CN1151850C - Acoustic radiation plate of dual-frequency ultrasonic radiator - Google Patents
Acoustic radiation plate of dual-frequency ultrasonic radiator Download PDFInfo
- Publication number
- CN1151850C CN1151850C CNB001153846A CN00115384A CN1151850C CN 1151850 C CN1151850 C CN 1151850C CN B001153846 A CNB001153846 A CN B001153846A CN 00115384 A CN00115384 A CN 00115384A CN 1151850 C CN1151850 C CN 1151850C
- Authority
- CN
- China
- Prior art keywords
- acoustic radiation
- frequency
- radiation plate
- dual
- ultrasonic radiator
- 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.)
- Expired - Fee Related
Links
Landscapes
- Transducers For Ultrasonic Waves (AREA)
Abstract
The present invention relates to an acoustic radiation plate of a dual-frequency ultrasonic radiator. The thickness of the acoustic radiation plate is 1.5 times the length of the wavelength of the base frequency or is 5 times the length of the wavelength of the first overtone frequency.
Description
Technical field
What the present invention relates to is a kind of acoustic radiation plate of dual-frequency ultrasonic radiator.Belong to the medical apparatus professional field.
Background technology
Traditional power ultrasonic physical therapy ultrasonic transducer in the technical background; in order to obtain higher emission effciency, protect piezoelectric vibrator to avoid the erosion of medium and to provide mechanical support so that install for oscillator; usually adopt the metallic plate of 1/2nd wavelength integral multiple thickness (n λ/2) to make the acoustic radiation plate, the ultrasonic energy that piezoelectric vibrator is launched is delivered in the medium effectively and goes.This has become the general knowledge of ultrasound transducer design, as: the similar techniques file of Huo Deing by retrieval:
1、PNT?Wells，Biomedical?Ultrasonics，Academic?Press，p471，1977。
2, Guo Zhiying, Yu Shixun, Gao Zhenling, Yang Guiqi, ultrasonic therapeutic, Shaanxi science tech publishing house, p22 1983.
The technology that above-mentioned file relates to all is applicable to the single-frequency ultrasonic radiator, still finds no the reported in literature that is applicable to the acoustic radiation plate of dual-frequency ultrasonic radiator aspect simultaneously so far.
Summary of the invention
The objective of the invention is to overcome the deficiency in the technical background, propose a kind of following acoustic radiation plate of dual-frequency ultrasonic radiator that can both realize high-power emission of excitation that is applicable to fundamental resonance frequency and first overtone frequency simultaneously.
Technical scheme of the present invention is as follows: plate non-focusing type or bowl type focus type piezoelectric ceramic transducer oscillator have a plurality of resonant frequencies (fundamental frequency f
0With overtone frequency f
3, f
5, f
7...) and characteristic, can make it be operated in fundamental frequency f
0With the first overtone frequency f
3, calculate the half wavelength lambda of acoustic radiation panel material under these two frequencies
0/ 2 and λ
3/ 2 least common multiple as the thickness of the acoustic radiation plate of this transducer, can be designed to be applicable to the sound disc of two kinds of operating frequencies.In its thickness resonant frequency of emission type PZT potsherd, the first overtone frequency f
3Be about its fundamental frequency f
03.3～3.4 times, the ratio of corresponding wavelength is about the ratio λ of two positive integers
3: λ
0=3: 10, promptly
Use this relation, design acoustic radiation plate thickness equals 1.5 times of fundamental frequency wavelength or first overtone frequency wavelength 5 times, just can satisfy the two-frequency operation condition, realizes the purpose of the high-power ultrasound wave of high power double frequency emission down.According to the acoustic transducer theory, the acoustic radiation plate of the integral multiple thickness of 1/2nd wavelength when adopting fundamental frequency work when the long λ of 1/2nd sound waves/2 integral multiples or the work of first overtone frequency can equivalently transform to the acoustic impedance of medium one side of transducer oscillator.Make transducer under constant pressure source drives, very high acoustic radiation power be arranged.The present invention is ingenious to utilize the emission type piezoelectric ceramics
Feature, try to achieve λ
0/ 2 and λ
3/ 2 least common multiple is
The time, can under two kinds of operating frequencies, can both satisfy n λ/2 conditions.
The present invention has very significant effect and substantial progress, and the present invention not only is applicable to non-focusing type ultrasonic radiator, and is applicable to the focus type ultrasonic radiator; Can work in fundamental frequency f
0Can work in the first overtone frequency f again
3, carry out the large power supersonic emission; In ultrasonic operating frequency is f
0And/or f
3Condition under, all can obtain higher electroacoustic efficiency, electroacoustic efficiency can reach more than 60%.
Description of drawings
Describe in further detail below in conjunction with accompanying drawing:
The plate acoustic radiation plate of Fig. 1 the present invention sketch map
Fig. 2 bowl type of the present invention acoustic radiation plate sketch map
The specific embodiment
As shown in Figure 1 and Figure 2, plate non-focusing type or bowl type focus type piezoelectric ceramic transducer oscillator have a plurality of resonant frequencies (fundamental frequency f
0With overtone frequency f
3, f
5, f
7...) and characteristic, can make it be operated in fundamental frequency f
0With the first overtone frequency f
3, calculate the half wavelength lambda of acoustic radiation panel material under these two frequencies
0/ 2 and λ
3/ 2 least common multiple, thickness as the acoustic radiation plate of this transducer, the acoustic radiation plate thickness equals 1.5 times of fundamental frequency wavelength or first overtone frequency wavelength 5 times, just can satisfy the two-frequency operation condition, realizes the purpose of the high-power emission of high power double frequency down ultrasound wave.
Claims (1)
1, a kind of acoustic radiation plate of dual-frequency ultrasonic radiator is characterized in that the acoustic radiation plate thickness equals 5 times of first overtone frequency wavelength of 1.5 times of the fundamental frequency wavelength of thickness vibration piezoelectric vibrator or thickness vibration piezoelectric vibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001153846A CN1151850C (en) | 2000-04-13 | 2000-04-13 | Acoustic radiation plate of dual-frequency ultrasonic radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001153846A CN1151850C (en) | 2000-04-13 | 2000-04-13 | Acoustic radiation plate of dual-frequency ultrasonic radiator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1266726A CN1266726A (en) | 2000-09-20 |
| CN1151850C true CN1151850C (en) | 2004-06-02 |
Family
ID=4584838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001153846A Expired - Fee Related CN1151850C (en) | 2000-04-13 | 2000-04-13 | Acoustic radiation plate of dual-frequency ultrasonic radiator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151850C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438941C (en) * | 2004-06-17 | 2008-12-03 | 上海交通大学 | Ultrasonic heat treatment system for mouth cavity and maxillofacial malignant tumor |
| JP4274248B2 (en) * | 2007-01-15 | 2009-06-03 | パナソニック電工株式会社 | Ultrasonic generator and skin care device using the same |
-
2000
- 2000-04-13 CN CNB001153846A patent/CN1151850C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1266726A (en) | 2000-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9610617B2 (en) | Megasonic multifrequency apparatus with matched transducer | |
| JP2010530800A (en) | Multi-frequency ultrasonic equipment and processing for biofuel production | |
| CN112871613A (en) | Piezoelectric micromachined ultrasonic transducer with support posts | |
| CN1151850C (en) | Acoustic radiation plate of dual-frequency ultrasonic radiator | |
| CN101748895A (en) | Concrete vibrator utilizing ultrasonic vibration and method thereof | |
| Wevers et al. | Low-frequency ultrasonic piezoceramic sandwich transducer | |
| TW449486B (en) | Composite ultrasonic therapeutic energy converter and method for making the same | |
| JP2005500725A5 (en) | ||
| JPS6053117A (en) | Kitchen sink unit | |
| CN201627376U (en) | Concrete vibration device using ultrasonic vibration | |
| CN202290529U (en) | Random phase shift frequency-mixing type piezoelectric vibrator combined ultrasonic transducer device | |
| JPH07111200B2 (en) | Fluid drive method by ultrasonic wave | |
| CN2829913Y (en) | Supersonic processor | |
| Suzuki et al. | Characteristics of ultrasonic linear motor that incorporates two transducers at an acute angle | |
| Weekers et al. | Electrode design for efficient excitation of vibrational modes in an AlN based PMUT | |
| CN219738536U (en) | Sound absorption structure of acousto-optic device | |
| JP2004312394A (en) | Parametric speaker and electroacoustic transducer therefor | |
| CN219738532U (en) | Reflection type sound absorption structure of acousto-optic device | |
| Liu et al. | Research on a Multimode Wideband Tonpilz Transducer | |
| JPH0832110B2 (en) | Ultrasonic probe | |
| ZHANG et al. | A low frequency high-power PMNT flextensional transducer | |
| Liu et al. | Study on Driving Methods of Magnetostrictive/Piezoelectric Hybrid Janus-Helmholtz Transducer | |
| JPH04150981A (en) | Ultrasonic washing apparatus | |
| WO2023163651A2 (en) | Acoustic transducer and method of forming the same | |
| Khmelev et al. | Transducers of High Intensity for Gas Media |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |