An ultrasonic wave generating device and method

Abstract

The application discloses an ultrasonic wave generating device, which comprises a control module, a voltage conversion module, a signal generating module, a power switch module and an ultrasonic transducing module. The control module is used to generate an analog voltage and a control signal. The voltage conversion module is used to receive the analog voltage and output a direct current voltage based on the control of the analog voltage. The signal generating module is used to receive the control signal and generate an adjustable square wave signal based on the control signal. The power switch module is used to receive the adjustable square wave signal, change the switch state according to the adjustable square wave signal, and output a sine alternating voltage based on the change of the switch state and the direct current voltage. The ultrasonic transducing module is used to excite an ultrasonic wave signal according to the sine alternating voltage. The application directly adjusts the analog voltage through the control module, and the scheme is more mature and the cost is lower compared with the prior art.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic technology, specifically relating to an ultrasonic wave generating device and method. Background Technology

[0002] The principle behind ultrasonic transducers outputting ultrasonic waves is primarily through the application of a sinusoidal alternating voltage to the transducer, causing it to vibrate and emit ultrasonic waves, thus converting high-frequency electrical energy into mechanical energy. The output acoustic power of the transducer can be adjusted by regulating the power of the sinusoidal alternating voltage applied to it. Methods for adjusting the power of the sinusoidal alternating voltage include:

[0003] (1) Adjust the pulse width (PWM) of the sinusoidal alternating voltage, (2) adjust the frequency (PFM) of the sinusoidal alternating voltage, and (3) adjust the pulse width and frequency of the sinusoidal alternating voltage. The above methods are not applicable to traditional ultrasonic power control, and the control function is relatively complex. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the present invention provides an ultrasonic generating device and method to solve at least one of the defects in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides an ultrasonic wave generating device, the device comprising:

[0006] The control module is used to generate an analog voltage and a control signal;

[0007] A voltage conversion module is used to receive the analog voltage and output a DC voltage based on the control of the analog voltage;

[0008] A signal generation module is used to receive the control signal and generate an adjustable square wave signal based on the control signal;

[0009] A power switch module is used to receive the adjustable square wave signal, change the switch state according to the adjustable square wave signal, and output a sinusoidal alternating voltage based on the change of the switch state and the DC voltage.

[0010] An ultrasonic transducer module is used to excite ultrasonic signals according to the sinusoidal alternating voltage.

[0011] In one embodiment of the present invention, the control module is further configured to acquire the output parameters of the ultrasonic signal, and generate the analog voltage and the control signal according to the output parameters.

[0012] In one embodiment of the present invention, the output parameters include output acoustic power, modulation frequency, duty cycle, output time, and output ultrasonic frequency.

[0013] In one embodiment of the present invention, the control module is a microcontroller.

[0014] In one embodiment of the present invention, the power switch module is a half-bridge power switch.

[0015] In one embodiment of the present invention, the device further includes:

[0016] The matching module provides a sinusoidal alternating voltage to the ultrasonic transducer module through the power switch module.

[0017] To achieve the above and other related objectives, the present invention provides a method for generating ultrasonic waves, comprising: generating ultrasonic waves using the aforementioned ultrasonic wave generating device; the method comprising:

[0018] To acquire the target electrical or acoustic power of the ultrasonic signal;

[0019] Based on the power curve, the target analog voltage is obtained, wherein the power curve is pre-calibrated and represents the relationship between the electrical power or acoustic power of the ultrasonic signal and the analog voltage.

[0020] The DC voltage output by the voltage conversion module is adjusted based on the target analog voltage, and the power switch module is controlled in combination with the DC voltage and the control signal to output a sinusoidal alternating voltage. The sinusoidal alternating voltage is applied to the ultrasonic transducer module to excite an ultrasonic signal with the target acoustic power.

[0021] In one embodiment of the present invention, the method for obtaining the power curve is as follows:

[0022] The electrical power of the ultrasonic signal under different analog voltages was obtained and the acoustic-to-electric conversion efficiency of the ultrasonic transducer was tested.

[0023] The power curves are obtained by fitting the different analog voltages and the corresponding electric power of the ultrasonic signals under the different analog voltages.

[0024] The power curve is represented as follows:

[0025] Y = a*(x / d) b +c;

[0026] Y represents the magnitude of the analog voltage, a, b, and c are the calibrated parameters, X represents the magnitude of the acoustic power output by the ultrasonic transducer, and d represents the acoustic-to-electrical conversion efficiency of the ultrasonic transducer.

[0027] In one embodiment of the present invention, the method for obtaining the power curve is as follows:

[0028] Obtain the acoustic power of the ultrasonic signal corresponding to different analog voltages;

[0029] The power curves are obtained by fitting the acoustic power of the ultrasonic signals under different analog voltages and the corresponding analog voltages.

[0030] The power curve is represented as follows:

[0031] Y = a * x b +c

[0032] Y represents the magnitude of the analog voltage, a, b, and c are the calibrated parameters, and X represents the magnitude of the acoustic power output by the ultrasonic transducer.

[0033] In one embodiment of the present invention, a matrix laboratory is used to fit the electrical or acoustic power of the ultrasonic signals corresponding to the different analog voltages.

[0034] As described above, the ultrasonic wave generating device and method of the present invention have the following beneficial effects:

[0035] An ultrasonic generator according to the present invention includes: a control module for generating an analog voltage and a control signal; a voltage conversion module for receiving the analog voltage and outputting a DC voltage based on the control of the analog voltage; a signal generation module for receiving the control signal and generating an adjustable square wave signal based on the control signal; a power switch module for receiving the adjustable square wave signal, changing the switch state according to the adjustable square wave signal, and outputting a sinusoidal alternating voltage based on the change of the switch state and the DC voltage; and an ultrasonic transducer module for exciting an ultrasonic signal according to the sinusoidal alternating voltage. The present invention directly adjusts the analog voltage through the control module, which is a more mature and lower-cost solution compared to existing technologies.

[0036] Moreover, the present invention controls the output sound power by calibrating and fitting the power curve, which has high control accuracy and stable output sound power. Attached Figure Description

[0037] Figure 1 This is a schematic diagram illustrating the application environment of the ultrasonic wave generation method in an exemplary embodiment of the present invention;

[0038] Figure 2 This is a schematic block diagram of an ultrasonic generator in an exemplary embodiment of the present invention;

[0039] Figure 3 This is a circuit diagram of a half-bridge circuit in an exemplary embodiment of the present invention;

[0040] Figure 4 This is a flowchart of an exemplary embodiment of the present invention for generating ultrasonic waves.

[0041] exist Figure 1 In the diagram, 1 represents an electronic device, 11 represents a memory, 12 represents a processor, 13 represents a camera device, 14 represents a network interface, and 15 represents a communication bus. Detailed Implementation

[0042] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0043] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0045] This invention provides a method for generating ultrasonic waves, applied to an electronic device 1. (Refer to...) Figure 1 The diagram shown is a schematic representation of the application environment of the energy management method in one embodiment of the present invention.

[0046] In this embodiment, the electronic device 1 can be a terminal device with computing capabilities, such as a server, smartphone, tablet computer, portable computer, or desktop computer.

[0047] The electronic device 1 includes: a processor 12, a memory 11, a camera device 13, a network interface 14, and a communication bus 15.

[0048] The memory 11 includes at least one type of readable storage medium. The at least one type of readable storage medium may be a non-volatile storage medium such as flash memory, hard disk, multimedia card, card-type memory 11, etc. In some embodiments, the readable storage medium may be an internal storage unit of the electronic device 1, such as the hard disk of the electronic device 1. In other embodiments, the readable storage medium may also be an external memory 11 of the electronic device 1, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the electronic device 1.

[0049] In this embodiment, the readable storage medium of the memory 11 is typically used to store the maintenance renewal program 10, etc., installed on the electronic device 1. The memory 11 can also be used to temporarily store data that has been output or will be output.

[0050] In some embodiments, processor 12 may be a central processing unit (CPU), microprocessor or other data processing chip, used to run program code stored in memory 11 or process data, such as executing renewal program 10.

[0051] The camera device 13 can be part of the electronic device 1 or independent of it. In some embodiments, the electronic device 1 is a terminal device with a camera, such as a smartphone, tablet, or laptop computer, in which case the camera device 13 is the camera of the electronic device 1. In other embodiments, the electronic device 1 can be a server, and the camera device 13 is independent of the electronic device 1 but connected to it via a network. For example, the camera device 13 is installed in a specific location, such as an office or a monitored area, to capture real-time images of targets entering that specific location and transmit the captured real-time images to the processor 12 via the network.

[0052] The network interface 14 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface), which is typically used to establish communication connections between the electronic device 1 and other electronic devices.

[0053] The communication bus 15 is used to enable communication between these visualization components.

[0054] Optionally, the electronic device 1 may also include a user interface, which may include an input unit such as a keyboard, a voice input device such as a microphone or other device with voice recognition function, a voice output device such as a speaker or headphones, etc. Optionally, the user interface may also include a standard wired interface or a wireless interface.

[0055] Optionally, the electronic device 1 may also include a display, which may also be referred to as a screen or display unit. In some embodiments, it may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an organic light-emitting diode (OLED) touchscreen, etc. The display is used to display information processed in the electronic device 1 and to display a visual user interface.

[0056] Optionally, the electronic device 1 also includes a touch sensor. The area provided by the touch sensor for user touch operation is called the touch area. Furthermore, the touch sensor described herein can be a resistive touch sensor, a capacitive touch sensor, etc. Moreover, the touch sensor includes not only contact-type touch sensors but also proximity-type touch sensors, etc. Furthermore, the touch sensor can be a single sensor or, for example, multiple sensors arranged in an array.

[0057] Furthermore, the area of ​​the display of the electronic device 1 can be the same as or different from the area of ​​the touch sensor. Optionally, the display and the touch sensor can be stacked to form a touch display screen. The device detects touch operations triggered by the user based on the touch display screen.

[0058] Optionally, the electronic device 1 may also include radio frequency (RF) circuits, sensors, audio circuits, etc., which will not be described in detail here.

[0059] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, visual components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0060] exist Figure 1 In the illustrated electronic device embodiment, the memory 11, which serves as a machine-readable medium, may include an operating system and an ultrasonic wave generating program 10; when the processor 12 executes the method stored in the memory 11, it implements as follows: Figure 4 The ultrasonic wave generation method shown is applied to an ultrasonic wave generating device, such as... Figure 2 As shown, the device includes:

[0061] The control module is used to generate an analog voltage and a control signal;

[0062] A voltage conversion module is used to receive the analog voltage and output a DC voltage based on the control of the analog voltage;

[0063] A signal generation module is used to receive the control signal and generate an adjustable square wave signal based on the control signal;

[0064] A power switch module is used to receive the adjustable square wave signal, change the switch state according to the adjustable square wave signal, and output a sinusoidal alternating voltage based on the change of the switch state and the DC voltage.

[0065] An ultrasonic transducer module is used to excite ultrasonic signals according to the sinusoidal alternating voltage.

[0066] In this invention, the frequency of the sinusoidal alternating voltage driving the ultrasonic transducer is fixed at the resonant frequency of the ultrasonic transducer. This frequency is generated by the DDS signal generation module (DDS generally refers to a DDS signal generator. The DDS signal generator uses Direct Digital Synthesis (DDS) technology to improve the frequency stability and accuracy of the signal generator to the same level as the reference frequency, and can perform fine frequency adjustment over a wide frequency range). The control module outputs an analog voltage. This analog voltage adjusts the reference voltage of the DC-DC converter module (a DC-DC converter is a device that converts electrical energy of one voltage value to electrical energy of another voltage value in a DC circuit), thereby adjusting the output voltage of the DC-DC converter. The output voltage of the DC-DC converter and the frequency output by the DDS drive the power switching module, which is then filtered so that the sinusoidal alternating voltage generated by the power switching module acts on the ultrasonic transducer, ultimately realizing the function of adjusting the output acoustic power of the ultrasonic transducer. Furthermore, the output power and voltage-current phase difference are monitored in real time to monitor the output status of the transducer.

[0067] This invention directly adjusts the analog voltage through a control module. Compared with existing technologies, its solution is more mature and has a lower cost.

[0068] The following describes the various components of the ultrasonic generator.

[0069] The control module can be a microcontroller. A microcontroller (Single-Chip Microcomputer) is an integrated circuit chip that uses very large-scale integrated circuit technology to integrate a central processing unit (CPU) with data processing capabilities, random access memory (RAM), read-only memory (ROM), various I / O ports and interrupt systems, timers / counters, and other functions (and may also include display driver circuits, pulse width modulation circuits, analog multiplexers, A / D converters, etc.) onto a single silicon chip to form a small but complete microcomputer system.

[0070] Specifically, an STM32F407 microcontroller can be used. The STM32F407 microcontroller generates an analog voltage and a control signal. The analog voltage is output through the microcontroller's integrated DA module (which converts digital signals to analog signals). If the microcontroller does not have an integrated DA module, the analog voltage is generated through an external DA module.

[0071] A voltage conversion module is used to convert the input DC voltage. Specifically, the voltage conversion module can be a DC-DC module, which converts the input DC voltage to another DC voltage. The voltage conversion module converts the input DC voltage into another DC voltage under the influence of an analog voltage signal.

[0072] The signal generation module receives control signals generated by the microcontroller and generates an adjustable square wave signal under the control of these signals. In this embodiment, a DDS signal generator is used to generate the square wave signal. The waveform signal generated using digital DDS technology has high resolution, good stability, a wide frequency range, and the system frequency will not drift over time.

[0073] A power switch module is used to receive the adjustable square wave signal, change the switching state according to the adjustable square wave signal, and output a sinusoidal alternating voltage based on the change of the switching state and the DC voltage. In this embodiment, the power switch module adopts a half-bridge power switch, i.e., a half-bridge. The circuit structure of the half-bridge is as follows: Figure 3 As shown, the upper and lower transistors are controlled by inverting signals. When one power transistor is on, the other is off. This results in a pulse signal at the output point OUT, with the voltage ranging from 0 to VHV. Filtering this pulse signal yields a sinusoidal alternating voltage. The control of a half-bridge circuit is existing technology for those skilled in the art, and will only be briefly explained here.

[0074] An ultrasonic transducer module, also known as an ultrasonic transducer, is a device that converts the electrical or magnetic energy output from a power switching module into mechanical vibrations at a consistent frequency. Currently, there are two main types of ultrasonic transducers: piezoelectric ceramic transducers and magnetostrictive transducers. In this embodiment, a piezoelectric ceramic transducer is used.

[0075] In one embodiment, the control module is further configured to acquire the output parameters of the ultrasonic signal and generate the analog voltage and the control signal based on the output parameters. Specifically, the control module acquires the acoustic power, modulation frequency, duty cycle, output time, and ultrasonic frequency of the ultrasonic signal, and generates a new analog voltage and the control signal based on the output parameters to ensure that the output acoustic power of the ultrasonic signal reaches the target acoustic power. The control module also monitors the phase difference between the output voltage and the output current in real time to monitor the transducer's operation.

[0076] In one embodiment, the device further includes a matching module, through which the power switch module supplies power to the ultrasonic transducer module.

[0077] The power switch module supplies power to the ultrasonic transducer module via a matching circuit, playing a crucial role in the ultrasonic generator. A well-designed matching circuit (matching module) significantly improves the electroacoustic conversion efficiency of the entire ultrasonic generator. Conversely, an improperly designed matching circuit reduces the electromechanical conversion efficiency of the ultrasonic generator, converting electrical energy into heat energy for the entire system. This increases the system temperature, alters the resonant frequency of the ultrasonic transducer, and in severe cases, can damage the piezoelectric transducer, causing unnecessary losses. The selection of the matching circuit is a conventional technique for those skilled in the art, and will not be described in detail in this embodiment.

[0078] Please see Figure 4 , Figure 4 An exemplary embodiment of the present invention provides a method for generating ultrasonic waves, the method utilizing the aforementioned ultrasonic wave generating device to generate ultrasonic waves, the method comprising:

[0079] To acquire the target electrical or acoustic power of the ultrasonic signal;

[0080] Based on the power curve, the target analog voltage is obtained, wherein the power curve is pre-calibrated and represents the relationship between the electrical power or acoustic power of the ultrasonic signal and the analog voltage.

[0081] The DC voltage output by the voltage conversion module is adjusted based on the target analog voltage, and the power switch module is controlled in combination with the DC voltage and the control signal. Then, the signal is filtered to make the power switch module output a sinusoidal alternating voltage. The sinusoidal alternating voltage is applied to the ultrasonic transducer module to excite an ultrasonic signal with the target acoustic power.

[0082] In one embodiment, the method for obtaining the power curve is as follows:

[0083] The electrical power of the ultrasonic signal under different analog voltages was obtained and the acoustic-to-electric conversion efficiency of the ultrasonic transducer was tested.

[0084] The power curves are obtained by fitting the different analog voltages and the corresponding electric power of the ultrasonic signals under the different analog voltages.

[0085] The power curve is represented as follows:

[0086] Y = a*(x / d) b +c;

[0087] Y represents the magnitude of the analog voltage, a, b, and c are the calibrated parameters, X represents the magnitude of the acoustic power output by the ultrasonic transducer, and d represents the acoustic-to-electrical conversion efficiency of the ultrasonic transducer.

[0088] In one embodiment, the method for obtaining the power curve is as follows:

[0089] Obtain the acoustic power of the ultrasonic signal corresponding to different analog voltages;

[0090] The power curves are obtained by fitting the acoustic power of the ultrasonic signals under different analog voltages and the corresponding analog voltages.

[0091] The power curve is represented as follows:

[0092] Y = a * x b +c;

[0093] Y represents the magnitude of the analog voltage, a, b, and c are the calibrated parameters, and X represents the magnitude of the acoustic power output by the ultrasonic transducer.

[0094] In one embodiment, the electrical or acoustic power of the ultrasonic signals under different analog voltages and the corresponding analog voltages is fitted using a matrix laboratory (MATLAB).

[0095] This invention sets a pre-fitted power curve representing the relationship between acoustic power and analog voltage. When the target acoustic power is to be obtained, the analog voltage can be obtained through the power curve. Ultrasonic waves are generated by calibrating and fitting the formula. This results in high control accuracy and stable output acoustic power.

[0096] It should be noted that since the embodiments of the method section correspond to the embodiments of the apparatus section, the content of the embodiments of the method section can be found in the description of the embodiments of the apparatus section, and will not be repeated here.

[0097] The present invention also provides a storage medium for storing a computer program, which is executed by a processor as follows: Figure 4 The ultrasonic wave generation method is shown.

[0098] The present invention also provides an electronic device, comprising:

[0099] Memory, used to store computer programs;

[0100] A processor is configured to execute a computer program stored in the memory, so that the device performs actions such as Figure 4 The ultrasonic wave generation method is shown.

[0101] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0102] The memory can be an internal storage unit or an external storage device, such as a plug-in hard drive, a smart media card (SMC), a secure digital card (SD), or a flash card. Furthermore, the memory may include both internal storage units and external storage devices. The memory is used to store the computer program, as well as other programs and data. The memory can also be used to temporarily store data that has been output or will be output.

[0103] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0106] In the embodiments provided by this invention, it should be understood that the disclosed apparatus / terminal devices and methods can be implemented in other ways. For example, the apparatus / terminal device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0107] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0108] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0109] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0110] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An ultrasonic generator, characterized in that, The device includes: A control module is used to generate an analog voltage and a control signal; wherein, the control module is a microcontroller; A voltage conversion module is used to receive the analog voltage and output a DC voltage based on the control of the analog voltage; wherein the analog voltage is determined based on a pre-calibrated power curve and the electrical or acoustic power of the ultrasonic signal, and the power curve represents the relationship between the electrical or acoustic power of the ultrasonic signal and the analog voltage. A signal generation module is used to receive the control signal and generate an adjustable square wave signal based on the control signal; A power switch module is used to receive the adjustable square wave signal, change the switch state according to the adjustable square wave signal, and output a sinusoidal alternating voltage based on the change of the switch state and the DC voltage. An ultrasonic transducer module is used to excite ultrasonic signals according to the sinusoidal alternating voltage.

2. The ultrasonic generator according to claim 1, characterized in that, The control module is also used to acquire the output parameters of the ultrasonic signal, and generate the analog voltage and the control signal according to the output parameters.

3. The ultrasonic generator according to claim 2, characterized in that, The output parameters include output acoustic power, modulation frequency, duty cycle, output time, and output ultrasonic frequency.

4. The ultrasonic generator according to claim 1, characterized in that, The control module is a microcontroller.

5. The ultrasonic generator according to claim 1, characterized in that, The power switch module is a half-bridge power switch.

6. The ultrasonic generator according to claim 1, characterized in that, The device further includes a matching module, through which the power switch module provides a sinusoidal alternating voltage to the ultrasonic transducer module.

7. A method for generating ultrasound, characterized in that, The method of generating ultrasonic waves using the ultrasonic generator as described in any one of claims 1 to 6 includes: To acquire the target electrical or acoustic power of the ultrasonic signal; Based on the power curve, the target analog voltage is obtained, wherein the power curve is pre-calibrated and represents the relationship between the electrical power or acoustic power of the ultrasonic signal and the analog voltage. The DC voltage output by the voltage conversion module is adjusted based on the target analog voltage, and the power switch module is controlled in combination with the DC voltage and the control signal to make the power switch module output a sinusoidal alternating voltage; the sinusoidal alternating voltage is applied to the ultrasonic transducer module to excite the ultrasonic signal of the target acoustic power.

8. The ultrasonic wave generation method according to claim 7, characterized in that, The method for obtaining the power curve is as follows: The electrical power of the ultrasonic signal under different analog voltages was obtained and the acoustic-to-electric conversion efficiency of the ultrasonic transducer was tested. The power curves are obtained by fitting the different analog voltages and the corresponding electric power of the ultrasonic signals under the different analog voltages. The power curve is represented as follows: Y=a (x / d) b +c; Y represents the magnitude of the analog voltage, a, b, and c are the calibrated parameters, X represents the magnitude of the acoustic power output by the ultrasonic transducer, and d represents the acoustic-to-electrical conversion efficiency of the ultrasonic transducer.

9. The ultrasonic wave generation method according to claim 7, characterized in that, The method for obtaining the power curve is as follows: Obtain the acoustic power of the ultrasonic signal corresponding to different analog voltages; The power curves are obtained by fitting the acoustic power of the ultrasonic signals under different analog voltages and the corresponding analog voltages. The power curve is represented as follows: Y=a x b +c Y represents the magnitude of the analog voltage, a, b, and c are the calibrated parameters, and X represents the magnitude of the acoustic power output by the ultrasonic transducer.

10. The ultrasonic wave generation method according to claim 8 or 9, characterized in that, The matrix laboratory was used to fit the electrical or acoustic power of the ultrasonic signals under different analog voltages.

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