A full-automatic inductance matching system and method for an ultrasonic cleaning generator

Abstract

The application relates to the technical field of ultrasonic cleaning, in particular to a full-automatic inductance matching system and method for an ultrasonic cleaning generator, which comprises a pulse generation circuit, a main control circuit, an adjustable inductance component, a duty cycle adjustment circuit and an inductance matching adjustment circuit; the main control circuit is used for collecting a voltage signal of the pulse generation circuit; the duty cycle adjustment circuit is used for receiving and rectifying a current signal of commercial power and receiving a voltage signal sent by the main control circuit, dividing the voltage signal by the current signal to obtain an acoustic resistance signal, and sending the acoustic resistance signal back to the main control circuit; and the inductance matching adjustment circuit is used for receiving a control signal sent by the main control circuit and controlling the inductance of the inductance component to adjust the size. The application aims to provide a full-automatic inductance matching system and method for an ultrasonic cleaning generator, which can automatically adjust an optimal acoustic resistance value point while saving cost, and the resonance matching system is optimal.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic cleaning technology, and specifically to a fully automatic inductance matching system and method for an ultrasonic cleaning generator. Background Technology

[0002] Currently, ultrasound can efficiently clean the surface of objects through cavitation, leading to the widespread application of ultrasonic cleaning technology in the industrial field. Cavitation refers to the process by which tiny bubbles (cavitation nuclei) existing in a liquid vibrate, grow, and continuously accumulate sound energy under the influence of an ultrasonic field. When the energy reaches a certain threshold, the cavitation bubbles collapse and close abruptly. The lifespan of a cavitation bubble is approximately 0.1 μs, and it can release enormous energy upon rapid collapse, generating a powerful microjet with a velocity of approximately 110 m / s. In recent years, ultrasonic cleaning technology has gradually entered the consumer market, appearing in products such as ultrasonic beauty devices, ultrasonic vegetable washers, and ultrasonic dishwashers.

[0003] Currently, the duty cycle determines the intensity of the ultrasound, while the value of the inductor used for resonant matching determines the stability of the ultrasound intensity. If the inductor value is not at its optimal point, the acoustic impedance cannot be maintained at its optimal point, and the ultrasonic circuit is prone to overheating and poor heat dissipation. Adding a transistor for voltage regulation increases costs. Some solutions allow for manual adjustment of the inductor value, but this adjustment is relatively slow and cannot maintain the optimal point at all times, causing problems in use. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a fully automatic inductance matching system and method for an ultrasonic cleaning generator, which can automatically adjust the optimal acoustic impedance value point and achieve the best resonance matching system while saving costs.

[0005] This invention is achieved through the following technical solution:

[0006] An automatic inductance matching system for an ultrasonic cleaning generator includes a pulse generation circuit, a main control circuit, an adjustable inductor assembly, a duty cycle adjustment circuit, and an inductance matching adjustment circuit. The main control circuit is used to acquire the voltage signal from the pulse generation circuit. The duty cycle adjustment circuit is used to receive and rectify the current signal from the mains power supply and receive the voltage signal sent by the main control circuit, divide the voltage signal by the current signal to obtain the acoustic impedance signal, and send the acoustic impedance signal back to the main control circuit. The inductance matching adjustment circuit is used to receive the control signal sent by the main control circuit and control the inductance of the inductor assembly to adjust its value.

[0007] The duty cycle adjustment circuit includes an operational amplifier rectifier module, an impedance transformation follower module, and an acoustic impedance calculation module, and the main control circuit includes a microcontroller.

[0008] The operational amplifier rectifier circuit includes operational amplifier IC1 and operational amplifier IC2, the impedance transformation follower module includes operational amplifier IC3 and operational amplifier IC4, and the acoustic impedance calculation module includes operational amplifier IC5;

[0009] The non-inverting input terminal of operational amplifier IC1 and the inverting input terminal of operational amplifier IC2 are respectively connected to the mains power, and the output terminals of operational amplifier IC1 and operational amplifier IC2 are both connected to the non-inverting input terminal of operational amplifier IC3.

[0010] The inverting input and output of operational amplifier IC3 are both electrically connected to the inverting input of operational amplifier IC5. The non-inverting input of operational amplifier IC4 is electrically connected to the POWER-CTR terminal of the microcontroller. The inverting input and output of operational amplifier IC4 are electrically connected to the POWER-PRO terminal of the microcontroller and the non-inverting input of operational amplifier IC5, respectively. The output of operational amplifier IC5 is electrically connected to the VPOWER terminal of the microcontroller.

[0011] The duty cycle adjustment circuit further includes an acoustic impedance operational amplifier module, which includes operational amplifier IC6. The non-inverting input terminal of operational amplifier IC6 is electrically connected to the output terminal of operational amplifier IC5 and the VPOWER terminal of the microcontroller. The output terminal of operational amplifier IC6 is electrically connected to the VPOWER1 terminal of the microcontroller.

[0012] The duty cycle adjustment circuit further includes a follow-up processing display module, which in turn includes an operational amplifier IC7. The non-inverting input of the operational amplifier IC7 is electrically connected to the output of the operational amplifier IC6 and the VPOWER terminal of the microcontroller. The output of the operational amplifier IC7 is electrically connected to the microcontroller-VPOWER terminal of the microcontroller.

[0013] The inductance matching and adjustment circuit includes a driver chip U2, and the adjustable inductor component includes a drive motor and an adjustable inductor. The AIN terminal of the driver chip U2 is electrically connected to the AIN terminal of the microcontroller, the BIN terminal of the driver chip U2 is electrically connected to the BIN terminal of the microcontroller, the positive terminal of the motor is electrically connected to the AOUT terminal of the chip U2, and the negative terminal of the motor is electrically connected to the BOUNT terminal of the chip U2.

[0014] The adjustable inductor includes an inductor body, a first magnetic core, a second magnetic core, and a linkage component. The first magnetic core and the second magnetic core are respectively inserted into the two ends of the inductor body. The drive motor drives the first magnetic core and the second magnetic core to move closer or further away from each other simultaneously through the linkage component.

[0015] The linkage component includes a first slide, a second slide, a round rod, a first nut, and a second nut. The round rod is driven to the output end of the drive motor. The round rod is provided with a first thread and a second thread in opposite directions at intervals. The first nut is screwed to the first thread, and the second nut is screwed to the second thread.

[0016] The first nut and the first magnetic core are both disposed on the first slide, and the second nut and the second magnetic core are both disposed on the second slide.

[0017] This invention also discloses a fully automatic inductance matching method for an ultrasonic cleaning generator, comprising the following steps:

[0018] A. The ultrasound system is connected to mains power, and the pulse generation circuit generates pulse signals;

[0019] B. The duty cycle adjustment circuit extracts and rectifies the current signal from the mains power supply, and simultaneously receives the voltage signal sent by the main control circuit;

[0020] C. The voltage and current signals are followed and processed, and the voltage and current signals are divided to obtain the acoustic impedance value, which is then read.

[0021] D. Adjust the inductance of the resonant circuit with the ultrasonic system according to the required acoustic impedance, and repeat steps A and C in sequence until the acoustic impedance in step C is consistent with the required acoustic impedance.

[0022] In step C, the acoustic impedance signal is processed by an operational amplifier and a follower before being sent to the microcontroller for numerical display.

[0023] The beneficial effects of this invention are:

[0024] This invention discloses a fully automatic inductance matching system and method for an ultrasonic cleaning generator. It incorporates an adjustable inductor component, a duty cycle adjustment circuit, and an inductance matching adjustment circuit. The main control circuit collects voltage signals related to the pulse generation circuit, while the duty cycle adjustment circuit collects current signals from the mains power supply and voltage signals from the pulse generation circuit. These signals are processed to obtain an acoustic impedance signal, which is then sent back to the main control circuit. The user can read the current acoustic impedance value from the main control circuit at any time to obtain the current operating status of the ultrasonic system. By adjusting the inductance value of the adjustable inductor component, the user can perform real-time acoustic impedance adjustment based on the acoustic impedance signal read from the main control circuit, ultimately adjusting to the required acoustic impedance value to achieve optimal operating conditions. Compared to existing technologies, this invention does not use transistors for adjustment, resulting in lower costs and automatic adjustment to the optimal acoustic impedance value, maintaining the ultrasonic matching system in its best operating state. Attached Figure Description

[0025] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0026] Figure 1 This is a partial circuit schematic diagram of the present invention.

[0027] Figure 2 This is another part of the circuit schematic diagram of the present invention.

[0028] Figure 3 This is another part of the circuit schematic diagram of the present invention. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] Currently, ultrasound can efficiently clean the surface of objects through cavitation, leading to the widespread application of ultrasonic cleaning technology in the industrial field. Cavitation refers to the process by which tiny bubbles (cavitation nuclei) existing in a liquid vibrate, grow, and continuously accumulate sound energy under the influence of an ultrasonic field. When the energy reaches a certain threshold, the cavitation bubbles collapse and close abruptly. The lifespan of a cavitation bubble is approximately 0.1 μs, and it can release enormous energy upon rapid collapse, generating a powerful microjet with a velocity of approximately 110 m / s. In recent years, ultrasonic cleaning technology has gradually entered the consumer market, appearing in products such as ultrasonic beauty devices, ultrasonic vegetable washers, and ultrasonic dishwashers.

[0033] Currently, the duty cycle determines the intensity of the ultrasound, while the value of the inductor used for resonant matching determines the stability of the ultrasound intensity. If the inductor value is not at its optimal point, the acoustic impedance cannot be maintained at its optimal point, and the ultrasonic circuit is prone to overheating and poor heat dissipation. Adding a transistor for voltage regulation increases costs. Some solutions allow for manual adjustment of the inductor value, but this adjustment is relatively slow and cannot maintain the optimal point at all times, causing problems in use.

[0034] To address the aforementioned problems, this embodiment discloses a fully automatic inductance matching system for an ultrasonic cleaning generator, the circuit principle of which is as follows: Figures 1 to 3 As shown, the system includes a pulse generation circuit, a main control circuit, an adjustable inductor assembly, a duty cycle adjustment circuit, and an inductance matching adjustment circuit. The main control circuit is used to acquire the voltage signal from the pulse generation circuit; the duty cycle adjustment circuit is used to receive and rectify the current signal from the mains power supply and receive the voltage signal sent by the main control circuit, divide the voltage signal by the current signal to obtain the acoustic impedance signal, and send the acoustic impedance signal back to the main control circuit; the inductance matching adjustment circuit is used to receive the control signal sent by the main control circuit and control the inductance of the inductor assembly to adjust its size.

[0035] This invention also discloses a fully automatic inductance matching method for an ultrasonic cleaning generator, which is used in conjunction with the system of this embodiment. The method includes the following steps:

[0036] A. The ultrasound system is connected to mains power, and the pulse generation circuit generates pulse signals;

[0037] B. The duty cycle adjustment circuit extracts and rectifies the current signal from the mains power supply, and simultaneously receives the voltage signal sent by the main control circuit;

[0038] C. The voltage and current signals are followed and processed, and the voltage and current signals are divided to obtain the acoustic impedance value, which is then read.

[0039] D. Adjust the inductance of the resonant circuit with the ultrasonic system according to the required acoustic impedance, and repeat steps A and C in sequence until the acoustic impedance in step C is consistent with the required acoustic impedance.

[0040] Furthermore, in step C, the acoustic impedance signal is processed by an operational amplifier and a follower and then sent to a microcontroller for numerical display. The microcontroller model in this embodiment is STC8H3K48S2.

[0041] Specifically, this invention discloses a fully automatic inductance matching system and method for an ultrasonic cleaning generator. It incorporates an adjustable inductor component, a duty cycle adjustment circuit, and an inductance matching adjustment circuit. The main control circuit collects voltage signals related to the pulse generation circuit, while the duty cycle adjustment circuit collects current signals from the mains power supply and voltage signals from the pulse generation circuit. These signals are processed to obtain an acoustic impedance signal, which is then sent back to the main control circuit. The user can read the current acoustic impedance value from the main control circuit at any time to obtain the current operating status of the ultrasonic system. By adjusting the inductance value of the adjustable inductor component, the user can perform real-time acoustic impedance adjustment based on the acoustic impedance signal read from the main control circuit, ultimately adjusting to the required acoustic impedance value to achieve optimal operating conditions. Compared to existing technologies, this invention does not use transistors for adjustment, resulting in lower costs and automatic adjustment to the optimal acoustic impedance value, maintaining the optimal operating state of the ultrasonic matching system.

[0042] Furthermore, the duty cycle adjustment circuit includes an operational amplifier rectifier module, an impedance transformation follower module, and an acoustic impedance calculation module; the main control circuit includes a microcontroller; the operational amplifier rectifier circuit includes operational amplifier IC1 and operational amplifier IC2; the impedance transformation follower module includes operational amplifier IC3 and operational amplifier IC4; the acoustic impedance calculation module includes operational amplifier IC5; the non-inverting input terminal of operational amplifier IC1 and the inverting input terminal of operational amplifier IC2 are respectively connected to the mains power; the output terminals of operational amplifier IC1 and operational amplifier IC2 are both connected to the non-inverting input terminal of operational amplifier IC3; the inverting input terminal and output terminal of operational amplifier IC3 are both connected to the inverting input terminal of operational amplifier IC5; the non-inverting input terminal of operational amplifier IC4 is connected to the POWER-CTR terminal of the microcontroller; the inverting input terminal and output terminal of operational amplifier IC4 are respectively connected to the POWER-PRO terminal of the microcontroller and the non-inverting input terminal of operational amplifier IC5; the output terminal of operational amplifier IC5 is connected to the VPOWER terminal of the microcontroller.

[0043] Furthermore, the duty cycle adjustment circuit also includes an acoustic impedance operational amplifier module, which includes operational amplifier IC6. The non-inverting input terminal of operational amplifier IC6 is electrically connected to the output terminal of operational amplifier IC5 and the VPOWER terminal of the microcontroller. The output terminal of operational amplifier IC6 is electrically connected to the VPOWER1 terminal of the microcontroller.

[0044] Furthermore, the duty cycle adjustment circuit also includes a follow-up processing display module, which further includes an operational amplifier IC7. The non-inverting input terminal of the operational amplifier IC7 is electrically connected to the output terminal of the operational amplifier IC6 and the VPOWER terminal of the microcontroller. The output terminal of the operational amplifier IC7 is electrically connected to the microcontroller-VPOWER terminal of the microcontroller.

[0045] The duty cycle adjustment circuit in this embodiment achieves real-time adjustment of the acoustic impedance value by performing operational amplifier rectification, conversion and follower operation, acoustic impedance calculation, acoustic impedance operational amplifier operation, and follower processing on the corresponding voltage and current, and sending the results to the microcontroller's external display screen for real-time display.

[0046] Furthermore, the inductance matching adjustment circuit includes a driver chip U2, and the adjustable inductor assembly includes a drive motor and an adjustable inductor. The AIN terminal of the driver chip U2 is electrically connected to the AIN terminal of the microcontroller, the BIN terminal of the driver chip U2 is electrically connected to the BIN terminal of the microcontroller, the positive terminal of the motor is electrically connected to the AOUT terminal of the chip U2, and the negative terminal of the motor is electrically connected to the BOUNT terminal of the chip U2. The adjustable inductor includes an inductor body, a first magnetic core, a second magnetic core, and a linkage assembly. The first magnetic core and the second magnetic core are respectively inserted into the two ends of the inductor body, and the drive motor drives the first magnetic core and the second magnetic core to move closer or further away simultaneously through the linkage assembly.

[0047] Furthermore, the linkage assembly includes a first slide, a second slide, a round rod, a first nut, and a second nut. The round rod is driven and connected to the output end of the drive motor. The round rod is provided with a first thread and a second thread in opposite directions at intervals. The first nut is screwed to the first thread, and the second nut is screwed to the second thread. The first nut and the first magnetic core are both disposed on the first slide, and the second nut and the second magnetic core are both disposed on the second slide.

[0048] In this embodiment, a control signal is sent from the microcontroller to the driver chip U2, which, along with the corresponding peripheral circuitry, drives the motor to rotate in both directions. Simultaneously, the motor drives the first and second slides to move closer and further apart, changing the gap between the two magnetic cores and the coil in the inductor body, thereby altering the inductance value. Furthermore, since the acoustic impedance value in this embodiment is fed back in real-time by the circuit, there is no need to worry about the movement distance of the first and second slides; only the acoustic impedance value displayed on the screen needs to be monitored.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A fully automatic inductance matching system for an ultrasonic cleaning generator, comprising a pulse generation circuit and a main control circuit, wherein the main control circuit is used to acquire the voltage signal of the pulse generation circuit, characterized in that, It also includes an adjustable inductor assembly, a duty cycle adjustment circuit, and an inductance matching adjustment circuit; The duty cycle adjustment circuit is used to receive and rectify the current signal of the mains power and the voltage signal sent by the main control circuit. It divides the voltage signal and the current signal to obtain the acoustic impedance signal and sends the acoustic impedance signal back to the main control circuit. The inductance matching and adjustment circuit is used to receive the control signal sent by the main control circuit and control the inductance of the adjustable inductor component to adjust the size. The main control circuit compares the received acoustic impedance signal with the acoustic impedance value to be adjusted, and sends the control signal to the inductance matching adjustment circuit according to the comparison result, so as to adjust the inductance value of the adjustable inductor component that forms a resonant circuit with the ultrasonic system until the acoustic impedance signal is consistent with the acoustic impedance value to be adjusted.

2. The fully automatic inductance matching system for an ultrasonic cleaning generator according to claim 1, characterized in that: The duty cycle adjustment circuit includes an operational amplifier rectifier module, an impedance transformation follower module, and an acoustic impedance calculation module; the main control circuit includes a microcontroller. The operational amplifier rectifier circuit includes operational amplifier IC1 and operational amplifier IC2, the impedance transformation follower module includes operational amplifier IC3 and operational amplifier IC4, and the acoustic impedance calculation module includes operational amplifier IC5; The non-inverting input terminal of operational amplifier IC1 and the inverting input terminal of operational amplifier IC2 are respectively connected to the mains power, and the output terminals of operational amplifier IC1 and operational amplifier IC2 are both connected to the non-inverting input terminal of operational amplifier IC3. The inverting input and output of operational amplifier IC3 are both electrically connected to the inverting input of operational amplifier IC5. The non-inverting input of operational amplifier IC4 is electrically connected to the POWER-CTR terminal of the microcontroller. The inverting input and output of operational amplifier IC4 are electrically connected to the POWER-PRO terminal of the microcontroller and the non-inverting input of operational amplifier IC5, respectively. The output of operational amplifier IC5 is electrically connected to the VPOWER terminal of the microcontroller.

3. The fully automatic inductance matching system for an ultrasonic cleaning generator according to claim 2, characterized in that: The duty cycle adjustment circuit also includes an acoustic impedance operational amplifier module, which includes operational amplifier IC6. The non-inverting input terminal of operational amplifier IC6 is electrically connected to the output terminal of operational amplifier IC5 and the VPOWER terminal of the microcontroller. The output terminal of operational amplifier IC6 is electrically connected to the VPOWER1 terminal of the microcontroller.

4. The fully automatic inductance matching system for an ultrasonic cleaning generator according to claim 3, characterized in that: The duty cycle adjustment circuit also includes a follow-up processing display module, which further includes an operational amplifier IC7. The non-inverting input terminal of the operational amplifier IC7 is electrically connected to the output terminal of the operational amplifier IC6 and the VPOWER terminal of the microcontroller. The output terminal of the operational amplifier IC7 is electrically connected to the microcontroller-VPOWER terminal of the microcontroller.

5. The fully automatic inductance matching system for an ultrasonic cleaning generator according to claim 2, characterized in that: The inductance matching and adjustment circuit includes a driver chip U2. The adjustable inductor component includes a drive motor and an adjustable inductor. The AIN terminal of the driver chip U2 is electrically connected to the AIN terminal of the microcontroller. The BIN terminal of the driver chip U2 is electrically connected to the BIN terminal of the microcontroller. The positive terminal of the motor is electrically connected to the AOUT terminal of the chip U2. The negative terminal of the motor is electrically connected to the BOUNT terminal of the chip U2. The adjustable inductor includes an inductor body, a first magnetic core, a second magnetic core, and a linkage component. The first magnetic core and the second magnetic core are respectively inserted into the two ends of the inductor body. The drive motor drives the first magnetic core and the second magnetic core to move closer or further away from each other simultaneously through the linkage component.

6. The fully automatic inductance matching system for an ultrasonic cleaning generator according to claim 5, characterized in that: The linkage assembly includes a first slide, a second slide, a round rod, a first nut, and a second nut. The round rod is driven to the output end of the drive motor. The round rod is provided with a first thread and a second thread in opposite directions at intervals. The first nut is screwed to the first thread, and the second nut is screwed to the second thread. The first nut and the first magnetic core are both disposed on the first slide, and the second nut and the second magnetic core are both disposed on the second slide.

7. A fully automatic inductance matching method for an ultrasonic cleaning generator, characterized in that, An automatic inductance matching system for an ultrasonic cleaning generator as described in any one of claims 1-6, comprising the following steps: A. The ultrasound system is connected to mains power, and the pulse generation circuit generates pulse signals; B. The duty cycle adjustment circuit extracts and rectifies the current signal from the mains power supply, and simultaneously receives the voltage signal sent by the main control circuit; C. The voltage signal and current signal are followed and processed, and the voltage signal and current signal are divided to obtain the acoustic impedance value. The main control circuit reads the acoustic impedance value. D. The main control circuit adjusts the inductance of the adjustable inductor component that forms a resonant circuit with the ultrasonic system through the inductance matching adjustment circuit according to the read acoustic impedance value. Steps A and C are repeated sequentially until the acoustic impedance value in step C is consistent with the acoustic impedance value that needs to be adjusted.

8. The fully automatic inductance matching method for an ultrasonic cleaning generator according to claim 7, characterized in that: In step C, the acoustic impedance signal is processed by an operational amplifier and a follower before being sent to the microcontroller for numerical display.

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