阅读说明：本技术 一种超声强度自动检测控制系统及方法 (Automatic detection control system and method for ultrasonic intensity ) 是由 晏永星 于 2021-07-05 设计创作，主要内容包括：本发明提供了一种超声强度自动检测控制系统及方法,其系统包括：PLC控制器,用于输出预先设置的变化的模拟量直流电压；频率发生器,用于输出相对应的频率信号；功率放大器,用于对频率信号功率放大；超声换能器,用于根据频率驱动产生超声能量；功率放大器上设置有电流传感器,用于采样电流信号并转换成采样电压,PLC控制器读取并比较不同频率下的采样电压,保存采样电压的所有读取值的平均最大值,并在频率发生偏移时,输出与采样电压的平均最大值对应的模拟量直流电压。该系统能够自动进行超声强度检测,并在频率发生偏移时,快速、准确的找到最佳频率谐振点,从而提高超声换能器的稳定性。(The invention provides an ultrasonic intensity automatic detection control system and a method thereof, wherein the system comprises: the PLC is used for outputting preset variable analog quantity direct current voltage; the frequency generator is used for outputting corresponding frequency signals; the power amplifier is used for amplifying the power of the frequency signal; an ultrasonic transducer for generating ultrasonic energy according to a frequency drive; the power amplifier is provided with a current sensor for sampling a current signal and converting the current signal into sampling voltage, the PLC reads and compares the sampling voltage under different frequencies, the average maximum value of all read values of the sampling voltage is stored, and when the frequency deviates, analog quantity direct current voltage corresponding to the average maximum value of the sampling voltage is output. The system can automatically detect the ultrasonic intensity, and quickly and accurately find the optimal frequency resonance point when the frequency deviates, thereby improving the stability of the ultrasonic transducer.)

1. An automatic detection control system for ultrasonic intensity, comprising:

the PLC is used for outputting preset variable analog quantity direct current voltage;

the frequency generator is connected with the PLC and used for outputting a corresponding frequency signal according to the changed analog quantity direct current voltage;

the power amplifier is connected with the frequency generator and is used for amplifying the frequency signal power;

the ultrasonic transducer is connected with the power amplifier and is used for generating ultrasonic energy according to frequency driving;

wherein the power amplifier is provided with a current sensor, the current sensor is used for sampling a current signal and converting the current signal into sampling voltage, the current sensor is connected with the analog quantity input end of the PLC controller through a voltage amplifier,

the PLC reads and compares the sampling voltage corresponding to the ultrasonic energy output by the ultrasonic transducer under different frequencies, stores the average maximum value of all read values of the sampling voltage, and outputs the analog quantity direct current voltage corresponding to the average maximum value of the sampling voltage when the frequency is deviated.

2. The automatic detection control system of ultrasonic intensity according to claim 1, characterized in that: the PLC controller outputs the analog quantity direct current voltage from small to large according to a preset variation value within a preset analog quantity voltage range;

or;

and the PLC outputs the analog quantity direct current voltage from large to small according to a preset change value within a preset analog quantity voltage range.

3. An automatic detection control system of ultrasonic intensity according to claim 2, characterized in that: and the PLC reads the sampling voltage at the current moment, compares the sampling voltage at the current moment with the sampling voltage at the previous moment, and stores the analog quantity direct current voltage corresponding to the sampling voltage with the maximum value.

4. The automatic detection control system of ultrasonic intensity according to claim 2, characterized by further comprising: and the human-computer interaction end is connected with the PLC and is used for displaying the changed analog quantity direct current voltage.

5. The automatic detection control system of ultrasonic intensity according to claim 4, characterized in that: the man-machine interaction end comprises an automatic scanning module and a fine adjustment module;

the automatic scanning module is used for controlling the PLC to output the analog quantity direct current voltage from small to large or from large to small according to a preset change value;

the fine adjustment module is used for controlling the PLC to output the analog quantity direct current voltage increased or decreased by a preset change value.

6. The automatic detection control system of ultrasonic intensity according to any one of claims 1 to 5, characterized by further comprising: the current amplifier is connected between the frequency generator and the frequency power amplifier and is used for amplifying the current of the frequency signal.

7. An automatic detection control method for ultrasonic intensity is characterized by comprising the following steps:

controlling a PLC to output preset variable analog quantity direct current voltage, and enabling a frequency generator to output a corresponding frequency signal according to the variable analog quantity direct current voltage;

collecting the sampling voltage of the frequency signal of the input ultrasonic transducer amplified by the power amplifier, and storing the average maximum value of all read values of the sampling voltage;

and when the frequency is deviated, controlling the PLC to output the analog quantity direct current voltage corresponding to the average maximum value of the sampling voltage.

8. The method for automatically detecting and controlling ultrasonic intensity according to claim 7, wherein the controlling the PLC to output a preset variable analog dc voltage specifically comprises:

controlling the PLC to output the analog quantity direct current voltage within a preset analog quantity voltage range according to a preset change value from small to large;

or;

and controlling the PLC to output the analog quantity direct current voltage from large to small according to a preset change value within a preset analog quantity voltage range.

9. The method according to claim 8, wherein the acquiring a sampled voltage of the frequency signal of the input ultrasound transducer amplified by the power amplifier and storing an average maximum value of all readings of the sampled voltage comprises:

reading the sampling voltage of the frequency signal at the current moment;

comparing the sampled voltage at the present time with the sampled voltage at the previous time;

and storing the analog quantity direct current voltage corresponding to the sampling voltage with the maximum numerical value.

10. The automatic detection control method of ultrasonic intensity according to claim 7, characterized by further comprising the steps of:

and controlling the PLC to output the analog quantity direct current voltage increased or decreased by a preset change value, so that the frequency generator outputs a frequency signal with corresponding frequency.

Technical Field

The invention relates to the technical field of ultrasonic transduction, in particular to an automatic ultrasonic intensity detection control system and method.

Background

The function of the ultrasonic transducer is to convert the input electric power into mechanical power (i.e. ultrasonic waves) and transmit the mechanical power, and a small part of the power is consumed by the ultrasonic transducer. The application of the ultrasonic transducer is very wide, and the ultrasonic transducer is divided into industry, agriculture, transportation, life, medical treatment, military and the like according to the application industry; the method comprises the following steps of ultrasonic processing, ultrasonic cleaning, ultrasonic detection, monitoring, remote measurement, remote control and the like according to realized functions; divided into liquid, gas, organism, etc. according to the working environment; and classified into power ultrasonic, detection ultrasonic, ultrasonic imaging, and the like according to properties.

The ultrasonic transducer now drives a self-excited and a separately excited mode of producing resonance, outputting the best ultrasonic energy. The self-excited circuit is simple, and the output energy can be greatly influenced under the influence of the temperature of the element and the ultrasonic generator; the separately excited circuit is complex, but the frequency can be adjusted, which is beneficial to finding the best energy output, thus being widely applied. When adopting independent excitation formula drive, can appear often that equipment uses a period of time after, the condition of frequency emergence skew needs the engineer to carry out manual adjustment, and efficiency is slower, and the precision is not high, hardly finds optimum frequency resonance point, influences the stability of work. Therefore, there is a need for an automatic ultrasonic intensity detection control system capable of automatically detecting ultrasonic intensity and quickly and accurately finding the resonant point with the optimal frequency when the frequency is shifted.

Disclosure of Invention

The invention aims to provide an automatic ultrasonic intensity detection control system and method, which can automatically detect ultrasonic intensity and quickly and accurately find out an optimal frequency resonance point when frequency shifts, thereby improving the stability of an ultrasonic transducer.

The technical scheme provided by the invention is as follows:

the invention provides an automatic detection control system for ultrasonic intensity, which comprises:

the PLC is used for outputting preset variable analog quantity direct current voltage;

the frequency generator is connected with the PLC and used for outputting a corresponding frequency signal according to the changed analog quantity direct current voltage;

the power amplifier is connected with the frequency generator and is used for amplifying the frequency signal power;

the ultrasonic transducer is connected with the power amplifier and is used for generating ultrasonic energy according to frequency driving;

wherein the power amplifier is provided with a current sensor, the current sensor is used for sampling a current signal and converting the current signal into sampling voltage, the current sensor is connected with the analog quantity input end of the PLC controller through a voltage amplifier,

the PLC reads and compares the sampling voltage corresponding to the ultrasonic energy output by the ultrasonic transducer under different frequencies, stores the average maximum value of all read values of the sampling voltage, and outputs the analog quantity direct current voltage corresponding to the average maximum value of the sampling voltage when the frequency is deviated.

The frequency of the frequency generator is adjusted by voltage, the PLC is controlled to output preset variable analog quantity direct current voltage, the frequency generator can output corresponding frequency signals, the frequency signals are amplified in power and then output to drive the ultrasonic transducer, and corresponding ultrasonic energy can be generated; because the output currents of the ultrasound with different frequencies are different, when the frequency output by the power amplifier is consistent with the natural frequency of the ultrasound transducer and the generated resonant ultrasound is strongest, the current of the power amplifier is also the largest, therefore, the sampling current signal of the power amplifier is collected by the current sensor and the voltage amplifier and converted into sampling voltage, the average maximum value of all read values of the sampling voltage is stored, and the maximum value corresponds to the optimal output frequency point of the power amplifier.

Further, the PLC controller outputs the analog quantity direct current voltage from small to large according to a preset variation value within a preset analog quantity voltage range;

or;

and the PLC outputs the analog quantity direct current voltage from large to small according to a preset change value within a preset analog quantity voltage range.

Specifically, in order to ensure the accuracy of the optimal frequency point, the PLC controller may be controlled to output the analog dc voltage from a small value to a large value or from a large value to a small value within a preset analog voltage range, so as to obtain a frequency signal corresponding to the frequency. The preset analog voltage range and the preset variation value can be adjusted according to the actual parameters of the frequency generator and the ultrasonic transducer, and are not limited herein.

Further, the PLC controller reads the sampling voltage of the frequency signal at the current time, compares the sampling voltage of the frequency signal at the current time with the sampling voltage of the frequency signal at the previous time, and stores the analog dc voltage corresponding to the sampling voltage having the largest value.

Specifically, when the average maximum value of the current sampling voltage is obtained, since the frequency of the frequency signal is continuously changed, the sampling voltage of the frequency signal at the current moment is collected, and then the sampling voltage at the current moment is compared with the sampling voltage at the previous moment to obtain the sampling voltage with a larger numerical value, and the sampling voltage is circulated until all the analog quantity direct-current voltages within the preset analog quantity voltage range are circulated, so that the average maximum value of the sampling voltage can be obtained, and the analog quantity direct-current voltage corresponding to the sampling voltage with the largest numerical value is stored.

Further, still include: and the human-computer interaction end is connected with the PLC and is used for displaying the changed analog quantity direct current voltage.

Furthermore, the man-machine interaction end comprises an automatic scanning module and a fine adjustment module;

the automatic scanning module is used for controlling the PLC to output the analog quantity direct current voltage from small to large or from large to small according to a preset change value;

the fine adjustment module is used for controlling the PLC to output the analog quantity direct current voltage increased or decreased by a preset change value.

Specifically, when the PLC controller is controlled to output a varying analog dc voltage, the PLC controller may be controlled to output an analog dc voltage from a preset variation value to a large value or from a large value to a small value in an automatic scanning manner, thereby implementing automatic detection of the ultrasonic intensity; the PLC controller can be controlled to increase or decrease the analog quantity direct current voltage by a preset change value in a fine adjustment mode, so that the required analog quantity direct current voltage can be selected conveniently.

Further, still include: the current amplifier is connected between the frequency generator and the frequency power amplifier and is used for amplifying the current of the frequency signal.

In addition, the invention also provides an automatic detection control method of ultrasonic intensity, which comprises the following steps:

controlling a PLC to output preset variable analog quantity direct current voltage, and enabling a frequency generator to output a corresponding frequency signal according to the variable analog quantity direct current voltage;

collecting the sampling voltage of the frequency signal of the input ultrasonic transducer amplified by the power amplifier, and storing the average maximum value of all read values of the sampling voltage;

and when the frequency is deviated, controlling the PLC to output the analog quantity direct current voltage corresponding to the average maximum value of the sampling voltage.

Further, the control of the PLC controller to output a preset variable analog dc voltage specifically includes:

controlling the PLC to output the analog quantity direct current voltage within a preset analog quantity voltage range according to a preset change value from small to large;

or;

and controlling the PLC to output the analog quantity direct current voltage from large to small according to a preset change value within a preset analog quantity voltage range.

Further, the acquiring a sampling voltage of the frequency signal of the input ultrasonic transducer amplified by the power amplifier and storing an average maximum value of all read values of the sampling voltage specifically includes:

reading the sampling voltage of the frequency signal at the current moment;

comparing the sampled voltage at the present time with the sampled voltage at the previous time;

and storing the analog quantity direct current voltage corresponding to the sampling voltage with the maximum numerical value.

Further, the method also comprises the following steps:

and controlling the PLC to output the analog quantity direct current voltage increased or decreased by a preset change value, so that the frequency generator outputs a frequency signal with corresponding frequency.

According to the automatic detection control system and method for ultrasonic intensity, the PLC is controlled to output the preset variable analog quantity direct current voltage, the frequency generator can output corresponding frequency signals, the frequency signals are amplified in power and then output to drive the ultrasonic transducer, and corresponding ultrasonic energy can be generated; sampling current signals of the power amplifier are collected through the current sensor and the voltage amplifier and converted into sampling voltage, the average maximum value of all reading values of the sampling voltage is stored, the maximum value corresponds to the optimal output frequency point of the power amplifier, when frequency shifts, the PLC is directly controlled to output analog quantity direct current voltage corresponding to the average maximum sampling voltage, the optimal output frequency can be directly obtained, therefore, the optimal frequency resonance point can be quickly and accurately found, and the stability of the ultrasonic transducer is favorably improved.

Drawings

The foregoing features, technical features, advantages and embodiments of the present invention will be further explained in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic diagram of a system architecture of an embodiment of the present invention;

FIG. 2 is a schematic overall flow diagram of an embodiment of the present invention;

FIG. 3 is an initial diagram of a human-computer interaction interface according to an embodiment of the invention;

FIG. 4 is a schematic diagram of the initiation of the human-computer interaction interface according to the embodiment of the present invention.

Reference numbers in the figures: 1-a human-computer interaction end; 2-a PLC controller; 3-a frequency generator; 4-a current amplifier; 5-a power amplifier; 6-a current sensor; 7-an ultrasonic transducer; 8-voltage amplifier.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

Example 1

One embodiment of the present invention, as shown in fig. 1, provides an automatic detection control system for ultrasonic intensity, which includes a PLC controller, a frequency generator, a power amplifier and an ultrasonic transducer.

The PLC controller is configured to output a preset variable analog dc voltage, and the variable analog dc voltage is adjusted according to actual parameters of the frequency generator and the ultrasonic transducer, which is not limited herein.

The frequency generator is connected with the PLC and used for outputting corresponding frequency signals according to the changed analog quantity direct current voltage; the power amplifier is connected with the frequency generator and used for amplifying the power of the frequency signal; the ultrasonic transducer is connected with the power amplifier and is used for generating ultrasonic energy according to frequency driving.

Preferably, the system further comprises a current amplifier connected between the frequency generator and the frequency power amplifier, so that the current of the frequency signal can be amplified before the frequency signal is power-amplified.

The power amplifier is provided with a current sensor for sampling a current signal and converting the current signal into sampling voltage, the current sensor is connected with an analog quantity input end of the PLC through the voltage amplifier, the PLC reads and compares the sampling voltage corresponding to ultrasonic energy output by the ultrasonic transducer under different frequencies, the average maximum value of all read values of the sampling voltage is stored, and when the frequency is deviated, analog quantity direct current voltage corresponding to the maximum value of the sampling voltage is output.

The frequency of the frequency generator is adjusted by voltage, the PLC is controlled to output preset variable analog quantity direct current voltage, the frequency generator can output corresponding frequency signals, the frequency signals are amplified in power and then output to drive the ultrasonic transducer, and corresponding ultrasonic energy can be generated.

Because the output currents of the ultrasound with different frequencies are different, when the frequency output by the power amplifier is consistent with the natural frequency of the ultrasound transducer and the generated resonant ultrasound is strongest, the current of the power amplifier is also the largest, therefore, the sampling current signal of the power amplifier is collected by the current sensor and the voltage amplifier and converted into sampling voltage, the average maximum value of all read values of the sampling voltage is stored, the maximum value corresponds to the optimal output frequency point of the power amplifier, when the frequency is deviated, the PLC is directly controlled to output analog quantity direct current voltage corresponding to the average maximum sampling voltage, the optimal output frequency can be directly obtained, thereby realizing fast and accurate finding of the optimal frequency resonance point, being beneficial to improving the stability of the ultrasound transducer, being applicable to various ultrasound products, such as glass optical series beauty equipment, when the ultrasonic intensity automatic detection control system is used on the beauty equipment, the equipment can output stable and reliable ultrasonic energy, and the service performance of the equipment is further improved.

Example 2

In an embodiment of the present invention, on the basis of embodiment 1, the PLC controller outputs an analog dc voltage from a small value to a large value within a preset analog voltage range; or the PLC controller outputs the analog quantity direct current voltage from large to small according to a preset change value within a preset analog quantity voltage range.

Specifically, in order to ensure the accuracy of the optimal frequency point, the PLC controller may be controlled to output the analog dc voltage from a small value to a large value or from a large value to a small value within a preset analog voltage range, so as to obtain a corresponding frequency signal. The preset analog voltage range and the preset variation value can be adjusted according to the actual parameters of the frequency generator and the ultrasonic transducer, and are not limited herein. In the embodiment, the preset analog voltage range is selected to be 0-6V, the change is performed once every 0.1V, the change scanning of 0V-6V is completed in 60 seconds, and in other embodiments, the adjustment can be performed according to actual requirements.

Preferably, the PLC controller reads the sampling voltage of the frequency signal at the current time, compares the sampling voltage at the current time with the sampling voltage at the previous time, and stores the analog dc voltage corresponding to the sampling voltage having the largest value.

Specifically, when the average maximum value of the current sampling voltage is obtained, since the frequency of the frequency signal is continuously changed, the sampling voltage of the frequency signal at the current moment is collected, and then the sampling voltage at the current moment is compared with the sampling voltage at the previous moment to obtain the sampling voltage with a larger numerical value, and the sampling voltage is circulated until all the analog quantity direct-current voltages within the preset analog quantity voltage range are circulated, so that the average maximum value of the sampling voltage can be obtained, and the analog quantity direct-current voltage corresponding to the sampling voltage with the largest numerical value is stored.

Example 3

In an embodiment of the present invention, on the basis of embodiment 1 and on the basis of embodiment 2, the automatic ultrasonic intensity detection control system further includes a human-computer interaction terminal, and the human-computer interaction terminal is connected to the PLC controller and is configured to display a variable analog dc voltage.

The man-machine interaction end comprises an automatic scanning module and a fine adjustment module; the automatic scanning module is used for controlling the PLC to output analog direct-current voltage from small to large or from large to small according to a preset change value; the fine adjustment module is used for controlling the output of the PLC to increase or decrease the analog quantity direct current voltage according to a preset change value.

Specifically, when the PLC controller is controlled to output a varying analog dc voltage, the PLC controller may be controlled to output an analog dc voltage from a preset variation value to a large value or from a large value to a small value in an automatic scanning manner, thereby implementing automatic detection of the ultrasonic intensity; the PLC is controlled to output the analog quantity direct current voltage increased or decreased by the preset change value in a fine adjustment mode, so that the required analog quantity direct current voltage can be selected conveniently.

For example, as shown in fig. 3 and 4, in the present embodiment, the programmable controller DV (0V-6V) changes every 0.1V by pressing the AUTO key of the human-computer interface, and the change scan of 0V-6V is completed in 60 seconds, and the middle 20 yellow dots are divided into 20 grids of 0-6V and 0.3V/1 grid. Signals generated by the frequency generator are amplified by the ultrasonic current amplifier from about 180-220 khz, and then the signals are amplified by the power amplifier to drive the ultrasonic energy-cycling device to work, because of the change of frequency and current, the signals are read into the programmable controller after being amplified by sampling voltage, and numerical values are displayed in the middle, such as: comparing DV0 with DV0.1, storing the large value, comparing with DV0.2 until DV6.0, and storing the final maximum value; the method comprises the steps that a READY key is pressed to start up, software reads the stored maximum value, if the current value of DV3.5 is the maximum, the READY key is pressed, a programmable controller DV is 3.5V, the middle 20 yellow points display the front 11 yellow points, a manual fine tuning key is arranged on the left and right of an interface in a left-to-right (plus) mode, if the programmable controller DV is 3.5V, the programmable controller is once pressed towards the left, the programmable controller is reduced by 0.1V, the DV is 3.4V, and the programmable controller is once pressed towards the right, the programmable controller is increased by 0.1V and the DV is 3.6V, so that the output analog quantity direct current voltage at the current moment can be visually displayed, and the change of the analog quantity direct current voltage can also be visually displayed. When the frequency is deviated and the optimal output frequency needs to be selected, the current output analog quantity direct current voltage can be manually adjusted through the fine adjustment module, so that the needed analog quantity direct current voltage can be selected. In this embodiment, the display of 20 yellow dots is a display mode of dividing the analog dc voltage of 0-6V into 20 dots by dot, and may also be directly displaying 0-6V or other aesthetic display modes, which is not limited herein.

Example 4

An embodiment of the present invention, as shown in fig. 2, further provides an automatic detection control method of ultrasonic intensity, including the steps of:

and S1, controlling the PLC to output preset variable analog quantity direct current voltage, and enabling the frequency generator to output corresponding frequency signals according to the variable analog quantity direct current voltage.

And S2, collecting the sampling voltage of the frequency signal of the input ultrasonic transducer amplified by the power amplifier, and saving the average maximum value of all read values of the sampling voltage.

And S3, controlling the PLC to output an analog direct current voltage corresponding to the maximum value of the sampling voltage when the frequency is deviated.

Specifically, the frequency of the frequency generator is adjusted by voltage, the PLC is controlled to output a preset variable analog quantity direct current voltage, the frequency generator can output a corresponding frequency signal, the power of the frequency signal is amplified and then output to drive the ultrasonic transducer, and corresponding ultrasonic energy can be generated.

Since the output currents of the ultrasound with different frequencies are different, the current of the power amplifier is also the largest when the frequency of the output of the power amplifier is consistent with the natural frequency of the ultrasound transducer and the generated resonant ultrasound is the strongest. Therefore, the sampling current signal of the power amplifier is collected through the current sensor and the voltage amplifier and converted into the sampling voltage, the average maximum value of all the reading values of the sampling voltage is stored, the maximum value corresponds to the optimal output frequency point of the power amplifier, when the frequency deviates, the PLC is directly controlled to output the analog quantity direct current voltage corresponding to the average maximum sampling voltage, the optimal output frequency can be directly obtained, and therefore the optimal frequency resonance point can be quickly and accurately found, the stability of the ultrasonic transducer is improved, the ultrasonic intensity automatic detection control system is suitable for various ultrasonic products, such as glass light series beauty equipment, the ultrasonic intensity automatic detection control system is used for the beauty equipment, the equipment can output stable and reliable ultrasonic energy, and the equipment use performance is improved.

Example 5

In an embodiment of the present invention, on the basis of embodiment 4, the controlling the PLC controller to output a variable analog dc voltage specifically includes:

controlling a PLC controller to output analog direct-current voltage from small to large according to a preset variation value within a preset analog voltage range; or controlling the PLC to output the analog quantity direct current voltage from large to small according to a preset change value within a preset analog quantity voltage range.

Specifically, in order to ensure the accuracy of the optimal frequency point, the PLC controller may be controlled to output the analog dc voltage from a preset variation value to a large value or from a large value to a small value within a preset analog voltage range, so as to obtain a frequency signal with a regularly varying frequency. The preset analog voltage range and the preset variation value can be adjusted according to the actual parameters of the frequency generator and the ultrasonic transducer, and are not limited herein. In the embodiment, the preset analog voltage range is selected to be 0-6V, the change is performed once every 0.1V, the change scanning of 0V-6V is completed in 60 seconds, and in other embodiments, the adjustment can be performed according to actual requirements.

Preferably, the acquiring a sampling voltage of the frequency signal of the input ultrasonic transducer amplified by the power amplifier, and storing an average maximum value of all read values of the sampling voltage specifically includes:

and S21, acquiring the sampling voltage at the current moment.

And S22, comparing the sampling voltage at the current moment with the sampling voltage at the previous moment.

And S23, storing the analog quantity direct current voltage corresponding to the sampling voltage with the maximum numerical value.

Specifically, when the maximum value of the current sampling voltage is obtained, because the frequency of the frequency signal is continuously changed, the sampling voltage of the frequency signal at the current moment is collected, and then the sampling voltage at the current moment is compared with the sampling voltage at the previous moment to obtain the sampling voltage with the maximum value, so that the sampling voltage is circulated until all the analog quantity direct current voltages in the preset analog quantity voltage range are circulated, the average maximum value of the sampling voltage can be obtained, and the analog quantity direct current voltage corresponding to the sampling voltage with the larger value is stored.

Preferably, the method for automatically detecting and controlling ultrasonic intensity further comprises the following steps:

and controlling the output of the PLC to increase or decrease the analog direct-current voltage by a preset change value so that the frequency generator outputs a frequency signal with corresponding frequency.

Specifically, when the PLC controller is controlled to output a varying analog dc voltage, the PLC controller may be controlled to output an analog dc voltage from a preset variation value to a large value or from a large value to a small value in an automatic scanning manner, thereby implementing automatic detection of the ultrasonic intensity; the PLC is controlled to output the analog quantity direct current voltage increased or decreased by the preset change value in a fine adjustment mode, so that the required analog quantity direct current voltage can be selected conveniently.

For example, as shown in fig. 3 and 4, in the present embodiment, the programmable controller DV (0V-6V) changes every 0.1V by pressing the AUTO key of the human-computer interface, and the change scan of 0V-6V is completed in 60 seconds, and the middle 20 yellow dots are divided into 20 grids of 0-6V and 0.3V/1 grid. Signals generated by the frequency generator are amplified by the ultrasonic current amplifier from about 180-220 khz, and then the signals are amplified by the power amplifier to drive the ultrasonic energy-cycling device to work, because of the change of frequency and current, the signals are read into the programmable controller after being amplified by sampling voltage, and numerical values are displayed in the middle, such as: comparing DV0 with DV0.1, storing the large value, comparing with DV0.2 until DV6.0, and storing the final maximum value; the method comprises the steps that a READY key is pressed to start up, software reads the stored maximum value, if the current value of DV3.5 is the maximum, the READY key is pressed, a programmable controller DV is 3.5V, the middle 20 yellow points display the front 11 yellow points, a manual fine tuning key is arranged on the left and right of an interface in a left-to-right (plus) mode, if the programmable controller DV is 3.5V, the programmable controller is once pressed towards the left, the programmable controller is reduced by 0.1V, the DV is 3.4V, and the programmable controller is once pressed towards the right, the programmable controller is increased by 0.1V and the DV is 3.6V, so that the output analog quantity direct current voltage at the current moment can be visually displayed, and the change of the analog quantity direct current voltage can also be visually displayed. When the frequency is deviated and the optimal output frequency needs to be selected, the current output analog quantity direct current voltage can be manually adjusted through the fine adjustment module, so that the needed analog quantity direct current voltage can be selected. In this embodiment, the display of 20 yellow dots is a display mode of dividing the analog dc voltage of 0-6V into 20 dots by dot, and may also be directly displaying 0-6V or other aesthetic display modes, which is not limited herein.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.