Transducer driving method and system and storage medium

Abstract

The invention provides a transducer driving method and system and a storage medium, and the method comprises the steps: driving a transducer through power supply equipment, collecting the driving voltage of the power supply equipment, obtaining a function of the driving current of the power supply equipment and the frequency of the transducer based on the impedance characteristic of the transducer, and then collecting the driving current corresponding to a subdivision frequency band, and performing integral operation on the driving current of each subdivided frequency band to obtain the maximum value of the integral operation, and finally driving the transducer according to the frequency corresponding to the maximum value of the integral operation. According to the invention, the driving power of the transducer in a certain frequency is calculated through the calculus algorithm, so that the resonant frequency of the transducer is rapidly and accurately obtained, and compared with the prior art, automatic matching of the resonant frequency can be realized, abnormal current peaks can be avoided, and errors of the obtained resonant frequency can be reduced.

Description

Technical Field

[0001] The present application relates to the field of transducer technology, and in particular to a transducer driving method, system and storage medium. Background Art

[0002] A transducer is a device that converts one form of energy into another. Depending on its application and the type of energy conversion, transducers can have a variety of roles. Each transducer is designed for a specific application to achieve efficient conversion from one form of energy to another. These conversions play a key role in a variety of fields, from audio and video equipment in daily life to complex industrial control systems and medical diagnostic equipment.

[0003] For ultrasonic piezoelectric ceramic transducers, their working principle is mainly based on the piezoelectric effect or magnetostrictive effect, which converts electrical energy into mechanical vibration. In order to make the ultrasonic piezoelectric ceramic transducer at the best working frequency, the resonant frequency should be used to drive the ultrasonic piezoelectric ceramic transducer.

[0004] There are generally two types of ultrasonic piezoelectric ceramic transducer drivers for ultrasonic cleaning and ultrasonic washing on the market: The method is to first measure the fixed resonant frequency and then drive the transducer according to the resonant frequency. This frequency is fixed, which places high requirements on the manufacturing and working tip of the transducer, and the measurement is cumbersome.

[0005] The resonant frequency of the transducer is determined by reading the current. This method can achieve automatic matching, but errors may occur and the matching frequency may be inaccurate, resulting in abnormal driving. Summary of the invention

[0006] In order to solve the above technical problems, the present application provides a transducer driving method, system and storage medium, which use a function integral method to obtain the resonant frequency of the transducer.

[0007] In a first aspect, the present application provides a transducer driving method, comprising the following steps: Step 1: Drive the transducer through the power supply device and collect the driving current of the power supply device.

[0008] Step 2: Based on the impedance characteristics of the transducer, a function of the driving current of the power supply device and the frequency of the transducer is obtained.

[0009] Step 3: Perform an integral operation on the function to obtain the maximum value of the integral operation.

[0010] Step 4: driving the transducer according to the frequency corresponding to the maximum value of the integral operation.

[0011] Through the method proposed in the present application, the resonant frequency of the transducer can be quickly and accurately obtained based on integral calculation, and abnormal current spikes can be avoided, thereby reducing the error of the obtained resonant frequency.

[0012] Furthermore, the impedance characteristic is that the resistance of the transducer changes with the frequency of the transducer.

[0013] Furthermore, the impedance characteristic includes: a minimum impedance point.

[0014] The minimum impedance point usually refers to the resonance point, that is, the situation where the impedance of the circuit reaches the minimum value at a specific frequency. Finding the minimum impedance point can help determine the operating frequency range of the transducer and the conditions for obtaining the best performance at that frequency.

[0015] Furthermore, the minimum impedance point corresponds to the resonant frequency of the transducer.

[0016] Resonant frequency refers to the specific frequency in a physical system at which the system will produce maximum amplitude when subjected to external stimulation. When the external frequency is equal to the resonant frequency of the system, the system will resonate and the amplitude will reach its maximum value.

[0017] Furthermore, the function takes the driving current of the power supply device as the Y-axis and the frequency of the transducer as the X-axis.

[0018] Through this design, a functional relationship diagram of the driving current of the power supply device and the frequency of the transducer can be obtained, which is convenient for subsequent integral operations.

[0019] Furthermore, the resonant frequency corresponds to the maximum driving current of the power supply device.

[0020] When the transducer is at the resonant frequency, that is, when its impedance reaches the minimum value, the driving current of the corresponding power supply device is at the maximum value.

[0021] Furthermore, the step 3 is specifically as follows: Step 31: Collect the driving current corresponding to the subdivided frequency segment.

[0022] Step 32: Integrate the driving current of each subdivided frequency segment and obtain the maximum value of the integral operation.

[0023] Each subdivided frequency segment only occupies a very small interval and can be approximately equivalent to a frequency. Integrating each subdivided frequency segment and obtaining the maximum value of the integral operation can be approximately equivalent to the frequency of the transducer corresponding to the maximum driving current of the power supply device. Through this design, abnormal current spikes can be avoided and the error of the obtained resonant frequency can be reduced.

[0024] In a second aspect, the present application proposes a system for a transducer driving method, which is characterized by specifically comprising: The first driving module is used to drive the transducer through the power supply device and collect the driving current of the power supply device.

[0025] The function generation module is used to obtain a function comparison diagram of the driving current of the power supply device and the frequency of the transducer based on the impedance characteristics of the transducer.

[0026] The integral operation module is used to perform an integral operation on the function comparison diagram to obtain a maximum value of the integral operation.

[0027] And, a second driving module is used to drive the transducer according to the driving current corresponding to the maximum value of the integral operation.

[0028] Furthermore, the function generation module also includes: The first acquisition unit is used to acquire the driving current corresponding to the subdivided frequency segment.

[0029] Operation unit: used to perform integration operation on the driving current of each subdivided frequency band and obtain the maximum value of the integration operation.

[0030] On the third aspect, based on the same inventive concept, the present application also proposes a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a control processor, the transducer driving method as described is implemented.

[0031] It should be noted that, since the computer-readable storage medium in this embodiment and the transducer driving method in the above embodiment are based on the same inventive concept, the corresponding contents in the method embodiment are also applicable to the system embodiment and will not be described in detail here.

[0032] To summarize, the present application proposes a transducer driving method, system and storage medium, which drives the transducer through a power supply device and collects the driving voltage of the power supply device, and then obtains the function of the driving current of the power supply device and the frequency of the transducer based on the impedance characteristics of the transducer, and then integrates the function to obtain the maximum value of the integral operation, and finally drives the transducer according to the frequency corresponding to the maximum value of the integral operation.

[0033] Through this invention design, the following beneficial effects can be achieved: The transducer driving method proposed in the present application can greatly reduce the error of the acquired resonant frequency.

[0034] The transducer driving method proposed in the present application enables the transducer to operate within a good operating frequency range, thereby reducing heat generation and extending service life.

[0035] When the resonant frequency of the transducer changes, the transducer driving method proposed in the present application can still quickly match the resonant frequency, so that the transducer always operates in the optimal operating frequency range.

[0036] After the transducer ages, the resonant frequency will shift. The transducer driving method proposed in this application can also enable the transducer to work normally.

[0037] Compared with the prior art, this application has at least the following beneficial effects: In the process of the power supply device driving the transducer, the driving current is collected and calculus operations are performed within the unit frequency. The driving power of the transducer within a certain frequency is calculated using the calculus algorithm, so as to quickly and accurately obtain the resonant frequency of the transducer. Compared with the existing technology, this invention design can automatically match the resonant frequency, avoid abnormal current spikes, and reduce the error of the obtained resonant frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a flowchart of the assisted driving method shown in an embodiment of the present application.

[0039] Figure 2 This is a schematic diagram of constructing the driving habit model of this application.

[0040] Figure 3 This is a schematic diagram for calculating the optimal driving route for this application.

[0041] Figure 4 This is a path diagram of the assisted driving system of this application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1:

[0043] A transducer is a device that converts one form of energy into another form of energy. It is widely used in various sensors, actuators and measurement systems. The types of transducers include electroacoustic transducers, electro-optical transducers or ultrasonic transducers. Among them, ultrasonic transducers are transducers that convert electrical energy or other energy into mechanical energy. For such transducers, it is particularly important to confirm the resonant frequency of the transducer.

[0044] In the embodiment of the present invention, optionally, an ultrasonic piezoelectric ceramic transducer (hereinafter referred to as transducer) is used.

[0045] This application proposes a transducer driving method, as shown in the attached Figure 1 As shown, specifically including: Step 1: Drive the transducer through the power supply device and collect the driving current of the power supply device.

[0046] Step 2: Based on the impedance characteristics of the transducer, a function of the driving current of the power supply device and the frequency of the transducer is obtained.

[0047] Step 3: Perform an integral operation on the function to obtain the maximum value of the integral operation.

[0048] Step 4: driving the transducer according to the frequency corresponding to the maximum value of the integral operation.

[0049] The transducer is widely used in the medical field, the industrial field and the cleaning field. In the embodiment of the present invention, it is mainly used in the field of ultrasonic tooth cleaning and ultrasonic root canal washing, and is used for tooth cleaning and root canal washing and cleaning, but is not limited thereto.

[0050] In the embodiment of the present invention, optionally, taking an automatic toothbrush as an example, the working principle of the automatic toothbrush is to convert electrical energy into mechanical energy to achieve high-speed vibration of the brush head to achieve the effect of cleaning teeth. In this process, the transducer plays the role of converting electrical energy into mechanical energy.

[0051] The invention design proposed in this application is aimed at obtaining the resonant frequency of the automatic toothbrush before it works. After obtaining the accurate resonant frequency, the transducer of the automatic toothbrush is driven with the resonant frequency, so that the transducer of the automatic toothbrush can be placed in the optimal working frequency range. The usual detection time is about a few seconds.

[0052] Furthermore, the impedance characteristic is that the resistance of the transducer changes with the frequency of the transducer.

[0053] Furthermore, the impedance characteristic includes: a minimum impedance point.

[0054] The impedance characteristics of a transducer depend on its type, operating principle, and the characteristics of its internal components. Understanding the impedance characteristics of a transducer helps to correctly apply and design circuits to ensure the accuracy and efficiency of signal transmission. In practical applications, impedance matching is usually required according to specific circumstances to optimize system performance.

[0055] In the embodiment of the present invention, optionally, as shown in the attached Figure 2 As shown in the figure, the impedance characteristic diagram of the transducer was obtained by the impedance analyzer. Figure 2 It can be seen that the impedance characteristics of the transducer change with the frequency of the transducer, where the minimum value is the minimum impedance point fs and the maximum value is the maximum impedance point fp.

[0056] Furthermore, the minimum impedance point corresponds to the resonant frequency of the transducer.

[0057] In the embodiment of the present invention, optionally, the frequency of the transducer corresponding to the minimum impedance point of the transducer is the resonant frequency of the transducer.

[0058] Furthermore, the function takes the driving current of the power supply device as the Y-axis and the frequency of the transducer as the X-axis.

[0059] Through this design, a functional relationship diagram of the driving current of the power supply device and the frequency of the transducer can be obtained, which is convenient for subsequent integral operations.

[0060] In the embodiment of the present invention, as shown in the attached Figure 3 As shown, it is a graph showing the relationship between the driving current of the power supply device and the frequency function of the transducer.

[0061] Furthermore, the resonant frequency corresponds to the maximum driving current of the power supply device.

[0062] When the transducer is at the resonant frequency, that is, when its impedance reaches the minimum value, the driving current of the corresponding power supply device is at the maximum value.

[0063] In the embodiment of the present invention, optionally, as shown in the attached Figure 3 As shown, when the driving current is at the maximum value, ie, close to 300 mA, the frequency of the transducer is between 28500 Hz and 29000 Hz, and the resonant frequency of the transducer is also in this range.

[0064] Furthermore, the step 3 is specifically as follows: Step 31: Collect the driving current corresponding to the subdivided frequency segment.

[0065] Step 32: Integrate the driving current of each subdivided frequency segment and obtain the maximum value of the integral operation.

[0066] Each subdivided frequency segment only occupies a very small interval and can be approximately equivalent to a frequency. Integrating each subdivided frequency segment and obtaining the maximum value of the integral operation can be approximately equivalent to the frequency of the transducer corresponding to the maximum driving current of the power supply device. Through this design, abnormal current spikes can be avoided and the error of the obtained resonant frequency can be reduced.

[0067] In the embodiment of the present invention, optionally, as shown in the attached Figure 4As shown, in the process of collecting the driving current, abnormal current spikes will appear. If the resonant frequency of the transducer is directly determined by the maximum value of the driving current, misjudgment may occur and the error is large. The embodiment of the present invention collects the current value of the subdivided frequency segment and then integrates the current value. In the frequency range of 2.7~3kHz, the current of 2.7~2.75kHz, 2.75~2.8kHz, 2.8~2.85kHz... is integrated to obtain the maximum value of the operation, which is the resonant frequency interval of the transducer, so as to quickly and accurately match the operating frequency of the transducer.

[0068] In the embodiment of the present invention, optionally, as shown in the attached Figure 4 As shown, point A is an abnormal current spike. If the resonant frequency of the transducer is directly determined by the maximum value of the driving current, point A will be mistaken for the resonant frequency, but the difference between point A and the actual resonant frequency point is large. By judging the resonant frequency with the inventive design proposed in this application, point A can be effectively filtered to obtain a true and accurate resonant frequency.

[0069] In the embodiment of the present invention, optionally, after the resonant frequency of the transducer is obtained, the transducer is driven to work at the resonant frequency. The methods that can be used include: driving with a pulse information, or driving with a mechanical device, etc., one of which is not limited to, and it is only necessary to ensure that the frequency of the signal driving the transducer is the resonant frequency. Embodiment 2:

[0070] The present application proposes a system for a transducer driving method, which specifically includes: The first driving module is used to drive the transducer through the power supply device and collect the driving current of the power supply device.

[0071] The function generation module is used to obtain a function comparison diagram of the driving current of the power supply device and the frequency of the transducer based on the impedance characteristics of the transducer.

[0072] The integral operation module is used to perform an integral operation on the function comparison diagram to obtain a maximum value of the integral operation.

[0073] And, a second driving module is used to drive the transducer according to the driving current corresponding to the maximum value of the integral operation.

[0074] Furthermore, the function generation module also includes: The first acquisition unit is used to acquire the driving current corresponding to the subdivided frequency segment.

[0075] Operation unit: used to perform integration operation on the driving current of each subdivided frequency band and obtain the maximum value of the integration operation.

[0076] The first driving module is mainly composed of a power supply device, which may be a voltage source, a current source or a transformer, but is not limited thereto. In an embodiment of the present invention, optionally, the power supply device used is a transformer.

[0077] The function generation module is mainly used for data processing. In the embodiment of the present invention, it is optionally composed of a computer device. In other embodiments, the same function can also be achieved by using devices such as a single-chip microcomputer or FPGA, but it is not limited to this.

[0078] The integral operation module is mainly used for data processing. In the embodiment of the present invention, it is optionally composed of a computer device. In other embodiments, the same function can also be achieved by using devices such as a single-chip microcomputer or FPGA, but it is not limited to this.

[0079] The second driving module is mainly used to drive the transducer using a resonant frequency. The device used may be any signal generator that can generate a resonant frequency. In the embodiment of the present invention, the signal generator used is composed of an oscillator circuit, but is not limited thereto.

[0080] On the third aspect, based on the same inventive concept, the present application also proposes a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a control processor, the transducer driving method as described is implemented.

[0081] It should be noted that, since the computer-readable storage medium in this embodiment and the transducer driving method in the above embodiment are based on the same inventive concept, the corresponding contents in the method embodiment are also applicable to the system embodiment and will not be described in detail here.

[0082] To summarize, the present application proposes a transducer driving method, system and storage medium, which drives the transducer through a power supply device and collects the driving voltage of the power supply device, and then obtains the function of the driving current of the power supply device and the frequency of the transducer based on the impedance characteristics of the transducer, and then integrates the function to obtain the maximum value of the integral operation, and finally drives the transducer according to the frequency corresponding to the maximum value of the integral operation.

[0083] Through this invention design, the following beneficial effects can be achieved: The transducer driving method proposed in the present application can greatly reduce the error of the acquired resonant frequency.

[0084] The transducer driving method proposed in the present application enables the transducer to operate within a good operating frequency range, thereby reducing heat generation and extending service life.

[0085] When the resonant frequency of the transducer changes, the transducer driving method proposed in the present application can still quickly match the resonant frequency, so that the transducer always operates in the optimal operating frequency range.

[0086] After the transducer ages, the resonant frequency will shift. The transducer driving method proposed in this application can also enable the transducer to work normally.

[0087] The invention design proposed in this application, in the process of the power supply device driving the transducer, collects the driving current and performs calculus operations within the unit frequency, and uses the calculus algorithm to calculate the driving power of the transducer within a certain frequency, so as to quickly and accurately obtain the resonant frequency of the transducer. Compared with the existing technology, this invention design can automatically match the resonant frequency, avoid abnormal current spikes, and reduce the error of the obtained resonant frequency.

[0088] In several embodiments provided in the present application, it is understood that each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.

[0089] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can essentially or in other words, the part that contributes 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 several instructions for an electronic device to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0090] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A transducer driving method, characterized in that: The following steps are involved: S1: driving the transducer through the power supply device and collecting the driving current of the power supply device; S2: Based on the impedance characteristics of the transducer, a function of the driving current of the power supply device and the frequency of the transducer is obtained; S3: performing an integral operation on the function to obtain a maximum value of the integral operation; S4: driving the transducer according to the frequency corresponding to the maximum value of the integral operation.

2. The transducer driving method according to claim 1, characterized in that: The impedance characteristic is that the resistance of the transducer changes with the frequency of the transducer.

3. The transducer driving method according to claim 2, characterized in that: The impedance characteristic includes: a minimum impedance point.

4. The transducer driving method according to claim 3, characterized in that: The minimum impedance point corresponds to the resonant frequency of the transducer.

5. The transducer driving method according to claim 4, characterized in that: The function takes the driving current of the power supply device as the Y-axis and the frequency of the transducer as the X-axis.

6. The transducer driving method according to claim 5, characterized in that: Based on the function, the resonant frequency corresponds to the maximum driving current of the power supply device.

7. The transducer driving method according to claim 6, characterized in that: The step S3 is specifically as follows: S31: collecting the driving current corresponding to the subdivided frequency segment; S32: performing an integration operation on the driving current of each subdivided frequency segment, and obtaining a maximum value of the integration operation.

8. A system for a transducer driving method, characterized in that: Specifically include: A first driving module, used to drive the transducer through a power supply device and collect a driving current of the power supply device; A function generation module, used to obtain a function comparison diagram of the driving current of the power supply device and the frequency of the transducer based on the impedance characteristics of the transducer; An integral operation module, used for performing an integral operation on the function comparison chart to obtain a maximum value of the integral operation; And, a second driving module is used to drive the transducer according to the driving current corresponding to the maximum value of the integral operation.

9. A transducer driving system according to claim 7, characterized in that: The function generation module also includes: The first acquisition unit is used to acquire the driving current corresponding to the subdivided frequency segment; Operation unit: used to perform integration operation on the driving current of each subdivided frequency band and obtain the maximum value of the integration operation.

10. A computer-readable storage medium storing computer-executable instructions, characterized in that: When the computer executable instructions are executed by the control processor, the transducer driving method according to claims 1-7 is implemented.

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