CN87204016U - Ultrasonic wave energy converter for air - Google Patents
Ultrasonic wave energy converter for air Download PDFInfo
- Publication number
- CN87204016U CN87204016U CN 87204016 CN87204016U CN87204016U CN 87204016 U CN87204016 U CN 87204016U CN 87204016 CN87204016 CN 87204016 CN 87204016 U CN87204016 U CN 87204016U CN 87204016 U CN87204016 U CN 87204016U
- Authority
- CN
- China
- Prior art keywords
- transducer
- packing ring
- impedance matching
- ultrasonic wave
- energy converter
- 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.)
- Withdrawn
Links
Images
Abstract
The utility model discloses an ultrasonic wave energy converter whose working frequency can be adjusted. Since in front of a vibrator radiation surface, an impedance matching board with a plurality of sound transparency holes is provided with a gap, the acoustic impedance of the loaded medium, which is reflected on the vibrator radiation surface by a cavity resonator formed by the sound transparency holes, and the gap between the impedance matching board and the vibrator radiation surface is raised substantially, even if the radiation efficiency of the energy converter or the receiving sensitivity is increased. The utility model has the advantages of simple structure, easy manufacturing and low cost and is mainly suitable for an ultrasonic wave detection device in air.
Description
The utility model relates to a kind of adjustable ultrasonic transducer that has the impedance matching plate.
The existing ultrasonic transducer that uses in air is because the characteristic impedance of its characteristic impedance and air differs greatly, thereby transducer can only be radiated minimum part energy in the air and go, and causes the radiation efficiency of transducer or receiving sensitivity very low.
In addition, because existing ultrasonic transducer is monolithic construction, its resonance frequency is non-adjustable, and therefore, not only processing difficulties, consistency are poor, and volume is big, the cost height.
The purpose of this utility model is: provides a kind of operating frequency adjustable combined type ultrasonic transducer, makes it to be complementary with the low characteristic impedance of air, thus the radiation efficiency or the receiving sensitivity of raising transducer.
Main points of the present utility model are that an impedance matching plate that has some sound penetrating holes has been installed with a gap in the front of transducer oscillator radiating surface.When transducer was worked, the gap between some sound penetrating holes on the transducer matching disc and matching disc and the oscillator radiating surface promptly constituted a cavity with a certain resonance frequency.Distance dependent on the resonance frequency of this cavity and the thickness of matching disc, the matching disc between sound penetrating hole aperture and quantity and matching disc and the oscillator radiating surface.Adjust above parameter, the load medium also changes by the acoustic impedance that cavity is reflected on the oscillator radiating surface thereupon, when parameter is selected when suitable, the load medium just increases substantially by the acoustic impedance that cavity is reflected on the oscillator radiating surface, thereby has improved the match condition of oscillator and load medium.
Below in conjunction with accompanying drawing the utility model is elaborated:
Fig. 1 is a structural representation of the present utility model.
Wherein: 1-transducer lid 2,4,6-packing ring
3-impedance matching plate 5-oscillating plate
7-transducer holder 8-piezoelectric ceramic piece
9-holding wire 10-weld tabs
11-screw 12-sound penetrating hole
Referring to accompanying drawing, closed assembly has packing ring (6), oscillating plate (5), packing ring (4), impedance matching plate (3) and packing ring (2) successively in the step annular groove of transducer holder (7), and is fixed by the transducer lid (1) that is threaded with transducer holder (7).Holding wire weld tabs (10) is pressed abd fixed on the transducer holder (7) with screw (11).Piezoelectric ceramic (8) is bonded in oscillating plate (5) central authorities with conducting resinl.
Operating frequency of the present utility model can be adjusted within the specific limits by the internal diameter that changes packing ring (2) (4) (6).
Transducer lid (1), packing ring (2) (4) (6) in the utility model, impedance matching plate (3), oscillating plate (5), transducer holder (7) all adopt the metal material manufacturing.
The utility model has been owing to taked abovementioned technology, thus have simple in structure, processing and debugging is easy, with low cost, radiation efficiency or the high characteristics of receiving sensitivity, the ultrasonic detecting equipment that mainly is suitable for using in air uses.
Embodiment:
By above stated specification and accompanying drawing, transducer lid (1), transducer holder (7), impedance matching plate (3), oscillating plate (5) adopt common iron to make; Packing ring (2) (4) (6) adopts copper material to make; Piezoelectric ceramic piece (8) adopts conducting resinl to be bonded in the central authorities of oscillating plate (5), and erection welding gets final product well.
Claims (3)
1, a kind of ultrasonic transducer of being made up of transducer lid (1), packing ring (2) (4) (6), oscillating plate (5), transducer holder (7), piezoelectric ceramic (8), weld tabs (11), screw (12) etc. is characterized in that being equipped with a gap in the front of transducer oscillator radiating surface an impedance matching plate (3) that has some sound penetrating holes.
2, ultrasonic transducer as claimed in claim 1, it is characterized in that in the step annular groove of transducer holder (7) closed assembly has packing ring (6), oscillating plate (5), packing ring (4), impedance matching plate (3), packing ring (2) successively, and be fixed by the transducer lid (1) that is threaded with transducer holder (7).
3, ultrasonic transducer as claimed in claim 1 or 2 is characterized in that transducer lid (1), packing ring (2) (4) (6), impedance matching plate (3), oscillating plate (5), transducer holder (7) all adopt the metal material manufacturing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87204016 CN87204016U (en) | 1987-03-19 | 1987-03-19 | Ultrasonic wave energy converter for air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87204016 CN87204016U (en) | 1987-03-19 | 1987-03-19 | Ultrasonic wave energy converter for air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87204016U true CN87204016U (en) | 1988-01-20 |
Family
ID=4819942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87204016 Withdrawn CN87204016U (en) | 1987-03-19 | 1987-03-19 | Ultrasonic wave energy converter for air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87204016U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319654C (en) * | 2005-01-08 | 2007-06-06 | 戴露雯 | Ultrasonic treatment device |
| CN100389890C (en) * | 2005-02-07 | 2008-05-28 | 北京大学 | Transducer array and production thereof |
| CN105170574A (en) * | 2015-09-22 | 2015-12-23 | 桂林市鑫隆机电工程有限责任公司 | Dust-free equipment cleaning device |
-
1987
- 1987-03-19 CN CN 87204016 patent/CN87204016U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319654C (en) * | 2005-01-08 | 2007-06-06 | 戴露雯 | Ultrasonic treatment device |
| CN100389890C (en) * | 2005-02-07 | 2008-05-28 | 北京大学 | Transducer array and production thereof |
| CN105170574A (en) * | 2015-09-22 | 2015-12-23 | 桂林市鑫隆机电工程有限责任公司 | Dust-free equipment cleaning device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105958956B (en) | A kind of thin film bulk acoustic wave resonator and preparation method thereof | |
| CN87204016U (en) | Ultrasonic wave energy converter for air | |
| CN207531080U (en) | Mems microphone | |
| CN111179892B (en) | High sound pressure level piezoelectric buzzer | |
| CN109225788B (en) | High-efficiency broadband air-medium ultrasonic transducer with double-phonon crystal composite structure | |
| CN111953231B (en) | Adjustable frequency acoustic energy acquisition device based on phonon crystal | |
| CN201815461U (en) | Ultrasonic transducer | |
| CN219475826U (en) | Ultrasonic sensor structure aiming at resonance influence | |
| CN2045345U (en) | Ultrasonic vibration cutting device | |
| CN219981445U (en) | Multi-frequency ultrasonic sensor | |
| CN212779542U (en) | Capacitive ultrasonic sensor | |
| CN215865478U (en) | High-frequency high-sound-intensity sound field testing hydrophone | |
| CN1186628C (en) | External adhesive composite wide band transducer | |
| CN218121167U (en) | Open type ultrasonic sensor | |
| CN216672877U (en) | Piezoelectric ultrasonic vibrator based on bending vibration mode | |
| CN220346417U (en) | 2-2 composite structure ultrasonic transducer | |
| CN220836469U (en) | Ultrasonic transducer chip packaging structure and electronic equipment | |
| CN2242200Y (en) | Acoustic device for vehicle with excellent directing property and low noise | |
| JPH071920Y2 (en) | Ultrasonic transducer | |
| CN216133968U (en) | Intelligent communication equipment based on signal expansion antenna | |
| CN201570042U (en) | Anti-counterfeiting brand speech true and false recognition apparatus | |
| CN85102564A (en) | A kind of electron horn with low noise | |
| CN2360888Y (en) | Shock-proof guarding warner | |
| CN2185444Y (en) | High-frequency triggering hammering switch for seismometer | |
| JPH0424718Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |