CN114472349B - Self-adaptive frequency matching method - Google Patents
Self-adaptive frequency matching method Download PDFInfo
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- CN114472349B CN114472349B CN202111498154.4A CN202111498154A CN114472349B CN 114472349 B CN114472349 B CN 114472349B CN 202111498154 A CN202111498154 A CN 202111498154A CN 114472349 B CN114472349 B CN 114472349B
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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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- 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
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B3/02—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving a change of amplitude
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a self-adaptive frequency matching method, and relates to the technical field of frequency matching. The invention comprises a generator, wherein one end of the generator is connected with a signal acquisition and processing module, and three different processing modes can be made when the frequency bands of the signal acquisition and processing module matched with the frequency are different. According to the self-adaptive frequency matching method, when the self-adaptive frequency matching method works at the matching frequency, the equivalent impedance of the cleaning tank is small, the Q value is high, the loss is small, under the same conditions of input power and working time, the vibration sound of the self-adaptive frequency matching method is strong, the self-temperature rising speed is low, meanwhile, the sound intensity stability of each point in the whole cleaning tank is greatly improved, the stable sound intensity is particularly good when the high-precision device is cleaned, the self-adaptive frequency matching technology is greatly improved in cleaning effect and service life, the product can be kept to work in the optimal state all the time, and the problem of the difference of matching frequencies of batch products or the same product in different states is solved.
Description
Technical Field
The invention belongs to the technical field of frequency matching, and particularly relates to a self-adaptive frequency matching method.
Background
At present, the ultrasonic cleaning load tank is generally composed of one or more piezoelectric ceramic vibrators, but the resonant frequency of each vibrator is basically impossible to be the same, and is also influenced by various factors (such as cleaning liquid quality, temperature, bonding position and density of a vibrating head, a cleaning tank body structure and the like) in actual use, so that the matching frequency of the cleaning tank can be changed within a certain range in time in the working process.
The existing ultrasonic cleaner generator is one of two driving modes of self-excitation type or fixed frequency other excitation type, obviously the two driving modes are difficult to realize timely, accurate and effective frequency matching, so that the ultrasonic vibrator has the advantages of high temperature rise, high temperature during long-time continuous operation, shortened service life, lower efficiency, poor cleaning effect and poor stability.
Disclosure of Invention
The invention aims to provide a self-adaptive frequency matching method, which solves the problem that the ultrasonic vibrator is fast in temperature rise caused by the generator of the ultrasonic cleaner in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a self-adaptive frequency matching method comprises a generator, wherein one end of the generator is connected with a signal acquisition processing module, and three different processing modes can be made when the frequency bands of the matched frequencies of the signal acquisition processing module are different;
three different processing modes include:
1): the working center frequency rises when the matching frequency is in the low frequency band;
2): the matching frequency enters a temporary steady state to work when in a central frequency band;
3): the working center frequency of the matching frequency is reduced in the high frequency band;
the system transmits the signals processed by the matched frequencies to a signal acquisition processing module for processing and calculation, wherein the signal acquisition processing module comprises a phase and voltage intercepting circuit, a frequency tracking signal integration and reading circuit, and the phase and voltage intercepting circuit is connected with a logic circuit.
Optionally, the phase and voltage clipping circuit includes a resonant output voltage, the resonant output voltage is connected with a first resistor, and the first resistor is connected with a first zero crossing comparison circuit.
Optionally, the phase and voltage clipping circuit further includes a resonant output current, the resonant output current is connected with a second resistor, and the second resistor is connected with a second zero crossing comparison circuit.
Optionally, the logic circuit includes a rectifying circuit, a voltage dividing circuit, and a comparing circuit.
Optionally, the logic circuit further includes a power supply voltage, and the power supply voltage is connected to the first capacitor and the third resistor.
Optionally, the frequency-tracking signal integrating and reading circuit includes a frequency-tracking signal integrating circuit and a frequency-tracking signal reading circuit.
Optionally, the frequency tracking signal integration and reading circuit is connected with a singlechip, the singlechip is connected with an analog-to-digital conversion circuit, the analog-to-digital conversion circuit is connected with a frequency sweep and frequency conversion circuit, and the frequency sweep and frequency conversion circuit is connected with the frequency tracking circuit.
Optionally, the singlechip is connected with a data enabling circuit and a chip enabling circuit, and the chip enabling circuit is connected with a multi-path enabling circuit.
Optionally, the singlechip is connected with a second capacitor and a fourth resistor.
Optionally, the singlechip comprises a frequency band interval circuit and an automatic adjustment circuit.
The embodiment of the invention has the following beneficial effects:
according to the self-adaptive frequency matching method, when the self-adaptive frequency matching method works at the matching frequency, the equivalent impedance of the cleaning tank is small, the Q value is high, the loss is small, the vibration sound of the self-adaptive frequency matching method is strong under the same conditions of the input power and the working time, the self-adaptive frequency matching method is low in self-temperature rising speed, meanwhile, the sound intensity stability of each point in the whole cleaning tank is greatly improved, the stable sound intensity is particularly good in the case of cleaning high-precision devices, the technology of the self-adaptive frequency matching method is greatly improved in cleaning effect and service life, the self-adaptive frequency matching method can keep the product working in the optimal state all the time, and the problem of frequency difference matching of batch products or the same product in different states is solved.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic flow chart of an adaptive frequency matching method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a phase and voltage clipping circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a logic circuit according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a frequency-tracking signal integrating and reading circuit according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a singlechip according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a chip enable circuit according to an embodiment of the invention;
fig. 7 is a schematic view of an ultrasonic transducer characteristic curve according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components thereof have been omitted.
Referring to fig. 1-7, in this embodiment, an adaptive frequency matching method is provided, which includes: one end of the generator is connected with a signal acquisition and processing module, and three different processing modes can be made when the frequency bands of the signal acquisition and processing module matched with the frequency are different;
three different processing modes include:
1): the working center frequency rises when the matching frequency is in the low frequency band;
2): the matching frequency enters a temporary steady state to work when in a central frequency band;
3): the working center frequency of the matching frequency is reduced in the high frequency band;
the system transmits the signals processed by the matched frequencies to a signal acquisition processing module for processing and calculation, wherein the signal acquisition processing module comprises a phase and voltage intercepting circuit, a frequency tracking signal integration and reading circuit, and the phase and voltage intercepting circuit is connected with a logic circuit.
The application of one aspect of the embodiment is: in the diagram, SA and SB two paths of phase signals pass through a zero crossing point comparison circuit to obtain corresponding in-phase square wave signals IO2V_1 and IO2C_1, then a logic circuit is used to obtain a phase synthesis signal CV_IO, IO2C_1 passes through a rectification, voltage division and comparison circuit to obtain two square wave signals of which the resonance output voltage is subjected to wave cutting, then a logic circuit is used to obtain a voltage cutting signal Io_V12, under the control of an MCU1 singlechip system, a periodic sweep frequency band voltage RTA signal is generated, logic time sequence control of the circuit is realized, thus a sweep frequency band is divided into multiple paths of intervals with equal bandwidth, then the phase synthesis signal CV_IO corresponding to each frequency band interval is integrated, finally CV_IO integral data of each frequency band interval is obtained at intervals of fixed interval time intervals under the control of the singlechip system program, the frequency band interval where the matching frequency is located is determined according to a preset algorithm, and the working frequency is automatically adjusted to the frequency band interval where the matching frequency is located through the singlechip system program. It should be noted that all the electric devices referred to in the present application may be powered by a storage battery or an external power source.
When the self-adaptive frequency matching method works at the matching frequency, the equivalent impedance of the cleaning tank is small, the Q value is high, the loss is small, under the same conditions of input power and working time, the vibration sound of the self-adaptive frequency matching method is strong, the self-temperature rising speed is low, meanwhile, the sound intensity stability of each point in the whole cleaning tank of the self-adaptive frequency matching method is greatly improved, the stable sound intensity is particularly good when the high-precision device is cleaned, the technology of the self-adaptive frequency matching method is greatly improved in cleaning effect and service life, the self-adaptive frequency matching method can keep the product working in the optimal state all the time, and the problem of frequency difference matching of batch products or the same product in different states is solved.
The phase and voltage interception circuit of the embodiment comprises a resonance output voltage, wherein the resonance output voltage is connected with a first resistor, the first resistor is connected with a first zero crossing point comparison circuit, the phase and voltage interception circuit further comprises a resonance output current, the resonance output current is connected with a second resistor, and the second resistor is connected with a second zero crossing point comparison circuit.
The logic circuit of the embodiment comprises a rectifying circuit, a voltage dividing circuit and a comparison circuit, and further comprises a power supply voltage, wherein the power supply voltage is connected with a first capacitor and a third resistor, and the third resistor is connected with 5V voltage.
The frequency-tracking signal integrating and reading circuit comprises a frequency-tracking signal integrating circuit and a frequency-tracking signal reading circuit, wherein the frequency-tracking signal integrating and reading circuit is connected with a singlechip, the singlechip is connected with an analog-to-digital conversion circuit, the analog-to-digital conversion circuit is connected with a frequency sweep and frequency conversion circuit, and the frequency sweep and frequency conversion circuit is connected with the frequency-tracking circuit.
The singlechip of this embodiment is connected with data enabling circuit and chip enabling circuit, and chip enabling circuit is connected with multichannel enabling circuit, and the singlechip is connected with second electric capacity and fourth resistance, and the fourth resistance is connected with 5V voltage, and the singlechip includes frequency band interval circuit and automatic adjustment circuit.
Referring to fig. 7, the characteristic curve of impedance versus frequency of the piezoelectric ceramic type ultrasonic vibrator at the series resonance is shown that the impedance is minimum (zmin= 4.70945 Ω) at the integrated resonance frequency point f_a (37.250 KHz), and the impedance is maximum (zmax= 30.4599 Ω) at the point f_a (40.500 KHz) (i.e., the integrated anti-resonance point), which is known from the series resonance characteristics of the piezoelectric ceramic type ultrasonic vibrator: the current between F_a and F_A is large (the frequency band is matched), the quality factor Q value is high, the energy conversion efficiency is high, the vibration is intense, and the cleaning effect is good; in the frequency range smaller than F_a or larger than F_A, the current is sharply reduced, the quality factor Q value is low, the energy conversion efficiency is low, the vibration is weak, and the cleaning effect is extremely poor.
The LC resonance rule indicates that the smaller the phase difference between the output voltage and the current is when the operating frequency is closer to the matching frequency, the smaller the bandwidth of the band interval is, and the higher the frequency tracking accuracy is. When the frequency is matched, the equivalent impedance of the cleaning tank is small, the Q value is high, the loss is small, under the same conditions of input power and working time, the self-temperature rising speed of the vibrator of the existing self-excited and fixed frequency type product is more than 2 times of that of the self-adaptive frequency matching method, the sound intensity of the existing self-excited and fixed frequency vibration is smaller than that of the self-adaptive frequency matching method, and the sound intensity stability of each point in the whole cleaning tank is much worse than that of the self-adaptive frequency matching method.
SA-resonant output voltage phase signal, SB-resonant output current phase signal, io 2C-resonant output voltage amplitude signal, io_V12-resonant output voltage intercept signal, CV_IO-phase synthesis signal, RTA-sweep frequency band voltage signal, RT-frequency conversion signal, PLLV-tracking voltage signal, RC_EN-tracking signal integration enable, ADC_EN-tracking signal read enable, SEN_1_SEN_2_SEN_3-chip enable, A0\A1\A2-data enable, Q1-Q8-multiplexing enable.
The above embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Claims (10)
1. An adaptive frequency matching method, comprising: one end of the generator is connected with a signal acquisition and processing module, and the signal acquisition and processing module can make three different processing modes when the frequency bands of the matched frequencies are different;
three different processing modes include:
1): the working center frequency rises when the matching frequency is in the low frequency band;
2): the matching frequency enters a temporary steady state to work when in a central frequency band;
3): the working center frequency of the matching frequency is reduced in the high frequency band;
the system transmits the signals processed by the matched frequencies to a signal acquisition processing module for processing and calculation, wherein the signal acquisition processing module comprises a phase and voltage intercepting circuit, a frequency tracking signal integration and reading circuit, and the phase and voltage intercepting circuit is connected with a logic circuit;
the method for processing and calculating by the signal acquisition and processing module comprises the following steps: the method comprises the steps that two paths of phase signals of a resonance output voltage phase signal SA and a resonance output current phase signal SB pass through a zero crossing point comparison circuit to obtain corresponding in-phase square wave signals IO2V_1 and IO2C_1, then a logic circuit is used to obtain phase synthesis signals CV_IO, the IO2C_1 passes through rectification, voltage division and comparison circuits to obtain two square wave signals of Io_v1 and Io_v2, the two square wave signals cut off resonance output voltage are obtained, then the voltage interception signal Io_v12 is obtained after passing through the logic circuit, under the control of an MCU1 singlechip system, a periodic sweep frequency band voltage signal RTA is generated, meanwhile, logic time sequence control of the circuit is realized, so that sweep frequency bands are divided into multipath sections with equal bandwidths, then phase synthesis signals CV_IO corresponding to each frequency band section are integrated, CV_IO integral data of each frequency band section are obtained at fixed interval time intervals under the control of a singlechip system program, the frequency band section where matching frequency is located is determined according to a preset algorithm, and the frequency band section where the matching frequency is located, and the working center frequency is automatically adjusted to the frequency band section where the matching frequency is located through the singlechip system program.
2. The adaptive frequency matching method of claim 1, wherein the phase and voltage clipping circuit comprises a resonant output voltage phase signal, the resonant output voltage phase signal being coupled to a first resistor, the first resistor being coupled to a first zero crossing comparison circuit.
3. The adaptive frequency matching method of claim 2, wherein the phase and voltage clipping circuit further comprises a resonant output current phase signal, the resonant output current phase signal coupled to a second resistor, the second resistor coupled to a second zero crossing comparison circuit.
4. The adaptive frequency matching method of claim 3, wherein the logic circuit comprises a rectifying circuit, a voltage dividing circuit, and a comparing circuit.
5. The adaptive frequency matching method of claim 4, wherein the logic circuit further comprises a supply voltage, the supply voltage being coupled to the first capacitor and the third resistor.
6. The adaptive frequency matching method of claim 5, wherein the frequency tracking signal integrating and reading circuit comprises a frequency tracking signal integrating circuit and a frequency tracking signal reading circuit.
7. The adaptive frequency matching method of claim 6, wherein the frequency tracking signal integrating and reading circuit is connected with a single chip microcomputer, the single chip microcomputer is connected with an analog-to-digital conversion circuit, the analog-to-digital conversion circuit is connected with a frequency sweeping and frequency conversion circuit, and the frequency sweeping and frequency conversion circuit is connected with the frequency tracking circuit.
8. The adaptive frequency matching method of claim 7, wherein the single chip microcomputer is connected with a data enabling circuit and a chip enabling circuit, and the chip enabling circuit is connected with a multi-path enabling circuit.
9. The adaptive frequency matching method of claim 7, wherein the single chip microcomputer is connected with a second capacitor and a fourth resistor.
10. The adaptive frequency matching method of claim 9, wherein the single chip microcomputer comprises a band interval circuit and an automatic adjustment circuit.
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| CN114472349B true CN114472349B (en) | 2023-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4836684A (en) * | 1988-02-18 | 1989-06-06 | Ultrasonic Power Corporation | Ultrasonic cleaning apparatus with phase diversifier |
| JPH06335084A (en) * | 1993-05-25 | 1994-12-02 | Kaijo Corp | Ultrasonic oscillator capable of monitoring oscillation frequency |
| JP2002059094A (en) * | 2000-08-21 | 2002-02-26 | Hajime Shibata | Apparatus for ultrasonic cleaning |
| JP5000671B2 (en) * | 2009-01-30 | 2012-08-15 | 株式会社カイジョー | Ultrasonic oscillator and ultrasonic cleaning device |
| CN106516487A (en) * | 2016-12-16 | 2017-03-22 | 广州大学 | Garbage recognizing and classifying device and method |
| CN113102208B (en) * | 2021-04-16 | 2022-05-31 | 东莞声索电子有限公司 | Automatic frequency tracking device and automatic frequency tracking method for generator of ultrasonic cleaning machine |
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