CN113787050B - Ultrasonic cleaner with controllable ultrasonic output waveform - Google Patents
Ultrasonic cleaner with controllable ultrasonic output waveform Download PDFInfo
- Publication number
- CN113787050B CN113787050B CN202111132844.8A CN202111132844A CN113787050B CN 113787050 B CN113787050 B CN 113787050B CN 202111132844 A CN202111132844 A CN 202111132844A CN 113787050 B CN113787050 B CN 113787050B
- Authority
- CN
- China
- Prior art keywords
- ultrasonic
- ultrasonic wave
- resistor
- control board
- alternating current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
-
- 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
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses an ultrasonic cleaner with controllable ultrasonic output waveforms, which comprises a control board, wherein the control board is connected with the ultrasonic cleaner; the control panel is provided with a phase detection circuit and an ultrasonic wave generation circuit; the ultrasonic output waveform control method comprises the following steps: s1, a control board controls a phase detection circuit to detect the phase of input alternating current; s2, determining the starting and stopping positions of the ultrasonic sweep; s3, determining the width of the frequency sweep and the frequency point number of the frequency sweep; s4, determining the position distribution of each frequency point in each period of the ultrasonic output waveform; s5, the control board controls the ultrasonic generator to output waveforms; changing the power of the ultrasonic wave under the condition that the output amplitude of the ultrasonic wave is unchanged by changing the frequency point of the sweep frequency along with the phase change of the alternating current; thus, in each period of the alternating current, the output waveform of the ultrasonic wave is controllable, stable output is achieved, and a stable cleaning effect is achieved; reducing the risk of damaging the transducer and the cleaning tank.
Description
Technical Field
The invention relates to the technical field of ultrasonic sweep frequency, in particular to an ultrasonic cleaner with controllable ultrasonic output waveforms.
Background
At present, the common ultrasonic cleaner with the frequency sweeping function in the market has a single frequency sweeping mode, is random or has uncontrollable ultrasonic output waveforms. Because the amplitude of the output waveform of the ultrasonic wave is related to the resonance frequency point and the input voltage, when the input voltage is higher and is at the resonance frequency point, the peak value of the output voltage of the ultrasonic wave is higher, and the transducer and the cleaning tank can be damaged by too high peak value, so that the frequency sweeping mode can inevitably lead to inconsistent output waveform of the ultrasonic wave in each period of the alternating current, the cleaning effect and the stability of the ultrasonic wave are affected, and the ultrasonic transducer and the cleaning tank are more easily damaged.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an ultrasonic cleaner with controllable ultrasonic output waveforms.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an ultrasonic cleaner with controllable ultrasonic output waveforms comprises a control board; the control panel is provided with a phase detection circuit and an ultrasonic wave generation circuit; the ultrasonic output waveform control method comprises the following steps of:
s1, the control board controls the phase detection circuit to detect the phase of input alternating current;
s2, determining the start-stop positions of the ultrasonic sweep, and performing corresponding delay judgment in the program of the control board to judge the phase zero point of the alternating current signal, wherein the phase zero point can be used as the start-stop positions of the sweep;
s3, determining the width of the sweep frequency and the frequency point number of the sweep frequency;
s4, determining the position distribution of each frequency point in each period of the ultrasonic output waveform, and controlling the output amplitude waveform through proper frequency point distribution so as to avoid the occurrence of excessive amplitude;
s5, the control board controls the ultrasonic generator to output waveforms;
the ultrasonic cleaner further comprises a main body and a transducer; a cleaning tank is arranged in the main body, and the transducer is arranged on the main body; the ultrasonic generator is connected with the transducer; the transducer converts ultrasonic waves emitted by the ultrasonic generator into mechanical vibration; the mechanical vibration drives micro-bubbles of the liquid in the cleaning tank to vibrate, so that the adsorption of dirt and the surface of the cleaning piece is destroyed;
the phase detection circuit comprises a first rectifier bridge, a first optocoupler, a first resistor, a second resistor, a third resistor, a fourth resistor and a first capacitor; the alternating current outputs 100hz alternating current through the first rectifier bridge, and then is transmitted to the control board through the first optocoupler, the first resistor, the second resistor, the third resistor, the fourth resistor and the first capacitor;
the ultrasonic wave generating circuit comprises a first ultrasonic wave generating circuit and a second ultrasonic wave generating circuit, and the first ultrasonic wave generating circuit and the second ultrasonic wave generating circuit are respectively provided with an ultrasonic wave driving circuit and a power amplifying circuit; the ultrasonic wave passes through the ultrasonic driving circuit to drive and generate, and then passes through the power amplifying circuit to amplify the ultrasonic wave power.
Preferably, the alternating current in S1 is 220V alternating current.
Compared with the prior art, the invention has the beneficial effects that:
the invention designs an ultrasonic cleaner with controllable ultrasonic output waveform, which changes the power of ultrasonic waves under the condition that the amplitude of ultrasonic output is unchanged by changing the frequency point of sweep frequency along with the phase change of alternating current; thus, in each period of the alternating current, the output waveform of the ultrasonic wave is controllable, stable output is achieved, and a stable cleaning effect is achieved; reducing the risk of damaging the transducer and the cleaning tank; the method comprises the steps of converting acoustic energy of a power ultrasonic frequency source of an ultrasonic generator into mechanical vibration through a transducer, and radiating ultrasonic waves to cleaning liquid in a tank through a cleaning tank wall; the micro bubbles in the liquid in the cleaning tank can keep vibrating under the action of the sound wave due to the radiation of the ultrasonic wave; the adsorption of dirt and the surface of the cleaning piece is destroyed, the fatigue failure of the dirt layer is caused to be refuted, and the vibration of the gas bubbles scrubs the solid surface.
Drawings
FIG. 1 is a schematic diagram showing the steps of controlling the waveform of ultrasonic output according to the present invention;
fig. 2 is a schematic circuit diagram of a control board according to the present invention;
fig. 3 is a schematic diagram of a phase detection circuit according to the present invention;
FIG. 4 is a schematic diagram of a waveform of an input voltage rectified by a first rectifier bridge according to the present invention;
fig. 5 is a schematic diagram of phase zero detection according to the present invention;
FIG. 6 is a schematic view of an ultrasonic cleaner according to the present invention;
fig. 7 is a schematic structural diagram of a first ultrasonic wave generating circuit according to the present invention;
fig. 8 is a schematic diagram of a second ultrasonic wave generating circuit according to the present invention.
Legend description:
1. the main body, the 2, the transducer,
3. an ultrasonic generator, 4, a cleaning tank,
u3, a control board, DB2, a first rectifier bridge,
u6, a first optocoupler, R33, a first resistor,
r13, a second resistor, R20, a third resistor,
r42, fourth resistor, C11, first capacitor.
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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 8, an ultrasonic cleaner with controllable ultrasonic output waveforms includes a control board U3; the control board U3 is provided with a phase detection circuit and an ultrasonic wave generation circuit; the ultrasonic output waveform control method comprises the following steps: s1, a control board U3 controls a phase detection circuit to detect the phase of input alternating current; s2, determining the start-stop positions of the ultrasonic sweep, and performing corresponding delay judgment in the program of the control board U3 to judge the phase zero point of the alternating current signal, wherein the phase zero point can be used as the start-stop positions of the sweep; s3, determining the width of the frequency sweep and the frequency point number of the frequency sweep; s4, determining the position distribution of each frequency point in each period of the ultrasonic output waveform, and controlling the output amplitude waveform through proper frequency point distribution so as to avoid the occurrence of excessive amplitude; s5, controlling the ultrasonic generator to output waveforms by the control board U3; the ultrasonic cleaner also comprises a main body 1, a transducer 2 and an ultrasonic generator 3; a cleaning tank 4 is arranged in the main body 1, and the transducer 2 is arranged on the main body 1; the ultrasonic generator 3 is connected with the transducer 2, and converts the sound energy of a power ultrasonic frequency source of the ultrasonic generator 3 into mechanical vibration through the transducer 2, and radiates ultrasonic waves to the cleaning liquid in the tank through the cleaning tank wall; the microbubbles in the liquid in the cleaning tank 4 can keep vibrating under the action of the sound wave due to the radiation of the ultrasonic wave; the adsorption of dirt and the surface of the cleaning piece is destroyed, the fatigue failure of the dirt layer is caused to be refuted, and the vibration of the gas bubbles scrubs the solid surface.
The phase detection circuit comprises a first rectifier bridge DB2, a first optocoupler U6, a first resistor R33, a second resistor R13, a third resistor R20, a fourth resistor R42 and a first capacitor C11; the alternating current outputs 100hz alternating current through a first rectifier bridge DB2, and then is transmitted to a control board U3 through a first optocoupler U6, a first resistor R33, a second resistor R13, a third resistor R20, a fourth resistor R42 and a first capacitor C11; the alternating current in S1 is 220V alternating current, and after passing through the first rectifier bridge DB2, a sine wave of a positive half cycle of 100hz is output, as shown in FIG. 4, and each cycle is 10ms; the alternating current of 100hz is subjected to the action of the first optocoupler U6, the first resistor R33, the second resistor R13 and the third resistor R20 to obtain signals shown in fig. 5 at the nodes of the fourth resistor R42 and the first capacitor C11, the signals are detected through an external interrupt rising edge IO port of the control board U3, the actual real zero crossing point is in the middle of one pulse width of the D waveform, corresponding delay judgment is carried out in the program of the control board, and the phase zero point of the alternating current signals can be judged, and the points can be used as the starting and stopping positions of the sweep frequency.
The ultrasonic wave generating circuit comprises a first ultrasonic wave generating circuit and a second ultrasonic wave generating circuit, and the first ultrasonic wave generating circuit and the second ultrasonic wave generating circuit are respectively provided with an ultrasonic wave driving circuit and a power amplifying circuit; the ultrasonic wave is driven to occur by an ultrasonic driving circuit, and then the ultrasonic wave power is amplified by a power amplifying circuit; two pairs of complementary sweep signals PWMA and PWMB with the same period are generated by a control panel U3, and the subsequent power amplifying circuit is driven and amplified by U1 and U2. The position distribution of each frequency point in 10ms of the half period of alternating current is determined by setting the width of PWMA and the frequency point number of the PWMB frequency sweep through a control board U3, for example, setting the frequency sweep width to 2KHZ and the frequency point number to 20, then the step of the frequency sweep is 100HZ, and the duration of each frequency point is 500us; the position distribution of each frequency point in the period of 10ms of alternating current can be determined only by determining the initial frequency of the sweep frequency, the peak voltage of the alternating current is the maximum at the position of 5ms through the graph 4, the output amplitude waveform can be controlled through proper frequency point distribution, the occurrence of overhigh amplitude is avoided, the damage to the transducer and the built-in groove is avoided, the output stability in each period is also ensured, and the cleaning effect is ensured.
The number of the frequency sweeping frequency points can be reduced, for example, only 9ms has ultrasonic output in a period of 10ms, so that the power can be reduced under the condition of not changing the output amplitude. For example, the amplitude of the output voltage in the latter half is greater than that in the former half, indicating that the resonance point is placed in the latter half of the 10Ms period.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (2)
1. An ultrasonic cleaner with controllable ultrasonic output waveforms comprises a control board; the control panel is provided with a phase detection circuit and an ultrasonic wave generation circuit; the method is characterized in that the ultrasonic output waveform is controllable and comprises the following steps:
s1, the control board controls the phase detection circuit to detect the phase of input alternating current;
s2, determining the start-stop positions of the ultrasonic sweep, and performing corresponding delay judgment in the program of the control board to judge the phase zero point of the alternating current signal, wherein the phase zero point can be used as the start-stop positions of the sweep;
s3, determining the width of the sweep frequency and the frequency point number of the sweep frequency;
s4, determining the position distribution of each frequency point in each period of the ultrasonic output waveform, and controlling the output amplitude waveform through proper frequency point distribution so as to avoid the occurrence of excessive amplitude;
s5, the control board controls the ultrasonic generator to output waveforms;
the ultrasonic cleaner further comprises a main body and a transducer; a cleaning tank is arranged in the main body, and the transducer is arranged on the main body; the ultrasonic generator is connected with the transducer; the transducer converts ultrasonic waves emitted by the ultrasonic generator into mechanical vibration; the mechanical vibration drives micro-bubbles of the liquid in the cleaning tank to vibrate, so that the adsorption of dirt and the surface of the cleaning piece is destroyed;
the phase detection circuit comprises a first rectifier bridge, a first optocoupler, a first resistor, a second resistor, a third resistor, a fourth resistor and a first capacitor; the commercial power outputs 100hz alternating current through the first rectifier bridge and is transmitted to the control board through the first optocoupler, the first resistor, the second resistor, the third resistor, the fourth resistor and the first capacitor;
the ultrasonic wave generating circuit comprises a first ultrasonic wave generating circuit and a second ultrasonic wave generating circuit, and the first ultrasonic wave generating circuit and the second ultrasonic wave generating circuit are respectively provided with an ultrasonic wave driving circuit and a power amplifying circuit; the ultrasonic wave passes through the ultrasonic driving circuit to drive and generate, and then passes through the power amplifying circuit to amplify the ultrasonic wave power.
2. The ultrasonic cleaning machine with controllable ultrasonic output waveforms as claimed in claim 1, wherein the alternating current in S1 is 220V alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132844.8A CN113787050B (en) | 2021-09-27 | 2021-09-27 | Ultrasonic cleaner with controllable ultrasonic output waveform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132844.8A CN113787050B (en) | 2021-09-27 | 2021-09-27 | Ultrasonic cleaner with controllable ultrasonic output waveform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113787050A CN113787050A (en) | 2021-12-14 |
| CN113787050B true CN113787050B (en) | 2023-08-18 |
Family
ID=78877269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111132844.8A Active CN113787050B (en) | 2021-09-27 | 2021-09-27 | Ultrasonic cleaner with controllable ultrasonic output waveform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113787050B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637947A (en) * | 1994-01-05 | 1997-06-10 | Technologies Gmbh & Co. Branson Ultraschall Niederlassung Der Emerson | Method and apparatus for operating a generator supplying a high-frequency power to an ultrasonic transducer |
| KR970060883U (en) * | 1997-09-20 | 1997-12-10 | 이흥구 | Oscillator for ultrasonic cleaner |
| JP2001149863A (en) * | 1999-11-29 | 2001-06-05 | Matsushita Electric Ind Co Ltd | Device and method for generating ultrasonic vibration, and bump jointing device |
| CN1759471A (en) * | 2003-02-06 | 2006-04-12 | 兰姆研究有限公司 | Increasing megasonic cleaning efficiency by auto-tuning the RF generator at a constant maximum efficiency |
| CN201063054Y (en) * | 2007-06-27 | 2008-05-21 | 临安科星电子有限公司 | Isolated circuit for detecting power supply phase |
| CN201742308U (en) * | 2010-01-06 | 2011-02-09 | 必能信超声(上海)有限公司 | Ultrasonic cleaning machine circuit |
| CN202356278U (en) * | 2011-12-15 | 2012-08-01 | 广州市美锐美容健康设备实业有限公司 | Automatic frequency-sweeping intelligent ultrasonic generator |
| CN103151949A (en) * | 2013-03-18 | 2013-06-12 | 无锡南方声学工程有限公司 | Power supply of ultrasonic cleaning machine |
| CN103567134A (en) * | 2013-11-11 | 2014-02-12 | 河海大学常州校区 | Matching device and matching method for ultrasonic power supply |
| CN204376726U (en) * | 2014-12-25 | 2015-06-03 | 江阴鼎天科技有限公司 | Ultrasonic Intelligent cleaning machine power-supply system |
| CN109883537A (en) * | 2019-02-28 | 2019-06-14 | 重庆西山科技股份有限公司 | Ultrasonic transducer and method for determining resonant frequency based on direct current |
-
2021
- 2021-09-27 CN CN202111132844.8A patent/CN113787050B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637947A (en) * | 1994-01-05 | 1997-06-10 | Technologies Gmbh & Co. Branson Ultraschall Niederlassung Der Emerson | Method and apparatus for operating a generator supplying a high-frequency power to an ultrasonic transducer |
| KR970060883U (en) * | 1997-09-20 | 1997-12-10 | 이흥구 | Oscillator for ultrasonic cleaner |
| JP2001149863A (en) * | 1999-11-29 | 2001-06-05 | Matsushita Electric Ind Co Ltd | Device and method for generating ultrasonic vibration, and bump jointing device |
| CN1759471A (en) * | 2003-02-06 | 2006-04-12 | 兰姆研究有限公司 | Increasing megasonic cleaning efficiency by auto-tuning the RF generator at a constant maximum efficiency |
| CN201063054Y (en) * | 2007-06-27 | 2008-05-21 | 临安科星电子有限公司 | Isolated circuit for detecting power supply phase |
| CN201742308U (en) * | 2010-01-06 | 2011-02-09 | 必能信超声(上海)有限公司 | Ultrasonic cleaning machine circuit |
| CN202356278U (en) * | 2011-12-15 | 2012-08-01 | 广州市美锐美容健康设备实业有限公司 | Automatic frequency-sweeping intelligent ultrasonic generator |
| CN103151949A (en) * | 2013-03-18 | 2013-06-12 | 无锡南方声学工程有限公司 | Power supply of ultrasonic cleaning machine |
| CN103567134A (en) * | 2013-11-11 | 2014-02-12 | 河海大学常州校区 | Matching device and matching method for ultrasonic power supply |
| CN204376726U (en) * | 2014-12-25 | 2015-06-03 | 江阴鼎天科技有限公司 | Ultrasonic Intelligent cleaning machine power-supply system |
| CN109883537A (en) * | 2019-02-28 | 2019-06-14 | 重庆西山科技股份有限公司 | Ultrasonic transducer and method for determining resonant frequency based on direct current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113787050A (en) | 2021-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201742308U (en) | Ultrasonic cleaning machine circuit | |
| CN113787050B (en) | Ultrasonic cleaner with controllable ultrasonic output waveform | |
| CN204241897U (en) | A multifunctional ultrasonic transducer driving circuit | |
| KR20200133701A (en) | Ultrasonic cleaning station using dual frequency | |
| CN201123804Y (en) | Three-frequency ultrasonic cleaning machine | |
| Buasri et al. | Comparison of switching strategies for an ultrasonic cleaner | |
| KR102209002B1 (en) | Ultrasonic cleaning station responding cleansing environmental change | |
| CN103084295A (en) | Driving method and driving circuit of ultrasonic atomizer transduction piece | |
| CN201644359U (en) | Separately-excited sweep-frequency ultrasonic generator | |
| CN202700773U (en) | Triple-frequency ultrasonic generator | |
| CN101125327B (en) | Ultrasonic driving device with complex frequency scanning | |
| US7669478B2 (en) | Ultrasonic driving device with multi-frequency scanning | |
| CN203184277U (en) | Automatic washing machine based on ultrasonic waves | |
| CN109450308A (en) | Wave drive dynamic control device and method | |
| KR100972085B1 (en) | Method for suppling maximum efficiency power of ultrasonic cleaner | |
| CN201423362Y (en) | Automatic frequency-hopping ultrasonic washing machine | |
| CN110125084A (en) | A kind of supersonic wave cleaning machine and its cleaning control method | |
| CN214256175U (en) | Motor drive circuit and electric toothbrush | |
| CN208562850U (en) | A kind of portable ultraphonic washer | |
| CN109499992B (en) | Ultrasonic resonance frequency matching device | |
| CN106510503A (en) | Ultrasonic vegetable cleaning device | |
| Fabijanski et al. | Series resonant converter with sandwich-type piezoelectric ceramic transducers | |
| CN101884985A (en) | Automatic frequency-hopping ultrasonic cleaner | |
| CN107377534B (en) | A transducer-based variable frequency vibration dust removal device | |
| Asemi et al. | Using a High frequency LC Resonant Inverter for Ultrasonic Cleaning Applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |