CN216846528U

CN216846528U - Ultrasonic self-excitation circuit with adjustable amplitude and intensity

Info

Publication number: CN216846528U
Application number: CN202220500957.2U
Authority: CN
Inventors: 王刚; 韩啸; 杨国鹏; 姚俊静
Original assignee: Hunan Lifan Jiaxin Medical Technology Co ltd
Current assignee: Hunan Lifan Jiaxin Medical Technology Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-06-28
Anticipated expiration: 2032-03-09

Abstract

The utility model discloses an ultrasonic self-excitation circuit with adjustable amplitude and intensity, which comprises a start-stop circuit and an oscillation circuit which are connected with each other; the oscillation circuit is used for correspondingly generating changes according to pulse waveforms with different duty ratios and different frequencies input by the start-stop circuit so as to realize the output of an ultrasonic oscillation mode with target intensity and target amplitude; wherein the oscillation circuit comprises a capacitive three-point self-oscillation circuit. The circuit is simple in structure and strong in stability, and has a good using effect on equipment needing to frequently change the intensity of ultrasonic waves. The output intensity of the ultrasound can be sensitively adjusted, and the ultrasonic wave generator can be applied to equipment or environments needing accurate output. Compared with other circuits and methods, the circuit has the advantages of low cost, simple structure, no mechanical requirement and high stability, and can be suitable for various occasions needing program control. Is worthy of being popularized and used in large area.

Description

Ultrasonic self-excitation circuit with adjustable amplitude and intensity

Technical Field

The utility model relates to an integrated circuit technical field especially relates to an supersound self excitation circuit of adjustable amplitude and intensity.

Background

Ultrasonic waves are mechanical waves of extremely short wavelength, typically shorter than 2cm (centimeters) in air. It must rely on a medium for propagation and cannot exist in vacuum (such as space). The water-based ultrasonic wave generator has a longer propagation distance in water than in air, but is easy to lose in air due to the short wavelength, is easy to scatter, is not as far as audible sound and infrasonic wave, but is easy to obtain anisotropic sound energy due to the short wavelength, and can be used for cleaning, crushing stones, sterilizing and disinfecting and the like. Has a plurality of applications in medicine and industry.

With the development of science and technology, ultrasonic technology is widely applied to various industries such as inspection, cleaning, humidification, medical inspection and the like, and amplitude and intensity control needs to be carried out on ultrasonic output in many scenes. Ultrasonic waves are used in many occasions, manual adjustment modes are mostly adopted, and no perfect method is available at present for application occasions needing accurate control or real-time adjustment.

The ultrasonic control is mainly realized by adopting a mechanical control mode and a manual regulation mode, and the ultrasonic control is dependent on the mechanical control mode, has low regulation precision and poor real-time feedback, and can not meet the occasions with higher requirements on real-time performance and accuracy.

SUMMERY OF THE UTILITY MODEL

The utility model provides an supersound self excitation circuit of adjustable amplitude and intensity.

The utility model provides a following scheme:

an ultrasonic self-excitation circuit with adjustable amplitude and intensity, comprising:

the start-stop circuit and the oscillating circuit are connected; the oscillation circuit is used for correspondingly generating changes according to pulse waveforms with different duty ratios and different frequencies input by the start-stop circuit so as to realize the output of an ultrasonic oscillation mode with target intensity and target amplitude;

wherein the oscillation circuit comprises a capacitive three-point self-oscillation circuit.

Preferably: the oscillating circuit comprises a variable resistor, a second fixed resistor and an ultrasonic piezoelectric transducer which are connected in sequence; adjusting the variable resistance intensity magnitude to obtain the target intensity.

Preferably: the variable resistor is any one of a mechanical slide rheostat and a program control resistor chip.

Preferably: the frequency of the oscillating circuit is consistent with the natural frequency of the ultrasonic piezoelectric transducer.

Preferably: the natural frequency is 1 megahertz.

Preferably: the oscillating circuit further comprises a first resonant tank connected to the ultrasonic piezoelectric transducer through a second capacitor; the first resonant tank is used for controlling the oscillation amplitude of the oscillation circuit.

Preferably: the tank circuit further comprises a second resonant tank connected to the ultrasonic piezoelectric transducer; the first resonant circuit is connected to a collector electrode of a second triode, the second resonant circuit is respectively connected to an emitting electrode and a base electrode of the second triode, and the base electrode of the second triode is connected between the second fixed resistor and the ultrasonic piezoelectric transducer.

Preferably: the second transistor has a frequency greater than 10 megahertz.

Preferably: the start-stop circuit comprises a first fixed resistor, a third fixed resistor, a fourth fixed resistor, a fifth fixed resistor, a first triode and a third triode, wherein one end of the first fixed resistor is connected with the power module and the emitting electrode of the first triode, and two ends of the third fixed resistor are respectively connected with the first fixed resistor and the collecting electrode of the third triode; a collector of the first triode is connected with the oscillating circuit, and a base of the first triode is connected between the first fixed resistor and the third fixed resistor; one end of each of the fourth fixed resistor and the fifth fixed resistor is connected with a base electrode of the third triode, and an emitting electrode of the third triode is connected to the fifth fixed resistor; and one end of the fourth fixed resistor, which is far away from the third triode, is used for being connected with a pulse width modulation input end.

According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:

by the utility model, an ultrasonic self-excitation circuit with adjustable amplitude and intensity can be realized, and in an implementation mode, the circuit can comprise a start-stop circuit and an oscillating circuit which are connected; the oscillation circuit is used for correspondingly generating changes according to pulse waveforms with different duty ratios and different frequencies input by the start-stop circuit so as to realize the output of an ultrasonic oscillation mode with target intensity and target amplitude; wherein the oscillation circuit comprises a capacitive three-point self-oscillation circuit. The application provides an supersound self excitation circuit of adjustable amplitude and intensity, circuit structure is simple, and stability is strong, to the equipment that needs frequently change ultrasonic wave intensity, has better result of use. The output intensity of the ultrasound can be sensitively adjusted, and the ultrasonic wave generator can be applied to equipment or environments needing accurate output. Compared with other circuits and methods, the circuit has the advantages of low cost, simple structure, no mechanical requirement and high stability, and can be suitable for various occasions needing program control. Is worthy of large-area popularization and application.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of an ultrasonic self-excitation circuit with adjustable amplitude and intensity according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

Examples

Referring to fig. 1, for the ultrasonic self-excitation circuit with adjustable amplitude and intensity provided by the embodiment of the present invention, as shown in fig. 1, the circuit may include a start-stop circuit a1 and an oscillation circuit a2 connected to each other; the oscillation circuit A2 is used for correspondingly generating changes according to pulse waveforms with different duty ratios and different frequencies input by the start-stop circuit A1 so as to realize the output of an ultrasonic oscillation mode with target intensity and target amplitude;

wherein the oscillation circuit A2 comprises a capacitance three-point self-oscillation circuit.

According to the ultrasonic self-excited circuit with the adjustable amplitude and intensity, the circuit adopts a capacitance three-point self-excited oscillator to directly push an ultrasonic transducer to work, and larger power output can be realized; the circuit can sensitively adjust the output intensity of the ultrasonic wave through the access of the programmable rheostat, and can be applied to equipment or environment needing accurate output. The circuit has the advantages of simple structure, low cost, no mechanical requirement and high stability.

Specifically, the oscillation circuit comprises a variable resistor RJ1, a second fixed resistor R2 and an ultrasonic piezoelectric transducer P1 which are connected in sequence; adjusting the variable resistance RJ1 intensity magnitude to obtain the target intensity. The variable resistor RJ1 is any one of a mechanical sliding rheostat and a program control resistor chip. The frequency of the oscillating circuit coincides with the natural frequency of the ultrasonic piezoelectric transducer P1. The natural frequency is 1 megahertz.

The oscillating circuit further comprises a first resonant tank connected to the ultrasonic piezoelectric transducer P1 through a second capacitor C2; the first resonant tank is used for controlling the oscillation amplitude of the oscillation circuit. Wherein the first resonant tank comprises a first capacitor C1 and a first strip core inductor L1. The tank circuit further comprises a second resonant tank connected to the ultrasonic piezoelectric transducer P1; the first resonant loop is connected to a collector of a second triode Q2, the second resonant loop is respectively connected to an emitter and a base of the second triode Q2, and the base of the second triode Q2 is connected between the second fixed resistor R2 and the ultrasonic piezoelectric transducer P1. Wherein the second resonant tank comprises a first capacitor C2 and a first strip-core inductor L2. The second transistor has a frequency greater than 10 megahertz.

The high-power high-frequency oscillation circuit provided by the embodiment of the application can be a high-power high-frequency oscillation circuit consisting of RJ1, R2, P1, C2, L1, C1, Q2, C3 and L2, a capacitance three-point oscillation circuit is adopted, and the oscillation frequency of the circuit is 1MHz of the natural frequency of the ultrasonic piezoelectric transducer P1. L1 and C1, L2 and C3 form two independent resonant circuits respectively, guarantee the stability of integral oscillation, keep the stable work under the high-power; in the circuit, a triode Q2 is a key device, and the required frequency is more than 10 MHz; the oscillation amplitude of the circuit is determined by L1 and C1; the output intensity of the circuit is jointly acted by RJ1 and R2, and the intensity can be changed by adjusting RJ 1; the RJ1 circuit can use mechanic sliding rheostat, and also can use program control resistance chip to facilitate program control setting.

Further, the start-stop circuit a1 includes a first fixed resistor R1, a third fixed resistor R3, a fourth fixed resistor R4, a fifth fixed resistor R5, a first triode Q1, and a third triode Q3, one end of the first fixed resistor R1 is connected to the power module PWR1 and the emitter of the first triode Q3, and two ends of the third fixed resistor R3 are connected to the collectors of the first fixed resistor R1 and the third triode Q3, respectively; the collector of the first triode Q1 is connected with the oscillation circuit, and the base of the first triode Q1 is connected between the first fixed resistor R1 and the third fixed resistor R3; one end of each of the fourth fixed resistor R4 and the fifth fixed resistor R5 is connected to the base of the third transistor Q3, and the emitter of the third transistor Q3 is connected to the fifth fixed resistor R5; the end of the fourth fixed resistor R4 remote from the third transistor Q3 is used for connecting to a pulse width modulation input (PWM).

In a word, the ultrasonic self-excitation circuit of adjustable amplitude and intensity that this application provided, circuit structure is simple, and stability is strong, to the equipment that needs frequent change ultrasonic wave intensity, has better result of use. The output intensity of the ultrasound can be sensitively adjusted, and the ultrasonic wave generator can be applied to equipment or environments needing accurate output. Compared with other circuits and methods, the circuit has the advantages of low cost, simple structure, no mechanical requirement and high stability, and can be suitable for various occasions needing program control. Is worthy of large-area popularization and application.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 a process, method, article, or apparatus that comprises the element.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. An ultrasonic self-excitation circuit with adjustable amplitude and intensity is characterized by comprising a start-stop circuit and an oscillation circuit which are connected; the oscillation circuit is used for correspondingly generating changes according to pulse waveforms with different duty ratios and different frequencies input by the start-stop circuit so as to realize the output of an ultrasonic oscillation mode with target intensity and target amplitude;

2. The amplitude and intensity tunable ultrasonic self-excitation circuit of claim 1, wherein the oscillation circuit comprises a variable resistor, a second fixed resistor and an ultrasonic piezoelectric transducer connected in sequence; adjusting the variable resistance intensity magnitude to obtain the target intensity.

3. The ultrasonic self-excitation circuit with adjustable amplitude and intensity as defined in claim 2, wherein the variable resistor is any one of a mechanical slide rheostat and a programmable resistor chip.

4. An adjustable amplitude and intensity ultrasonic self-excitation circuit as defined in claim 2, wherein the frequency of the oscillation circuit coincides with the natural frequency of the ultrasonic piezoelectric transducer.

5. An amplitude and intensity tunable ultrasonic self-excitation circuit according to claim 4, wherein the natural frequency is 1 megahertz.

6. An amplitude and intensity tunable ultrasonic self-excitation circuit according to claim 2, wherein the oscillation circuit further comprises a first resonant tank connected to the ultrasonic piezoelectric transducer through a second capacitor; the first resonant tank is used for controlling the oscillation amplitude of the oscillation circuit.

7. An adjustable amplitude and intensity ultrasonic self-excitation circuit according to claim 6, wherein the oscillation circuit further comprises a second resonant tank connected to the ultrasonic piezoelectric transducer; the first resonant circuit is connected to a collector electrode of a second triode, the second resonant circuit is respectively connected to an emitting electrode and a base electrode of the second triode, and the base electrode of the second triode is connected between the second fixed resistor and the ultrasonic piezoelectric transducer.

8. The tunable amplitude and intensity ultrasonic self-excitation circuit of claim 7, wherein the frequency of the second transistor is greater than 10 mhz.

9. The amplitude and intensity adjustable ultrasonic self-excitation circuit according to claim 1, wherein the start-stop circuit comprises a first fixed resistor, a third fixed resistor, a fourth fixed resistor, a fifth fixed resistor, a first triode and a third triode, one end of the first fixed resistor is connected with the power module and the emitter of the first triode, and two ends of the third fixed resistor are respectively connected with the collectors of the first fixed resistor and the third triode; a collector of the first triode is connected with the oscillating circuit, and a base of the first triode is connected between the first fixed resistor and the third fixed resistor; one end of each of the fourth fixed resistor and the fifth fixed resistor is connected with a base electrode of the third triode, and an emitting electrode of the third triode is connected to the fifth fixed resistor; and one end of the fourth fixed resistor, which is far away from the third triode, is used for being connected with a pulse width modulation input end.