CN2459632Y - Ultrasonic wave transducer - Google Patents
Ultrasonic wave transducer Download PDFInfo
- Publication number
- CN2459632Y CN2459632Y CN 00261518 CN00261518U CN2459632Y CN 2459632 Y CN2459632 Y CN 2459632Y CN 00261518 CN00261518 CN 00261518 CN 00261518 U CN00261518 U CN 00261518U CN 2459632 Y CN2459632 Y CN 2459632Y
- Authority
- CN
- China
- Prior art keywords
- acoustic impedance
- utility
- model
- ultrasonic transducer
- impedance matching
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 239000002033 PVDF binder Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003260 anti-sepsis Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Landscapes
- Transducers For Ultrasonic Waves (AREA)
Abstract
The utility model relates to an ultrasonic transducer, which is characterized in that an acoustic impedance matching part which is bonded with a vibrator of the ordinary sandwich vibrator type (piston type) ultrasonic transducer is a layered structure which is formed by the superposition of a radiation film, an acoustic impedance matching material, and a sun-resistance matching metal plate through a bonding mode. The utility model is a high-power ultrasonic transducer with air distance detection, and has the advantages that the electromechanical conversion efficiency is very high, a blind area is very small, and the detection distance is far. The utility model also has the advantages of simple process, low cost, and wide practicality.
Description
The utility model belongs to the non-contact type article position measuring technology, or rather, is a kind of high-power air range finding ultrasonic transducer.
Ultrasonic transducer is to apply and electric signal certain amplitude identical with its mechanical resonant frequency thereon, and transducer just by the resonance frequency vibration, is launched sound wave simultaneously in air, and sound wave is run into to return behind the testee and received by this transducer and converted electric signal to.The time interval between signal that sends on the transducer and the echoed signal that receives is directly proportional with the distance of transducer to body surface.The transducer architecture of similar products at home and abroad generally is that the impedance matching of sandwich oscillator harmony partly combines at present, and the form of sandwich oscillator is substantially the same, and acoustic impedance compatible portion material major part is based on rigid plastic and foamed material.Though this transducer can improve electromechanical conversion efficiency is increased, most energy has only the sub-fraction power transfer in air directly from matching layer reflected back transducer.Because energy reflection makes that the blind area of ultrasonic transducer can be very big, measurement range reduces, and just the blind area of saying usually is big, surveys not far.Because the present plastics and the anti-corrosive properties of foamed material are poor, so transducer can not be used for the place of seriously corroded.Although the shell that some transducers adopts PVDF (Kynoar) and PTFE (teflon) to make transducer plays antisepsis, owing to the acoustic impedance high (with the air-borne sound impedance ratio) of PVDF and PTFE, according to impedance matching principle: Z=(Z
1* Z
2)
1/2(Z in the formula
1Be transducer oscillator acoustic impedance, Z
2Be the air-borne sound impedance, Z is the matching materials acoustic impedance) as can be known, the transducer range finding of making shell of PVDF and PTFE can be not far away.According to the acoustic impedance matching principle as can be known, the performance quality of transducer, acoustic impedance coupling play a decisive role, and that is to say, find as much as possible or develop a kind of material, make acoustic impedance Z equal Z
1Take advantage of Z
2Evolution, the blind area is little to make, range finding ultrasonic transducer far away.
The purpose of this utility model is the shortcoming that overcomes prior art, provide a kind of simple in structure, the blind area is little, range finding is far away and the high-power air of corrosion-resistant range finding ultrasonic transducer.
Main technical schemes of the present utility model: the acoustic impedance coupling adopts the gradual change method promptly repeatedly to mate, and uses acoustic impedance acoustic impedance matching materials from high to low, mates with the air-borne sound phase of impedance, to reach the purpose that the blind area is little, range finding is far away.
The utility model ultrasonic transducer is made up of sandwich oscillator harmony impedance matching part.
The structure of sandwich oscillator described in the utility model is known, is to be made of radiation piece, piezoelectric ceramics, pole piece, match block parts, and its shape comprises column type, notch cuttype, symmetric form, asymmetric, horseshoe type.
Acoustic reactance compatible portion described in the utility model is the important improvement of ultrasonic transducer of the present utility model, it is that acoustic impedance is followed successively by impedance matching sheet metal, acoustic impedance matching materials, the radiation film bonding with the radiation piece of sandwich oscillator from high to low, by the bonding layer structure that is superimposed as.
The bonding agent of described bonding usefulness is the known bonding agent that common polymeric bonding material is used.
Described radiation film has been the effect of acoustic resistance coupling and protection, and its used material comprises polyester (PET), polytetrafluoroethylene (PTFE) or plastic film material.Described PET material, thickness are that 0.1～0.01mm, density are 0.5～1.5g/cm
3, described PTFE material, thickness are that 0.1～0.01mm, density are 0.5～2.5g/cm
3, described PVDF material thickness is that 0.1～0.01mm, density are 0.5～1.8g/cm
3, described plastic sheeting comprises tygon, polypropylene, polyvinyl chloride plastic film, its thickness is that 0.1～0.01mm, density are 0.5～1.2g/cm
3
Described acoustic impedance matching materials comprises high pressure isocyanurate foam and tygon, polypropylene, polyvinyl chloride foam, and their thickness is that 1/4 wavelength, the density of transducer frequency of operation is 0.05～0.2g/cm
3
Described impedance matching sheet metal comprises steel, aluminium, titanium, magnesium and alloying metal plate, and its thickness is 0.5～4mm.
The size of the stratified material of described acoustic impedance compatible portion greater than, be equal to or less than the size of the radiation piece surface of contact of the sandwich oscillator that combines with it.
Major advantage of the present utility model: the utility model is because the acoustic impedance compatible portion is used the repeatedly gradual change method principle of coupling, adopt three kinds of different materials to be superimposed as acoustic impedance layer structure from high to low, mate with the air-borne sound phase of impedance, the electromechanical conversion efficiency that can guarantee transducer of the present utility model reaches 70～80%, the blind area is very little, detection range reaches 80～100 meters, improves nearly one times than like product, is better than similar products at home and abroad on performance and price; And the utility model technology is simple, and practicality is wide.
Further specify design feature of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is the utility model transducer architecture synoptic diagram.
By shown in Figure 1, the utility model ultrasonic transducer is made of radiation film 1, acoustic impedance matching materials 2, impedance matching sheet metal 3, radiation piece 4, two piezoelectric ceramics 5, pole piece 6, match block 7, and wherein radiation film 1, acoustic impedance matching materials 2, impedance matching sheet metal 3 bondings are formed the layer structure of acoustic impedance compatible portion; By forming the sandwich oscillator of horseshoe type ultrasonic transducer with mutually bonding radiation piece 4 and two piezoelectric ceramics 5, pole piece 6, the match block 7 of the impedance matching sheet metal 3 of acoustic impedance compatible portion.Described pole piece 6 is clipped in the middle of two blocks of piezoelectric ceramics 5.
Claims (1)
1. ultrasonic transducer, comprise the sandwich oscillator that constitutes by radiation piece 4, piezoelectric ceramics 5, pole piece 6, match block 7, it is characterized in that the acoustic impedance compatible portion that bonds together with sandwich oscillator is that acoustic impedance is followed successively by impedance matching sheet metal 3, acoustic impedance matching materials 2, the radiation film 1 bonding with the radiation piece 4 of sandwich oscillator from high to low, by the bonding layer structure that is superimposed as.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00261518 CN2459632Y (en) | 2000-11-10 | 2000-11-10 | Ultrasonic wave transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00261518 CN2459632Y (en) | 2000-11-10 | 2000-11-10 | Ultrasonic wave transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2459632Y true CN2459632Y (en) | 2001-11-14 |
Family
ID=33617007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00261518 Expired - Lifetime CN2459632Y (en) | 2000-11-10 | 2000-11-10 | Ultrasonic wave transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2459632Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538546A (en) * | 2014-12-26 | 2015-04-22 | 陕西师范大学 | Radial vibration annular piezoelectric ceramic composite transformer |
| CN106796203A (en) * | 2014-10-17 | 2017-05-31 | 瓦里安半导体设备公司 | In the system of high temperature measurement material thickness |
-
2000
- 2000-11-10 CN CN 00261518 patent/CN2459632Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106796203A (en) * | 2014-10-17 | 2017-05-31 | 瓦里安半导体设备公司 | In the system of high temperature measurement material thickness |
| CN104538546A (en) * | 2014-12-26 | 2015-04-22 | 陕西师范大学 | Radial vibration annular piezoelectric ceramic composite transformer |
| CN104538546B (en) * | 2014-12-26 | 2017-07-11 | 陕西师范大学 | A kind of radial vibration annular piezoelectric Ceramic Composite transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |