based on the dual-frequency ultrasonic power supply as described in any one of the above, the method comprising:
the feedback regulation circuit is controlled to collect working signals of the piezoelectric transducer, and a frequency tracking signal for regulating the frequency and the step length of the signals is generated according to the amplitude information and the phase information of the working signals;
and generating a frequency modulation control instruction according to the frequency tracking signal so as to control a driving circuit to output a driving signal to the piezoelectric transducer according to the frequency modulation control instruction.
According to the double-frequency ultrasonic power supply and the control method thereof, the feedback regulating circuit, the driving circuit and the power supply controller are matched, the working signal of the piezoelectric transducer can be collected through the feedback regulating circuit, the frequency tracking signal for regulating the frequency and the step length of the signal is output according to the amplitude information and the phase information of the working signal, the power supply controller generates a frequency modulation control instruction according to the frequency tracking signal, and the driving circuit outputs the driving signal to the piezoelectric transducer according to the frequency modulation control instruction. The frequency tracking can be performed rapidly according to the amplitude information and the phase information of the working signal of the piezoelectric transducer, the signal frequency and the step length are regulated according to the frequency tracking signal, and finally the driving signal can drive the piezoelectric transducer to work on the resonance point all the time, so that the driving stability and the driving safety are improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual-frequency ultrasonic power supply according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of a dual-frequency ultrasonic power supply according to an embodiment of the present invention;
FIG. 3 is a flow chart of a control method of a dual-frequency ultrasonic power supply according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the invention. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiment relates to the field of power supplies, and particularly can be applied to a scene of performing double-frequency driving on a piezoelectric transducer. For example, the piezoelectric transducer can be used for a dual-frequency ultrasonic cleaning machine, the dual-frequency ultrasonic cleaning technology can effectively eliminate cleaning blind areas, improve cleaning efficiency and reduce damage to objects, the dual-frequency ultrasonic power supply cleaning array can save space, the application cost is relatively low, the working mode of dual-frequency switching can effectively eliminate the influence of standing waves, high-frequency ultrasonic waves can deeply clean pollutants in gaps of objects, low-frequency ultrasonic waves can clean pollutants on surfaces of the objects, and the dual-frequency cleaning mode is higher in efficiency and lower in cost.
In an actual application scene, the inherent resonant frequency of the piezoelectric transducer can be changed due to the reasons of surrounding environment difference, self-heating of the device, abrupt load change and the like, and the frequency and the amplitude of the piezoelectric transducer show a certain relationship under different load conditions. When the resonant frequency of the transducer drifts, if the driving power supply cannot track the resonant frequency of the transducer, the whole ultrasonic power supply system is detuned, so that loss is increased, and even the ultrasonic power supply is damaged.
Therefore, a dual-frequency ultrasonic power supply capable of efficiently and accurately realizing frequency tracking, higher driving stability and reliability and more perfect functions is needed.
The following describes a dual-frequency ultrasonic power supply and a control method thereof according to an embodiment of the present invention with reference to fig. 1 to 4.
Referring to fig. 1, the dual-frequency ultrasonic power supply provided by the embodiment of the present invention may be used to drive a piezoelectric transducer to operate, and specifically includes: the driving circuit 110, the power supply controller 120 and the feedback regulating circuit 130, wherein the driving circuit 110 and the feedback regulating circuit 130 are connected with the power supply controller 120 and the piezoelectric transducer 140.
The feedback adjusting circuit 130 is configured to collect an operating signal of the piezoelectric transducer 140, and output a frequency tracking signal for adjusting a frequency and a step size of the signal to the power controller 120 according to amplitude information and phase information of the operating signal.
The power controller 120 is configured to generate a frequency modulation control command according to the frequency tracking signal, and send the frequency modulation control command to the driving circuit 110.
The driving circuit 110 is configured to output a driving signal to the piezoelectric transducer 140 according to the frequency modulation control command.
It can be understood that, in this embodiment, the driving circuit 110, the power controller 120 and the feedback adjusting circuit 130 can output the frequency tracking signal according to the amplitude information and the phase information of the working signal of the piezoelectric transducer 140, so that the power controller 120 sends the frequency modulation control command to the driving circuit according to the frequency tracking signal, and the piezoelectric transducer can be driven to always work on the resonance point by adjusting the frequency and the step size of the signal, thereby improving the driving stability and the safety of the piezoelectric transducer.
In one embodiment, referring to fig. 2, the driving circuit 110 includes: a drive power supply 210, a signal generator 220, a phase-shifted full-bridge drive sub-circuit 230, a full-bridge inverter 240, and a matching sub-circuit 250.
The signal generator 220 is respectively connected with the power supply controller 120 and the phase-shifting full-bridge driving sub-circuit 230, the phase-shifting full-bridge driving sub-circuit 230 is connected with the full-bridge inverter 240, the full-bridge inverter 240 is respectively connected with the driving power supply 210 and the matching sub-circuit 250, and the matching sub-circuit 250 is connected with the piezoelectric transducer 140.
The signal generator 220 is configured to send a synchronous clock signal to the phase-shifting full-bridge driving sub-circuit 230 according to the frequency modulation control command; the phase-shifting full-bridge driving sub-circuit 230 is configured to send a multi-pulse-width modulation signal to the full-bridge inverter 240 according to the synchronous clock signal; the full-bridge inverter 240 is configured to integrate the multiple pulse width modulated signals into an alternating driving signal and send the alternating driving signal to the matching sub-circuit 250; the matching sub-circuit 250 is used to convert the alternating drive signal into a sinusoidal alternating signal and drive the piezoelectric transducer 140 to operate via the sinusoidal alternating signal.
In this embodiment, the driving power source 210 may supply power to the full-bridge inverter 240, and in some embodiments, the driving power source 210 may specifically include an ac power source and a rectifying filter, where the ac power source may provide 220V ac mains supply, and after rectifying and filtering by the rectifying filter, the ac power source may be converted into 310V dc.
The signal generator 220 may be a DDS signal generator, and the signal generator 220 may provide a synchronous clock signal for the phase-shifted full-bridge driving sub-circuit 230, with an accuracy of 0.1Hz.
The full-bridge inverter 240 may adopt an IGBT full-bridge circuit, and the full-bridge inverter 240 may integrate multiple (four in this embodiment) pulse width modulation signals from the phase-shift full-bridge driving sub-circuit into an alternating driving signal with an adjustable duty ratio via the IGBT full-bridge.
In one embodiment, the phase-shifting full-bridge driver sub-circuit includes: the phase-shifting resonance full-bridge controller is respectively connected with the power supply controller and the waveform generator;
The phase-shifting resonance full-bridge controller is used for sending a signal generating instruction to the waveform generator according to the synchronous clock signal; the waveform generator is used for generating an instruction according to the signal and sending a multi-channel pulse width modulation signal to the full-bridge inverter.
In this embodiment, the waveform generator may use an AD9833 chip, the phase-shifting resonance full-bridge controller may use a UCC3895 chip, and the two may cooperate to implement PWM (pulse width modulation) signals with output accuracy up to 0.1Hz, thereby improving the control accuracy of the dual-frequency ultrasonic power supply, and implementing fast frequency tracking in combination with the frequency tracker.
In one embodiment, referring to fig. 2, the matching sub-circuit 250 includes: the first matching module 2501 and the second matching module 2502, the first matching module 2501 and the second matching module 2502 are connected in parallel to form a matching branch, and the matching branch is connected with the full-bridge inverter 240 and the piezoelectric transducer 140 respectively.
In this embodiment, according to two adjustable working frequencies of the piezoelectric transducer, a first matching module 2501 and a second matching module 2502 are set, in practical application, referring to fig. 2, the first matching module 2501 is further connected in series with a first relay K1, the second matching module 2502 is further connected in series with a second relay K2, and the first matching module 2501 and the second matching module 2502 are automatically switched by two electromagnetic relays, so as to form a dynamic matching effect.
In some embodiments, the first matching module 2501 and/or the second matching module 2502 are built based on LC matching networks.
In this embodiment, the first matching module 2501 and the second matching module 2502 may both use LC matching networks, and may correspondingly match different working frequencies of the piezoelectric transducer by adjusting parameters of inductance and capacitance in the LC matching networks.
In one embodiment, referring to fig. 2, the feedback adjustment circuit includes: signal collector 260 and frequency tracker 270. Signal collector 260 is connected to piezoelectric transducer 140 and frequency tracker 270, respectively, and frequency tracker 270 is connected to power controller 120.
The signal collector 260 is used for collecting the working signal of the piezoelectric transducer and sending the working signal to the frequency tracker 270.
The frequency tracker 270 is used for extracting amplitude information and phase information of the working signal, and outputting a frequency tracking signal for adjusting the frequency and step size of the signal to the power controller 120 according to the amplitude information and the phase information.
In this embodiment, the signal collector 260 may collect the working signal of the piezoelectric transducer in real time, where the working signal may specifically include a current signal and a voltage signal.
In some embodiments, the frequency tracker 270 may use an HZ6686 frequency tracking chip, and according to the phase information and the amplitude information of the collected current signal and the collected voltage signal, the adjustment amounts of the signal frequency and the step length may be determined, so that the frequency tracking signal with frequency addition and subtraction and step length adjustment of the power supply controller 120 may be provided.
In one embodiment, the signal collector specifically comprises a voltage collector and a current collector, and the voltage collector and the current collector are respectively connected with the piezoelectric transducer and the frequency tracking device;
the voltage collector is used for collecting voltage signals of the piezoelectric transducer, and the current collector is used for collecting current signals of the piezoelectric transducer.
In this embodiment, the voltage collector and the current collector can synchronously collect the voltage signal and the current signal of the piezoelectric transducer, and can provide an effective data basis for the frequency tracker to realize frequency tracking.
In one embodiment, referring to fig. 1 and 2, the feedback conditioning circuit further includes a temperature detection sub-circuit 280, the temperature detection sub-circuit 280 being coupled to the piezoelectric transducer 140 and the power controller 120, respectively.
The temperature detection sub-circuit 280 is used to collect temperature data of the piezoelectric transducer 140 and send the temperature data to the power controller 120.
The power controller 120 is configured to determine a voltage adjustment section corresponding to the current control period according to the temperature data, and output a segment control instruction to the driving circuit 110 according to the voltage adjustment section.
In practical application, a piezoelectric transducer for an ultrasonic cleaner needs to be frequently started and stopped, and the piezoelectric transducer can generate heat when working for a long time due to existence of mechanical loss and dielectric loss. With the increase of working time, if corresponding treatment is not performed, the temperature of the piezoelectric sheet of the piezoelectric transducer can continuously rise, and if a certain temperature threshold value is exceeded, the piezoelectric transducer is inevitably damaged.
Aiming at the problems, the embodiment is provided with a sectional type power soft start function, so that the temperature rise of the piezoelectric sheet of the piezoelectric transducer can be effectively restrained, the power soft start of the ultrasonic power supply is realized in a mode of regulating the power in a sectional mode, and the temperature rise of the piezoelectric sheet of the transducer can be effectively restrained.
In some embodiments, the corresponding voltage adjustment sections may be set according to different temperatures of the piezoelectric transducer, for example, when the temperature of the piezoelectric transducer is in a first temperature section, the corresponding first voltage adjustment section, when the temperature of the piezoelectric transducer is in a second temperature section, the corresponding second voltage adjustment section, and so on, a plurality of voltage adjustment sections may be set.
In practical application, a plurality of temperature thresholds may be set, where the temperature thresholds may take a preset section start value or a preset section end value of the temperature section, for example, a first temperature threshold is set as a section start value of the first temperature section, and when it is detected that the measured temperature of the piezoelectric transducer reaches the first temperature threshold, it is indicated that the measured temperature is in the first temperature section, and at this time, a segment control instruction may be output according to the first voltage adjustment section.
It is understood that the voltage regulation section may characterize an increasing or decreasing voltage quantity, i.e. a voltage regulation quantity, on the basis of the operating voltage corresponding to the current voltage signal. When the measured temperature of the piezoelectric transducer is detected to be higher, the working voltage needs to be reduced according to the voltage regulation section, so that the running power of the piezoelectric transducer can be reduced, the power soft start of the double-frequency ultrasonic power supply can be realized in a sectional power regulation mode, and the potential safety hazard caused by continuous temperature rise can be restrained.
In some embodiments, the temperature detection subcircuit 280 may include at least one temperature sensor, through which the measured temperature of the piezoelectric transducer is acquired. In practical application, the temperature sensor can be arranged near the piezoelectric sheet of the piezoelectric transducer, and can collect the measured temperature of the piezoelectric sheet.
In a specific implementation, the temperature detection sub-circuit 280 may include a plurality of temperature sensors, where the plurality of temperature sensors are respectively disposed around the piezoelectric sheet of the piezoelectric transducer, and the plurality of temperature sensors may collect sampling temperatures around the piezoelectric sheet, average the sampling temperatures collected by the plurality of temperature sensors, and use the obtained average temperature value as the measured temperature, so that the temperature detection process of the piezoelectric transducer may be more accurate and reliable.
In one embodiment, the power supply controller includes a PI control module;
the PI control module is used for receiving the working signal of the piezoelectric transducer, calculating the actual measurement power of the piezoelectric transducer according to the working signal, determining the power deviation value between the actual measurement power and the preset standard power, and outputting a constant power control instruction to the driving circuit according to the power deviation value.
In this embodiment, the measured power is differentiated from the preset standard power to obtain a power deviation value, which can be understood to represent the situation that the measured power deviates from the standard value, and the larger the power deviation value is, the farther the measured power value deviates from the standard value is. The control quantity for power regulation can be determined according to the power deviation value, and a constant power control instruction can be output to the driving circuit according to the control quantity, so that the piezoelectric transducer is driven to adjust the running power to be close to the preset standard power, and the constant power control function is realized.
In this embodiment, the PI (Proportional Integral ) control module may implement a constant power control function for the piezoelectric transducer, so as to further improve the driving stability of the piezoelectric transducer.
In this embodiment, the power supply controller may adopt a microcontroller with a model number of STM32F103RCT6, and may implement precise control over the frequency tracking process, power regulation and temperature regulation.
In some embodiments, referring to fig. 2, the dual-frequency ultrasonic power supply further includes a display screen 290, where the display screen 290 is connected to the power controller 120, and the display screen 290 can display relevant information such as an operating voltage, an operating current, an operating frequency, an operating power, and an actually measured temperature of the piezoelectric transducer, so that a worker can know the operating state of the piezoelectric transducer conveniently.
In some embodiments, the power controller 120 may also compare the measured temperature reported by the temperature detection sub-circuit 280 with the upper temperature limit value, and generate and send a temperature anomaly signal to the display screen 290 when the measured temperature is higher than the upper temperature limit value, so as to perform a temperature anomaly prompt through the display screen 290. For example, the display screen 290 may perform temperature anomaly early warning by means of text prompt, graphic prompt, etc.
In practical application, referring to fig. 2, the dual-frequency ultrasonic power supply further includes a function key 2100, where the function key 2100 is connected to the power supply controller 120, and the function key 2100 specifically may include an on-off control key, a function selection key, a reset key, and the like, and the function key 2100 may be disposed on an operation panel, may be a virtual key, or may be a physical key.
In practical applications, the user may send a control instruction to the power controller 120 through the function key 2100, for example, the control instruction may be at least one of an on instruction, an off instruction, a data viewing instruction, and a preset reset instruction, so as to implement the control functions of on/off, data viewing, early warning and resetting of the dual-frequency ultrasonic power supply.
In some embodiments, the frequency ultrasonic power supply further includes a communication interface 2110, where the communication interface 2110 is connected to the power controller 120, and the communication interface 2110 may connect the power controller 120 to an external device, such as an external data processing device, a control device, a data acquisition device, etc.
Based on the same general inventive concept, the present invention also protects a control method of a dual-frequency ultrasonic power supply, and the control method of the dual-frequency ultrasonic power supply provided by the present invention is described below, and the control method of the dual-frequency ultrasonic power supply described below and the dual-frequency ultrasonic power supply described above can be referred to correspondingly.
Referring to fig. 3, an embodiment of the present invention provides a method for controlling a dual-frequency ultrasonic power supply, where the method is implemented based on the dual-frequency ultrasonic power supply provided in the foregoing embodiments, and the method specifically includes:
step 310: and controlling a feedback regulating circuit to collect working signals of the piezoelectric transducer, and generating a frequency tracking signal for regulating the frequency and the step length of the signals according to the amplitude information and the phase information of the working signals.
Step 320: and generating a frequency modulation control command according to the frequency tracking signal so as to control the driving circuit to output a driving signal to the piezoelectric transducer according to the frequency modulation control command.
It can be understood that the execution body of the control method provided in this embodiment may be a power supply controller of a dual-frequency ultrasonic power supply, or may be a data processing device disposed outside the dual-frequency ultrasonic power supply.
In an embodiment, the control method further includes:
Acquiring temperature data of the piezoelectric transducer acquired by the temperature detection sub-circuit;
and determining a voltage regulation section corresponding to the current control period according to the temperature data, and outputting a segmentation control instruction to the driving circuit according to the voltage regulation section.
In an embodiment, the control method further includes:
Receiving a working signal of a piezoelectric transducer through a PI control module;
calculating the actual measurement power of the piezoelectric transducer according to the working signal, and determining a power deviation value between the actual measurement power and preset standard power;
And outputting a constant power control command to the driving circuit according to the power deviation value.
The specific manner in which the respective hardware performs the operations in the above embodiments has been described in detail in the embodiments related to the dual-frequency ultrasonic power supply, and will not be described in detail herein.
In summary, according to the control method of the dual-frequency ultrasonic power supply provided by the embodiment of the invention, the stable and safe driving of the piezoelectric transducer can be realized by the structural improvement of the dual-frequency ultrasonic power supply and the accurate control of the dual-frequency ultrasonic power supply.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
As shown in fig. 4, the electronic device may include: processor 410, communication interface (Communications Interface) 420, memory 430, and communication bus 440, wherein processor 410, communication interface 420, and memory 430 communicate with each other via communication bus 440. The processor 410 may invoke logic instructions in the memory 430 to perform the control method of the dual frequency ultrasonic power supply provided by the above embodiments.
Further, the logic instructions in the memory 430 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on such an understanding, the technical solution of the invention, in essence, or the part contributing to the prior art or the part of the technical solution, can be embodied in the form of a software product.
The computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer can execute the control method of the dual-frequency ultrasonic power supply provided in the foregoing embodiments.
In yet another aspect, the present invention further provides a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor is implemented to perform the control method of the dual-frequency ultrasonic power supply provided in the above embodiments.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A dual-frequency ultrasonic power supply, comprising: the driving circuit and the feedback regulating circuit are connected with the power supply controller and the piezoelectric transducer;
The feedback regulating circuit is used for collecting working signals of the piezoelectric transducer and outputting a frequency tracking signal for regulating signal frequency and step length to the power supply controller according to amplitude information and phase information of the working signals;
the power supply controller is used for generating a frequency modulation control instruction according to the frequency tracking signal and sending the frequency modulation control instruction to the driving circuit;
The driving circuit is used for outputting a driving signal to the piezoelectric transducer according to the frequency modulation control instruction.
2. The dual frequency ultrasonic power supply of claim 1, wherein the drive circuit comprises: the device comprises a driving power supply, a signal generator, a phase-shifting full-bridge driving sub-circuit, a full-bridge inverter and a matching sub-circuit;
The signal generator is respectively connected with the power supply controller and the phase-shifting full-bridge driving sub-circuit, the phase-shifting full-bridge driving sub-circuit is connected with the full-bridge inverter, the full-bridge inverter is respectively connected with the driving power supply and the matching sub-circuit, and the matching sub-circuit is connected with the piezoelectric transducer;
The signal generator is used for sending a synchronous clock signal to the phase-shifting full-bridge driving sub-circuit according to the frequency modulation control instruction; the phase-shifting full-bridge driving sub-circuit is used for sending a multi-channel pulse width modulation signal to the full-bridge inverter according to the synchronous clock signal; the full-bridge inverter is used for integrating the multi-path pulse width modulation signals into alternating driving signals and sending the alternating driving signals to the matching sub-circuit; the matching sub-circuit is used for converting the alternating driving signal into a sinusoidal alternating signal and driving the piezoelectric transducer to operate through the sinusoidal alternating signal.
3. The dual frequency ultrasonic power supply of claim 2, wherein the phase-shifted full-bridge driver sub-circuit comprises: the phase-shifting resonance full-bridge controller is respectively connected with the power supply controller and the waveform generator;
The phase-shifting resonance full-bridge controller is used for sending a signal generating instruction to the waveform generator according to the synchronous clock signal; the waveform generator is used for generating an instruction according to the signal and sending a multi-path pulse width modulation signal to the full-bridge inverter.
4. The dual frequency ultrasonic power supply of claim 2, wherein the matching sub-circuit comprises: the piezoelectric transducer comprises a full-bridge inverter, a piezoelectric transducer, a first matching module, a second matching module and a matching branch circuit.
5. The dual-frequency ultrasonic power supply according to claim 4, wherein the first matching module and/or the second matching module is built based on an LC matching network.
6. The dual frequency ultrasonic power supply of claim 1, wherein the feedback conditioning circuit comprises: the signal collector is respectively connected with the piezoelectric transducer and the frequency tracker, and the frequency tracker is connected with the power supply controller;
the signal collector is used for collecting working signals of the piezoelectric transducer and sending the working signals to the frequency tracker;
The frequency tracking device is used for extracting amplitude information and phase information of the working signals and outputting frequency tracking signals for adjusting signal frequency and step length to the power supply controller according to the amplitude information and the phase information.
7. The dual-frequency ultrasonic power supply of claim 6, wherein the signal collector comprises a voltage collector and a current collector, both of which are respectively connected with the piezoelectric transducer and the frequency tracker;
The voltage collector is used for collecting voltage signals of the piezoelectric transducer, and the current collector is used for collecting current signals of the piezoelectric transducer.
8. The dual-frequency ultrasonic power supply of claim 6, wherein the feedback conditioning circuit further comprises a temperature detection sub-circuit, the temperature detection sub-circuit being respectively connected to the piezoelectric transducer and the power supply controller;
The temperature detection sub-circuit is used for collecting temperature data of the piezoelectric transducer and sending the temperature data to the power supply controller;
The power supply controller is used for determining a voltage regulation section corresponding to the current control period according to the temperature data and outputting a segmentation control instruction to the driving circuit according to the voltage regulation section.
9. The dual frequency ultrasonic power supply of claim 1, wherein the power supply controller comprises a PI control module;
The PI control module is used for receiving the working signal of the piezoelectric transducer, calculating the actual measurement power of the piezoelectric transducer according to the working signal, determining a power deviation value between the actual measurement power and preset standard power, and outputting a constant power control instruction to the driving circuit according to the power deviation value.
10. A control method of a dual-frequency ultrasonic power supply, characterized in that the method comprises, based on the dual-frequency ultrasonic power supply according to any one of claims 1 to 9:
the feedback regulation circuit is controlled to collect working signals of the piezoelectric transducer, and a frequency tracking signal for regulating the frequency and the step length of the signals is generated according to the amplitude information and the phase information of the working signals;
and generating a frequency modulation control instruction according to the frequency tracking signal so as to control a driving circuit to output a driving signal to the piezoelectric transducer according to the frequency modulation control instruction.
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| CN202410083744.8A CN118100589A (en) | 2024-01-19 | 2024-01-19 | Dual-frequency ultrasonic power supply and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410083744.8A CN118100589A (en) | 2024-01-19 | 2024-01-19 | Dual-frequency ultrasonic power supply and control method thereof |
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| CN202410083744.8A Pending CN118100589A (en) | 2024-01-19 | 2024-01-19 | Dual-frequency ultrasonic power supply and control method thereof |
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