CN114217647A - Control method and device of ultrasonic transducer and ultrasonic device - Google Patents
Control method and device of ultrasonic transducer and ultrasonic device Download PDFInfo
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- CN114217647A CN114217647A CN202111547724.4A CN202111547724A CN114217647A CN 114217647 A CN114217647 A CN 114217647A CN 202111547724 A CN202111547724 A CN 202111547724A CN 114217647 A CN114217647 A CN 114217647A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D19/00—Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase
- G05D19/02—Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase characterised by the use of electric means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
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Abstract
The application provides a control method and device of an ultrasonic transducer and an ultrasonic device. The method comprises the following steps: generating driving signals of different frequencies; determining the natural frequency of the ultrasonic transducer according to the amplitudes of the plurality of response current signals; and driving the ultrasonic transducer to work by adopting the natural frequency. In the scheme, the generated driving signal has a certain frequency, the ultrasonic transducer can output a corresponding response current signal under the driving of the driving signal, and further can achieve the cleaning effect, the ultrasonic transducer has natural frequency due to the attribute of the ultrasonic transducer and the influence of the working environment of the ultrasonic transducer, the frequency of the driving signal is equal to the natural frequency, the ultrasonic transducer can generate resonance phenomenon, the ultrasonic transducer is driven according to the driving signal which is the same as the natural frequency, and compared with the scheme of cleaning through a certain frequency or several fixed frequencies in the prior art, the scheme can achieve better cleaning effect.
Description
Technical Field
The present disclosure relates to the field of ultrasonic transducers, and in particular, to a method and an apparatus for controlling an ultrasonic transducer, a computer-readable storage medium, and an ultrasonic apparatus.
Background
Ultrasonic cleaning machines in the market at present are cleaned through a certain frequency or several fixed frequencies, and the cleaning mode cannot be suitable for different application scenes. The household kitchen ware can be different in material, different in cleaning object and different in water amount during cleaning, and the resonant frequency of the transducer matched with different scenes and different cleaning objects is required to be found, so that the best cleaning effect is achieved.
Disclosure of Invention
The present application mainly aims to provide a method and an apparatus for controlling an ultrasonic transducer, a computer-readable storage medium, and an ultrasonic apparatus, so as to solve the problem of poor cleaning effect of the ultrasonic transducer in the prior art.
In order to achieve the above object, according to an aspect of the present application, there is provided a control method of an ultrasonic transducer, including: generating driving signals with different frequencies, wherein the driving signals are used for driving the ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals; determining a natural frequency of the ultrasonic transducer according to the amplitudes of the plurality of response current signals; and driving the ultrasonic transducer to work by adopting the natural frequency.
Further, determining a natural frequency of the ultrasonic transducer from the amplitudes of the plurality of response current signals comprises: rectifying each response current signal to obtain a rectified signal; filtering each rectified signal to obtain a filtered signal; and determining the natural frequency of the ultrasonic transducer according to the amplitude of each filtering signal.
Further, determining the natural frequency of the ultrasonic transducer according to the amplitude of each of the filtered signals includes: converting each of the filtered signals into a voltage signal; and determining the natural frequency of the ultrasonic transducer according to the amplitude of each voltage signal.
Further, determining the natural frequency of the ultrasonic transducer according to the amplitude of each voltage signal comprises: and determining the frequency of the driving signal corresponding to the voltage signal with the maximum amplitude as the natural frequency.
Further, in the process of driving the ultrasonic transducer to work by using the natural frequency, the method further comprises the following steps: determining whether an external environment of the ultrasonic transducer has changed; in the event of a change in the external environment, the natural frequency of the ultrasonic transducer is redetermined.
Further, determining whether the external environment of the ultrasonic transducer has changed comprises: acquiring the amplitude of the voltage signal of the driving ultrasonic transducer driven by the natural frequency; determining that the external environment of the ultrasonic transducer is changed when the absolute value of the difference between the amplitude of the voltage signal and a first predetermined amplitude is greater than a predetermined value, wherein the first predetermined amplitude is the maximum value of the amplitude of the voltage signal obtained in a frequency sweep stage, and the frequency sweep stage is a stage of driving the ultrasonic transducer by using the driving signals with different frequencies.
Further, the method further comprises: determining whether the magnitude of the voltage signal is greater than a second predetermined magnitude; and in the case of being larger than the second predetermined amplitude, reducing the duty ratio of the driving signal so that the amplitude of the voltage signal is smaller than or equal to the second predetermined amplitude.
According to another aspect of the present application, there is provided a control apparatus of an ultrasonic transducer, including: the generating unit is used for generating driving signals with different frequencies, the driving signals are used for driving the ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals; a first determination unit for determining the natural frequency of the ultrasonic transducer according to the amplitudes of the plurality of response current signals; and the driving unit is used for driving the ultrasonic transducer to work by adopting the natural frequency.
According to yet another aspect of the present application, there is provided a computer-readable storage medium comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform any of the methods described herein.
According to another aspect of the application, there is provided an ultrasound device comprising an ultrasound transducer, one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods.
According to the technical scheme, driving signals with different frequencies are generated firstly, the driving signals are used for driving the ultrasonic transducers, the ultrasonic transducers output corresponding response current signals under the driving of the driving signals, then the natural frequency of the ultrasonic transducers is determined according to the amplitude values of a plurality of response current signals, and finally the ultrasonic transducers are driven to work by adopting the natural frequency. In the scheme, the generated driving signal has a certain frequency, the ultrasonic transducer can output a corresponding response current signal under the driving of the driving signal, and further can achieve the cleaning effect, the ultrasonic transducer has natural frequency due to the attribute of the ultrasonic transducer and the influence of the working environment of the ultrasonic transducer, the frequency of the driving signal is equal to the natural frequency, the ultrasonic transducer can generate resonance phenomenon, the ultrasonic transducer is driven according to the driving signal which is the same as the natural frequency, and compared with the scheme of cleaning through a certain frequency or several fixed frequencies in the prior art, the scheme can achieve better cleaning effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a schematic flow diagram of a method of controlling an ultrasonic transducer according to an embodiment of the application;
FIG. 2(a) shows a response current signal waveform diagram for two frequencies;
FIG. 2(b) shows a schematic of voltage signals at two frequencies;
fig. 3 is a schematic structural diagram illustrating a control device of an ultrasonic transducer according to an embodiment of the present application;
fig. 4 shows a flow chart of a further method for controlling an ultrasonic transducer according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
According to embodiments of the present application, a method and apparatus for controlling an ultrasonic transducer, a computer-readable storage medium, and an ultrasonic apparatus are provided.
Fig. 1 is a flowchart of a control method of an ultrasonic transducer according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, generating driving signals with different frequencies, wherein the driving signals are used for driving ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals;
step S102, determining the natural frequency of the ultrasonic transducer according to the amplitudes of a plurality of response current signals;
and step S103, driving the ultrasonic transducer to work by adopting the natural frequency.
In the method, driving signals with different frequencies are generated firstly, the driving signals are used for driving the ultrasonic transducers, the ultrasonic transducers output corresponding response current signals under the driving of the driving signals, then the natural frequency of the ultrasonic transducers is determined according to the amplitudes of a plurality of response current signals, and finally the ultrasonic transducers are driven to work by adopting the natural frequency. In the scheme, the generated driving signal has a certain frequency, the ultrasonic transducer can output a corresponding response current signal under the driving of the driving signal, and further can achieve the cleaning effect, the ultrasonic transducer has natural frequency due to the attribute of the ultrasonic transducer and the influence of the working environment of the ultrasonic transducer, the frequency of the driving signal is equal to the natural frequency, the ultrasonic transducer can generate resonance phenomenon, the ultrasonic transducer is driven according to the driving signal which is the same as the natural frequency, and compared with the scheme of cleaning through a certain frequency or several fixed frequencies in the prior art, the scheme can achieve better cleaning effect.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In one embodiment of the present application, determining the natural frequency of the ultrasonic transducer according to the amplitudes of a plurality of the response current signals includes: rectifying each response current signal to obtain a rectified signal; filtering each rectified signal to obtain a filtered signal; and determining the natural frequency of the ultrasonic transducer according to the amplitude of each filtering signal. In this embodiment, because the response current signal is rectified and filtered, the stability of the signal can be ensured to be good, and an interference signal can be filtered, so that the accuracy of the amplitude of the obtained filtered signal can be ensured to be good, and further, the natural frequency of the ultrasonic transducer can be determined more accurately.
Specifically, as shown in fig. 2(a), the peak value of the response current signal in the upper graph of fig. 2(a) is larger than the peak value of the response current signal in the lower graph of fig. 2(a), and then the amplitudes of the two filtered signals are respectively determined.
In yet another embodiment of the present application, determining the natural frequency of the ultrasonic transducer according to the amplitude of each of the filtering signals includes: converting each of the filtered signals into a voltage signal; and determining the natural frequency of the ultrasonic transducer according to the amplitude of each voltage signal. In this embodiment, the current signal is converted into the voltage signal, the current signal may be converted by a circuit for converting the current signal into the voltage signal, a resistor may be added to the circuit, and when the current flows through the resistor, the current is converted into the voltage signal, and then the amplitude of the voltage signal is determined, so as to determine the natural frequency of the ultrasonic transducer more accurately.
Specifically, as shown in fig. 2(b), the voltage signal in the upper graph of fig. 2(b) is converted from the response current signal in the upper graph of fig. 2(a), and the voltage signal in the lower graph of fig. 2(b) is converted from the response current signal in the lower graph of fig. 2 (a).
In another embodiment of the present application, determining the natural frequency of the ultrasonic transducer according to the amplitude of each of the voltage signals includes: the frequency of the drive signal corresponding to the voltage signal having the largest amplitude is determined as the natural frequency. In this embodiment, the frequency of the driving signal may be multiple, one voltage signal corresponds to one driving signal of one frequency, the voltage signal with the largest amplitude indicates that resonance occurs, and the frequency of the driving signal corresponding to the voltage signal with the largest amplitude is determined as the natural frequency, which may further ensure that the accuracy of the obtained natural frequency is better.
In another embodiment of the present application, in the process of driving the ultrasonic transducer to operate by using the natural frequency, the method further includes: determining whether the external environment of the ultrasonic transducer is changed; and re-determining the natural frequency of the ultrasonic transducer when the external environment is changed. In this embodiment, when the external environment changes, the natural frequency of the ultrasonic transducer needs to be determined again, so that the natural frequency of the ultrasonic transducer can be ensured to be accurate under different environments.
In one embodiment, the ultrasonic transducer is installed in the dishwasher, the ultrasonic transducer corresponds to a natural frequency, and when the ultrasonic transducer is placed in a water tank to clean components, the ultrasonic transducer corresponds to another natural frequency, namely the external environment of the ultrasonic transducer is changed, and if the external environment is changed, the natural frequency of the ultrasonic transducer needs to be readjusted.
In a specific embodiment of the present application, determining whether the external environment of the ultrasonic transducer changes includes: acquiring the amplitude of the voltage signal of the driving ultrasonic transducer under the driving of the natural frequency; and determining that the external environment of the ultrasonic transducer is changed under the condition that the absolute value of the difference value between the amplitude of the voltage signal and a first preset amplitude is larger than a preset value, wherein the first preset amplitude is the maximum value of the amplitude of the voltage signal obtained in a frequency sweeping stage, and the frequency sweeping stage is a stage for driving the ultrasonic transducer by adopting the driving signals with different frequencies. In this embodiment, when the absolute value of the difference between the amplitude of the voltage signal and the first predetermined amplitude is greater than the predetermined value, it may be accurately determined that the external environment of the ultrasonic transducer has changed, and the natural frequency of the ultrasonic transducer may be further efficiently and accurately adjusted according to the determination result.
Specifically, the frequency sweeping stage is a stage of driving the ultrasonic transducer by a driving signal with a default frequency, for example, starting from 20KHz, sequentially sweeping frequencies from small to large, wherein a step length is 10KHz, sequentially sweeping frequencies from 30KHz, 40KHz, 50KHz and 60KHz, and a maximum value is 60 KHz.
In order to perform power protection on the ultrasonic transducer and ensure that the safety of the use of the ultrasonic transducer is good, in another specific embodiment of the present application, the method further includes: determining whether the amplitude of the voltage signal is greater than a second predetermined amplitude; and in the case of being larger than the second predetermined amplitude, reducing the duty ratio of the driving signal so that the amplitude of the voltage signal is smaller than or equal to the second predetermined amplitude. For example, the duty cycle is reduced from 50% to 45%.
Specifically, the second predetermined amplitude is the maximum amplitude, that is, the amplitude of the warning, for example, the second predetermined amplitude is set to 15V, and when the amplitude of the collected voltage signal is 20V, the duty ratio of the driving signal is reduced, so that the amplitude of the voltage signal can be reduced.
The embodiment of the present application further provides a control device for an ultrasonic transducer, and it should be noted that the control device for an ultrasonic transducer according to the embodiment of the present application may be used to execute the control method for an ultrasonic transducer according to the embodiment of the present application. The following describes a control device for an ultrasonic transducer according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a control device of an ultrasonic transducer according to an embodiment of the present application. As shown in fig. 3, the apparatus includes:
a generating unit 10, configured to generate driving signals with different frequencies, where the driving signals are used to drive ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals;
a first determining unit 20 for determining the natural frequency of the ultrasonic transducer according to the amplitudes of the plurality of response current signals;
and a driving unit 30 for driving the ultrasonic transducer to operate by using the natural frequency.
In the above-described apparatus, the generating means generates drive signals of different frequencies for driving the ultrasonic transducers, the ultrasonic transducers output corresponding response current signals when driven by the respective drive signals, the first determining means determines the natural frequency of the ultrasonic transducers based on the amplitudes of the plurality of response current signals, and the driving means drives the ultrasonic transducers to operate using the natural frequency. In the scheme, the generated driving signal has a certain frequency, the ultrasonic transducer can output a corresponding response current signal under the driving of the driving signal, and further can achieve the cleaning effect, the ultrasonic transducer has natural frequency due to the attribute of the ultrasonic transducer and the influence of the working environment of the ultrasonic transducer, the frequency of the driving signal is equal to the natural frequency, the ultrasonic transducer can generate resonance phenomenon, the ultrasonic transducer is driven according to the driving signal which is the same as the natural frequency, and compared with the scheme of cleaning through a certain frequency or several fixed frequencies in the prior art, the scheme can achieve better cleaning effect.
In an embodiment of the present application, the first determining unit includes a first processing module, a second processing module, and a first determining module, where the first processing module is configured to perform rectification processing on each of the response current signals to obtain a rectified signal; the second processing module is used for filtering each rectified signal to obtain a filtered signal; the first determining module is used for determining the natural frequency of the ultrasonic transducer according to the amplitude of each filtering signal. In this embodiment, because the response current signal is rectified and filtered, the stability of the signal can be ensured to be good, and an interference signal can be filtered, so that the accuracy of the amplitude of the obtained filtered signal can be ensured to be good, and further, the natural frequency of the ultrasonic transducer can be determined more accurately.
Specifically, as shown in fig. 2(a), the peak value of the response current signal in the upper graph of fig. 2(a) is larger than the peak value of the response current signal in the lower graph of fig. 2(a), and then the amplitudes of the two filtered signals are respectively determined.
In another embodiment of the present application, the determining module includes a converting submodule and a first determining submodule, and the converting submodule is configured to convert each of the filtered signals into a voltage signal; the first determining submodule is used for determining the natural frequency of the ultrasonic transducer according to the amplitude of each voltage signal. In this embodiment, the current signal is converted into the voltage signal, the current signal may be converted by a circuit for converting the current signal into the voltage signal, a resistor may be added to the circuit, and when the current flows through the resistor, the current is converted into the voltage signal, and then the amplitude of the voltage signal is determined, so as to determine the natural frequency of the ultrasonic transducer more accurately.
Specifically, as shown in fig. 2(b), the voltage signal in the upper graph of fig. 2(b) is converted from the response current signal in the upper graph of fig. 2(a), and the voltage signal in the lower graph of fig. 2(b) is converted from the response current signal in the lower graph of fig. 2 (a).
In another embodiment of the present application, the first determining sub-module is further configured to determine a frequency of the driving signal corresponding to the voltage signal with the largest amplitude as the natural frequency. In this embodiment, the frequency of the driving signal may be multiple, one voltage signal corresponds to one driving signal of one frequency, the voltage signal with the largest amplitude indicates that resonance occurs, and the frequency of the driving signal corresponding to the voltage signal with the largest amplitude is determined as the natural frequency, which may further ensure that the accuracy of the obtained natural frequency is better.
In another embodiment of the present application, the driving unit includes a second determining module and a third determining module, wherein the second determining module is configured to determine whether an external environment of the ultrasonic transducer changes; the third determining module is used for re-determining the natural frequency of the ultrasonic transducer under the condition that the external environment is changed. In this embodiment, when the external environment changes, the natural frequency of the ultrasonic transducer needs to be determined again, so that the natural frequency of the ultrasonic transducer can be ensured to be accurate under different environments.
In one embodiment, the ultrasonic transducer is installed in the dishwasher, the ultrasonic transducer corresponds to a natural frequency, and when the ultrasonic transducer is placed in a water tank to clean components, the ultrasonic transducer corresponds to another natural frequency, namely the external environment of the ultrasonic transducer is changed, and if the external environment is changed, the natural frequency of the ultrasonic transducer needs to be readjusted.
In a specific embodiment of the present application, the second determining module includes an obtaining submodule and a second determining submodule, where the obtaining submodule is configured to obtain an amplitude of the voltage signal of the driving ultrasonic transducer driven by the natural frequency; the second determining submodule is configured to determine that an external environment of the ultrasonic transducer has changed when an absolute value of a difference between an amplitude of the voltage signal and a first predetermined amplitude is greater than a predetermined value, where the first predetermined amplitude is a maximum value of the amplitude of the voltage signal obtained in a frequency sweep stage, and the frequency sweep stage is a stage in which the ultrasonic transducer is driven by using the driving signals of different frequencies. In this embodiment, when the absolute value of the difference between the amplitude of the voltage signal and the first predetermined amplitude is greater than the predetermined value, it may be accurately determined that the external environment of the ultrasonic transducer has changed, and the natural frequency of the ultrasonic transducer may be further efficiently and accurately adjusted according to the determination result.
Specifically, the frequency sweeping stage is a stage of driving the ultrasonic transducer by a driving signal with a default frequency, for example, starting from 20KHz, sequentially sweeping frequencies from small to large, wherein a step length is 10KHz, sequentially sweeping frequencies from 30KHz, 40KHz, 50KHz and 60KHz, and a maximum value is 60 KHz.
In order to protect the power of the ultrasonic transducer and ensure that the safety of the use of the ultrasonic transducer is good, in another specific embodiment of the present application, the apparatus further includes a second determining unit and a processing unit, where the second determining unit is configured to determine whether the amplitude of the voltage signal is greater than a second predetermined amplitude; the processing unit is used for reducing the duty ratio of the driving signal under the condition that the amplitude of the driving signal is larger than the second preset amplitude, so that the amplitude of the voltage signal is smaller than or equal to the second preset amplitude. For example, the duty cycle is reduced from 50% to 45%.
Specifically, the second predetermined amplitude is the maximum amplitude, that is, the amplitude of the warning, for example, the second predetermined amplitude is set to 15V, and when the amplitude of the collected voltage signal is 20V, the duty ratio of the driving signal is reduced, so that the amplitude of the voltage signal can be reduced.
The control device of the ultrasonic transducer comprises a processor and a memory, wherein the generating unit, the first determining unit, the driving unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one inner core can be arranged, and the cleaning effect of the ultrasonic transducer is improved by adjusting the parameters of the inner core.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
The embodiment of the invention provides a computer-readable storage medium, which comprises a stored program, wherein when the program runs, a device where the computer-readable storage medium is located is controlled to execute a control method of the ultrasonic transducer.
The embodiment of the invention provides a processor, wherein the processor is used for running a program, and the program executes the control method of the ultrasonic transducer when running.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
step S101, generating driving signals with different frequencies, wherein the driving signals are used for driving ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals;
step S102, determining the natural frequency of the ultrasonic transducer according to the amplitudes of a plurality of response current signals;
and step S103, driving the ultrasonic transducer to work by adopting the natural frequency.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
step S101, generating driving signals with different frequencies, wherein the driving signals are used for driving ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals;
step S102, determining the natural frequency of the ultrasonic transducer according to the amplitudes of a plurality of response current signals;
and step S103, driving the ultrasonic transducer to work by adopting the natural frequency.
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions and technical effects of the present application will be described below with reference to specific embodiments.
Examples
The embodiment relates to a specific ultrasonic transducer cleaning method, wherein the cleaning process of an ultrasonic transducer is divided into three stages, namely a frequency sweeping stage, a frequency fixing stage and a frequency modulation stage;
as shown in fig. 4, the method comprises the following steps:
step 1: entering a cleaning mode;
step 2: a frequency sweeping stage: the frequency control range of the ultrasonic transducer is 20 KHz-60 KHz, in the frequency range, frequency sweeping is carried out from the minimum frequency of 20KHz to the maximum frequency of 60KHz, in the frequency sweeping process, each drive signal generates the amplitude of a corresponding voltage signal, for example, the amplitude of the voltage signal corresponding to the frequency of 20KHz is V1(10V), the amplitude of the voltage signal corresponding to 25KHz is V2(30V), the amplitude of the voltage signal corresponding to 30KHz is V3(20V), V2 and V1 are compared, V2 and V3 are compared, when V2 is greater than V1 and V2 is greater than V3, V2 is a peak value, and at the moment, the frequency of 25KHz corresponding to V2 is determined as a natural frequency;
and step 3: a frequency fixing stage: starting to drive the ultrasonic transducer by a driving signal corresponding to the inherent frequency of 25KHz, detecting a voltage signal in real time, comparing the voltage signal with V2 in a frequency sweeping stage, and entering a frequency hopping stage when the external environment changes;
and 4, step 4: and (3) frequency hopping stage: the natural frequency of the ultrasonic transducer is re-determined.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the method for controlling the ultrasonic transducer comprises the steps of firstly generating driving signals with different frequencies, wherein the driving signals are used for driving the ultrasonic transducer, outputting corresponding response current signals by the ultrasonic transducer under the driving of the driving signals, then determining the natural frequency of the ultrasonic transducer according to the amplitudes of a plurality of response current signals, and finally driving the ultrasonic transducer to work by adopting the natural frequency. In the scheme, the generated driving signal has a certain frequency, the ultrasonic transducer can output a corresponding response current signal under the driving of the driving signal, and further can achieve the cleaning effect, the ultrasonic transducer has natural frequency due to the attribute of the ultrasonic transducer and the influence of the working environment of the ultrasonic transducer, the frequency of the driving signal is equal to the natural frequency, the ultrasonic transducer can generate resonance phenomenon, the ultrasonic transducer is driven according to the driving signal which is the same as the natural frequency, and compared with the scheme of cleaning through a certain frequency or several fixed frequencies in the prior art, the scheme can achieve better cleaning effect.
2) The control device of the ultrasonic transducer of the application is characterized in that the generating unit generates driving signals with different frequencies, the driving signals are used for driving the ultrasonic transducer, the ultrasonic transducer outputs corresponding response current signals under the driving of the driving signals, the first determining unit determines the natural frequency of the ultrasonic transducer according to the amplitudes of a plurality of response current signals, and the driving unit drives the ultrasonic transducer to work by adopting the natural frequency. In the scheme, the generated driving signal has a certain frequency, the ultrasonic transducer can output a corresponding response current signal under the driving of the driving signal, and further can achieve the cleaning effect, the ultrasonic transducer has natural frequency due to the attribute of the ultrasonic transducer and the influence of the working environment of the ultrasonic transducer, the frequency of the driving signal is equal to the natural frequency, the ultrasonic transducer can generate resonance phenomenon, the ultrasonic transducer is driven according to the driving signal which is the same as the natural frequency, and compared with the scheme of cleaning through a certain frequency or several fixed frequencies in the prior art, the scheme can achieve better cleaning effect.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method of controlling an ultrasonic transducer, comprising:
generating driving signals with different frequencies, wherein the driving signals are used for driving the ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals;
determining a natural frequency of the ultrasonic transducer according to the amplitudes of the plurality of response current signals;
and driving the ultrasonic transducer to work by adopting the natural frequency.
2. The method of claim 1, wherein determining the natural frequency of the ultrasonic transducer from the magnitudes of the plurality of response current signals comprises:
rectifying each response current signal to obtain a rectified signal;
filtering each rectified signal to obtain a filtered signal;
and determining the natural frequency of the ultrasonic transducer according to the amplitude of each filtering signal.
3. The method of claim 2, wherein determining the natural frequency of the ultrasonic transducer from the magnitude of each of the filtered signals comprises:
converting each of the filtered signals into a voltage signal;
and determining the natural frequency of the ultrasonic transducer according to the amplitude of each voltage signal.
4. The method of claim 3, wherein determining the natural frequency of the ultrasonic transducer from the amplitude of each of the voltage signals comprises:
and determining the frequency of the driving signal corresponding to the voltage signal with the maximum amplitude as the natural frequency.
5. The method of claim 3, wherein in operation of driving the ultrasonic transducer with the natural frequency, the method further comprises:
determining whether an external environment of the ultrasonic transducer has changed;
in the event of a change in the external environment, the natural frequency of the ultrasonic transducer is redetermined.
6. The method of claim 5, wherein determining whether the external environment of the ultrasonic transducer has changed comprises:
acquiring the amplitude of the voltage signal of the driving ultrasonic transducer driven by the natural frequency;
determining that the external environment of the ultrasonic transducer is changed when the absolute value of the difference between the amplitude of the voltage signal and a first predetermined amplitude is greater than a predetermined value, wherein the first predetermined amplitude is the maximum value of the amplitude of the voltage signal obtained in a frequency sweep stage, and the frequency sweep stage is a stage of driving the ultrasonic transducer by using the driving signals with different frequencies.
7. The method of claim 3, further comprising:
determining whether the magnitude of the voltage signal is greater than a second predetermined magnitude;
and in the case of being larger than the second predetermined amplitude, reducing the duty ratio of the driving signal so that the amplitude of the voltage signal is smaller than or equal to the second predetermined amplitude.
8. A control device for an ultrasonic transducer, comprising:
the generating unit is used for generating driving signals with different frequencies, the driving signals are used for driving the ultrasonic transducers, and the ultrasonic transducers output corresponding response current signals under the driving of the driving signals;
a first determination unit for determining the natural frequency of the ultrasonic transducer according to the amplitudes of the plurality of response current signals;
and the driving unit is used for driving the ultrasonic transducer to work by adopting the natural frequency.
9. A computer-readable storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method of any one of claims 1 to 7.
10. An ultrasound device comprising an ultrasound transducer, one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the method of any of claims 1-7.
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Application publication date: 20220322 |