CN104785429A - Piezoelectric ultrasonic transducer with acoustic feedback function - Google Patents
Piezoelectric ultrasonic transducer with acoustic feedback function Download PDFInfo
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- CN104785429A CN104785429A CN201510056860.1A CN201510056860A CN104785429A CN 104785429 A CN104785429 A CN 104785429A CN 201510056860 A CN201510056860 A CN 201510056860A CN 104785429 A CN104785429 A CN 104785429A
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- ceramic element
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Abstract
The invention discloses a piezoelectric ultrasonic transducer with the acoustic feedback function. The piezoelectric ultrasonic transducer with the acoustic feedback function comprises pre-tightening-force screws, a middle pressing block, an emitting piezoelectric ceramic element and a front pressing block, wherein the middle pressing block and the front pressing block are arranged at the two ends of the emitting piezoelectric ceramic element, the other end of the middle pressing block is further provided with a detecting piezoelectric ceramic element with the structure totally consistent with that of the emitting piezoelectric ceramic element, the other end of the detecting piezoelectric ceramic element is further provided with a rear pressing block, and the front pressing block, the middle pressing block and the rear pressing block press the emitting piezoelectric ceramic element and the detecting piezoelectric ceramic element through the pre-tightening-force screws; the detecting piezoelectric ceramic element is connected with an ultrasonic power source detecting circuit through an electrode element. The detecting piezoelectric ceramic element is used for generating vibration with the frequency the same as that of vibration on the outlet of the ultrasonic transducer, the ultrasonic power source detecting circuit is used for detecting the vibration of the outlet of the ultrasonic transducer so that whether the ultrasonic transducer works at a resonant frequency with the maximum amplitude can be fast judged, the judgment method is simple, and operation is very easy.
Description
Technical field
The present invention relates to piezoelectric type ultrasonic transducer, relate to the technology of frequency tracking of ultrasonic transmitter, in particular, relate to a kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function.
Background technology
Transducer utilizes the device that the phenomenon of piezoelectricity of piezo-electric crystal (pottery) realizes electric energy, mechanical energy is exchanged.Ultrasonic transducer only when there is resonance, could outwards launch powerful ultrasonic wave.In resonant frequency range, the model of piezoelectric ceramic transducer can represent with the equivalent circuit of Fig. 2:
C
0for direct capacitance, be transducer when not vibration, two interelectrode capacitances, the dielectric constant of its size and piezoelectric ceramics (or crystal), length and width, thick relevant, the general order of magnitude is 10
-9f.R is the medium electrical loss in piezoelectric ceramic piece, usually can ignore its impact and (it is generally acknowledged R
0for infinity).
When transducer vibrations sends ultrasonic wave, also there is motional impedance, is produced the reaction of vibration by transducer itself and medium.When medium is air, it can be ignored to the reaction of vibration, and motional impedance can use resistance, electric capacity, and the series connection of inductance represents.The equivalent inductance of equivalent circuit when Lm, Cm, Rm represent that transducer is non-loaded respectively, equivalent capacity, equivalent resistance.Lm is equivalent to the inertia of wafer vibration, and the general order of magnitude is 10
-3h; Cm is equivalent to the elasticity of wafer vibration, and the general order of magnitude is 10
-12f; The general order of magnitude of frictional dissipation that Rm is equivalent to when wafer vibrates is Ω.
The resultant admittance of equivalent circuit of transducer is represented, Y with Y
0represent admittance,static and motional admittance with Ym, have:
Y=Y
0+ Y
m=G+jB is G wherein, and B is total conductance and total susceptance
Can prove:
wherein ω is for being added in pulsation on transducer electrode
In resonance frequency omega
cnear, can be similar to and think ω
cc
0=ω C
0, such transducer admittance is changed to the circle of shown in Fig. 3 with frequency.This figure can obtain many important parameters of transducer:
Fs---series resonance frequency, the resonant frequency (in admittance circle diagram 2 its maximum conductance place) of series arm in equivalent circuit of piezoelectric resonator
Fp---parallel resonance frequency, after equivalent circuit of piezoelectric resonator carries out connection in series-parallel equivalent transformation, the resonant frequency of parallel branch (in impedance circle diagram maximum resistance place, this description does not provide impedance circle diagram)
Fm---maximum admittance frequency, frequency when piezoelectric vibrator admittance is maximum is called maximum admittance frequency
Fn---minimum addittance frequency, frequency when piezoelectric vibrator admittance is minimum is called maximum admittance frequency
Fr---resonant frequency, makes the susceptance of piezoelectric vibrator be that a frequency lower in a pair frequency of zero is called resonant frequency
Fa---anti-resonance frequency, makes the susceptance of piezoelectric vibrator be a frequency higher in a pair frequency of zero
When transducer is unloaded, there is following relation in six characteristic frequencies: f
m=f
s=f
r, f
a=f
p=f
n
Have after loading: f
m<f
s<f
r, f
a<f
p<f
n, f
s<f
p
In these 6 characteristic frequencies, maximum admittance frequency fm and minimum addittance frequency fn can record by Transmission line method, and resonant frequency fr and anti-resonance frequency fa can draw by observing the same phase point of resonance point and electric current and voltage waveform.
Only have series resonance frequency fs and parallel resonance frequency fp directly cannot measure by simple method, and these two frequencies calculate, have important effect in performance evaluation and impedance matching in the parameter of transducer.
Supersonic wave cleaning machine is operated in transducer series resonance frequency more, can improve the power stage of ultrasonic-frequency power supply.
Transducer is operated in parallel resonance frequency, and its power output can regulate automatically according to loading condition, is suitable for ultra-sonic welded and pulverizing.
Should near series resonance frequency with the ultrasonic system resonant frequency of series resonance frequency work, should near parallel resonance frequency with the ultrasonic system resonant frequency of parallel resonance frequency work.
The technology of frequency tracking of ultrasonic power, adopt electric feedback transmitter, when resonant frequency is because of the reasons such as load change, transducer are aging drift, after gathering coupling inductance counteracting transducer capacitive, the voltage and current of transducer system, according to its phase difference, change ultrasonic frequency, to reach the object be positioned near resonant frequency.
The present invention adopts acoustic feedback, invents a kind of transducer having both acoustic emission and accept function, directly adopts the signal that mechanical oscillation produce, allows ultrasonic frequency be positioned at transducer peak swing frequency.
Summary of the invention
The object of the invention is to solve mechanical resonant frequency in prior art and gather inconvenient problem, provide one and judge that Oscillation Amplitude signal is simple, and can judge whether transducer is operated in a kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function of the maximum resonant frequency of amplitude.
To achieve these goals, the technical solution used in the present invention is:
A kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function, comprise pretightning force screw, intermediate pressing block, transmitting piezoelectric ceramic element and front briquetting, described intermediate pressing block and front briquetting are located at the two ends of transmitting piezoelectric ceramic element, the described intermediate pressing block other end is also provided with and constructs on all four detection piezo ceramic element with above-mentioned transmitting piezoelectric ceramic element, described intermediate pressing block and front briquetting size shape completely the same, the other end of described detection piezo ceramic element is also provided with rear briquetting, described front briquetting, transmitting piezoelectric ceramic element and detection piezo ceramic element are compressed by pretightning force screw by intermediate pressing block and rear briquetting, described transmitting piezoelectric ceramic element and detection piezo ceramic element are respectively equipped with electrode member, and the electrode member on described detection piezo ceramic element connects the ultrasonic power testing circuit for detecting ultrasonic amplitude.Transmitting piezoelectric ceramic element is the piezoelectric adopting parameter identical with detecting piezo ceramic element, wherein transmitting piezoelectric ceramic element is used for receiving ultrasonic power drive singal, to produce vibration, detect piezo ceramic element to be used for bearing vibration, produce signal, and utilize the signal produced to be detected by ultrasonic power testing circuit, to judge whether above-mentioned ultrasonic transducer is operated in the maximum resonant frequency of amplitude.
Further, the electrode member on described transmitting piezoelectric ceramic element connects ultrasonic power drive singal, produces vibration for transmitting piezoelectric ceramic element.
Further, described intermediate pressing block is that length is ultrasonic wave wavelength half and the briquetting be made up of metal material.The piezoelectric material vibration amplitude of generation signal can be made like this close to maximum, improve sensitivity.
Before, during and after piezoelectric is clipped between briquetting, by bolt presses, to ensure that piezoelectric is operated in pressured state, avoid tension broken.
Compared with prior art, advantage of the present invention is as follows: the present invention is simple and compact for structure, and production cost is low; The detection piezo ceramic element being located at the intermediate pressing block other end is utilized to produce the vibration identical with ultrasonic transducer exit vibration frequency, and by ultrasonic power testing circuit, its vibration is detected, to realize the quick judgement whether ultrasonic transducer is operated in the maximum resonant frequency of amplitude, its determination methods simply and very easily operate.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation with the piezoelectric-type ultrasonic wave transducer of acoustic feedback function of the present invention.
Fig. 2 is the equivalent circuit diagram of transducer in prior art.
Fig. 3 is the dmittance chart of transducer in prior art.
In figure, briquetting before 1-, 2-transmitting piezoelectric ceramic element, 3-intermediate pressing block, 4-detect briquetting, 6-pretightning force screw after piezo ceramic element, 5-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function, comprise pretightning force screw 6, intermediate pressing block 3, transmitting piezoelectric ceramic element 2 and front briquetting 1, described intermediate pressing block 3 and front briquetting 1 are located at the two ends of transmitting piezoelectric ceramic element 2, described intermediate pressing block 3 other end is also provided with and constructs on all four detection piezo ceramic element 4 with above-mentioned transmitting piezoelectric ceramic element 2, described intermediate pressing block 3 and front briquetting 1 size shape completely the same, the other end of described detection piezo ceramic element 4 is also provided with rear briquetting 5, described front briquetting 1, transmitting piezoelectric ceramic element 2 and detection piezo ceramic element 4 are compressed by pretightning force screw 6 by intermediate pressing block 3 and rear briquetting 5, described transmitting piezoelectric ceramic element 2 and detection piezo ceramic element 4 are respectively equipped with electrode member, and the electrode member on described detection piezo ceramic element 4 connects the ultrasonic power testing circuit for detecting ultrasonic amplitude.Transmitting piezoelectric ceramic element 2 is the piezoelectric adopting parameter identical with detecting piezo ceramic element 4, wherein transmitting piezoelectric ceramic element 2 is used for receiving ultrasonic power drive singal, to produce vibration, detect piezo ceramic element 4 to be used for bearing vibration, produce signal, and utilize the signal produced to be detected by ultrasonic power testing circuit, to judge whether above-mentioned ultrasonic transducer is operated in the maximum resonant frequency of amplitude.
Electrode member on described transmitting piezoelectric ceramic element connects ultrasonic power drive singal, produces vibration for transmitting piezoelectric ceramic element.
Described intermediate pressing block is that length is ultrasonic wave wavelength half and the briquetting be made up of metal material.The piezoelectric material vibration amplitude of generation signal can be made like this close to maximum, improve sensitivity.
Before, during and after piezoelectric is clipped between briquetting, by bolt presses, to ensure that piezoelectric is operated in pressured state, avoid tension broken.
Vibrative transmitting piezoelectric ceramic element connects ultrasonic power drive singal, i.e. ultrasonic-frequency power supply produces ultrasonic mechanical vibration under pumping signal effect, and these mechanical oscillation are to the two ends radiation of transmitting piezoelectric ceramic element; Its forward end radiant section to external radiation, completes the function of liquid ultrasonic cavitation by front briquetting; Radiant section drives the detection piezo ceramic element bearing vibration by intermediate pressing block to the back-end, detect the signal of telecommunication that piezo ceramic element produces reaction Oscillation Amplitude, output to ultrasonic power testing circuit to detect, and utilize its testing result to carry out FEEDBACK CONTROL to ultrasonic power drive singal, realize the peak swing location of ultrasonic power drive singal.Intermediate pressing block length is half-wavelength, and when its objective is acoustic reflection, stackable formation standing wave, makes metal platen left and right both ends of the surface Oscillation Amplitude close to maximum, and the signal of telecommunication detecting piezo ceramic element output, close to maximum, improves sensitivity.
Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of patent of the present invention.
Claims (3)
1. one kind has the piezoelectric-type ultrasonic wave transducer of acoustic feedback function, comprise pretightning force screw (6), intermediate pressing block (3), transmitting piezoelectric ceramic element (2) and front briquetting (1), described intermediate pressing block (3) and front briquetting (1) are located at the two ends of transmitting piezoelectric ceramic element (2), it is characterized in that: described intermediate pressing block (3) other end is also provided with and constructs on all four detection piezo ceramic element (4) with above-mentioned transmitting piezoelectric ceramic element (2), described intermediate pressing block (3) and front briquetting (1) size shape completely the same, the other end of described detection piezo ceramic element (4) is also provided with rear briquetting (5), described front briquetting (1), transmitting piezoelectric ceramic element (2) and detection piezo ceramic element (4) are compressed by pretightning force screw (6) by intermediate pressing block (3) and rear briquetting (5), described transmitting piezoelectric ceramic element (2) and detection piezo ceramic element (4) are respectively equipped with electrode member, and the electrode member on described detection piezo ceramic element (4) connects the ultrasonic power testing circuit for detecting ultrasonic amplitude.
2. a kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function according to claim 1, it is characterized in that: the electrode member on described transmitting piezoelectric ceramic element (2) connects ultrasonic power drive singal, produce vibration for transmitting piezoelectric ceramic element (2).
3. a kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function according to claim 1, is characterized in that: described intermediate pressing block (3) is ultrasonic wave wavelength half for length and the briquetting be made up of metal material.
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|---|---|---|---|
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|---|---|---|---|
| CN201510056860.1A CN104785429B (en) | 2015-02-03 | 2015-02-03 | Piezoelectric ultrasonic transducer with acoustic feedback function |
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| CN104785429B CN104785429B (en) | 2017-01-11 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080821A (en) * | 2015-08-19 | 2015-11-25 | 杭州成功超声设备有限公司 | Ultrasonic transducer with quantitative amplitude feedback system |
| CN106209011A (en) * | 2016-08-01 | 2016-12-07 | 陕西师范大学 | Acoustic impedance match device and method based on piezoelectric effect |
| CN106533249A (en) * | 2016-12-05 | 2017-03-22 | 同济大学 | Online miniature vibration table |
| CN107191442A (en) * | 2017-05-26 | 2017-09-22 | 北京顺风光热科技有限公司 | It is a kind of that the method and device of high-speed object air drag is reduced based on power ultrasonic |
| CN107694892A (en) * | 2017-11-17 | 2018-02-16 | 杭州成功超声设备有限公司 | A kind of bar type ultrasonic system structure of super high power |
| WO2019099158A1 (en) * | 2017-11-15 | 2019-05-23 | Branson Ultrasonics Corporation | Method and apparatus for detection of loose stack joints and cracked components of ultrasonic stacks |
| CN109909533A (en) * | 2019-04-22 | 2019-06-21 | 上海应用技术大学 | A kind of intelligence longitudinal-torsional composite ultrasonic milling attachment |
| CN111480345A (en) * | 2017-12-14 | 2020-07-31 | 弗洛设计声能学公司 | Acoustic transducer driver and controller |
| CN113019870A (en) * | 2019-12-24 | 2021-06-25 | 深圳开立生物医疗科技股份有限公司 | Method and device for tracking resonant frequency of ultrasonic transducer and related equipment |
| CN117506109A (en) * | 2023-12-22 | 2024-02-06 | 广东工程职业技术学院 | Method for improving welding power and stability of digital ultrasonic welding power supply |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7004016B1 (en) * | 1996-09-24 | 2006-02-28 | Puskas William L | Probe system for ultrasonic processing tank |
| US20120139850A1 (en) * | 2010-12-07 | 2012-06-07 | Samsung Electro-Mechanics Co., Ltd. | Haptic driving assembly and electronic device using the same |
| CN102741665A (en) * | 2010-01-06 | 2012-10-17 | 丹尼尔测量和控制公司 | Ultrasonic flow meter and transducer assembly with isolated transformer capsule |
| CN202855401U (en) * | 2012-09-20 | 2013-04-03 | 张家港睿能科技有限公司 | Cable and ultrasonic vibration device using cable |
| CN204523451U (en) * | 2015-02-03 | 2015-08-05 | 浙江工业大学 | A kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function |
-
2015
- 2015-02-03 CN CN201510056860.1A patent/CN104785429B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7004016B1 (en) * | 1996-09-24 | 2006-02-28 | Puskas William L | Probe system for ultrasonic processing tank |
| CN102741665A (en) * | 2010-01-06 | 2012-10-17 | 丹尼尔测量和控制公司 | Ultrasonic flow meter and transducer assembly with isolated transformer capsule |
| US20120139850A1 (en) * | 2010-12-07 | 2012-06-07 | Samsung Electro-Mechanics Co., Ltd. | Haptic driving assembly and electronic device using the same |
| CN202855401U (en) * | 2012-09-20 | 2013-04-03 | 张家港睿能科技有限公司 | Cable and ultrasonic vibration device using cable |
| CN204523451U (en) * | 2015-02-03 | 2015-08-05 | 浙江工业大学 | A kind of piezoelectric-type ultrasonic wave transducer with acoustic feedback function |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080821A (en) * | 2015-08-19 | 2015-11-25 | 杭州成功超声设备有限公司 | Ultrasonic transducer with quantitative amplitude feedback system |
| CN106209011A (en) * | 2016-08-01 | 2016-12-07 | 陕西师范大学 | Acoustic impedance match device and method based on piezoelectric effect |
| CN106533249A (en) * | 2016-12-05 | 2017-03-22 | 同济大学 | Online miniature vibration table |
| CN107191442A (en) * | 2017-05-26 | 2017-09-22 | 北京顺风光热科技有限公司 | It is a kind of that the method and device of high-speed object air drag is reduced based on power ultrasonic |
| CN107191442B (en) * | 2017-05-26 | 2023-11-03 | 哈尔滨龙声超声技术有限公司 | Method and device for reducing air resistance of high-speed object based on power ultrasound |
| WO2019099158A1 (en) * | 2017-11-15 | 2019-05-23 | Branson Ultrasonics Corporation | Method and apparatus for detection of loose stack joints and cracked components of ultrasonic stacks |
| CN107694892A (en) * | 2017-11-17 | 2018-02-16 | 杭州成功超声设备有限公司 | A kind of bar type ultrasonic system structure of super high power |
| CN111480345B (en) * | 2017-12-14 | 2022-04-29 | 弗洛设计声能学公司 | Acoustophoretic system, method for operating acoustophoretic system, and method for controlling acoustic transducer and acoustic system |
| CN111480345A (en) * | 2017-12-14 | 2020-07-31 | 弗洛设计声能学公司 | Acoustic transducer driver and controller |
| US11381922B2 (en) | 2017-12-14 | 2022-07-05 | Flodesign Sonics, Inc. | Acoustic transducer driver and controller |
| CN109909533A (en) * | 2019-04-22 | 2019-06-21 | 上海应用技术大学 | A kind of intelligence longitudinal-torsional composite ultrasonic milling attachment |
| CN113019870A (en) * | 2019-12-24 | 2021-06-25 | 深圳开立生物医疗科技股份有限公司 | Method and device for tracking resonant frequency of ultrasonic transducer and related equipment |
| CN117506109A (en) * | 2023-12-22 | 2024-02-06 | 广东工程职业技术学院 | Method for improving welding power and stability of digital ultrasonic welding power supply |
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