JPS55154421A - Acoustic wave sensor - Google Patents
Acoustic wave sensorInfo
- Publication number
- JPS55154421A JPS55154421A JP6216179A JP6216179A JPS55154421A JP S55154421 A JPS55154421 A JP S55154421A JP 6216179 A JP6216179 A JP 6216179A JP 6216179 A JP6216179 A JP 6216179A JP S55154421 A JPS55154421 A JP S55154421A
- Authority
- JP
- Japan
- Prior art keywords
- waves
- detecting
- acoustic wave
- constitution
- kinds
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To enable accurate detection without any change in impedance characteristic depending upon the thicknesses, kinds, etc. of the material to be measured by using the detecting element composed of the piezoelectric ceramics which is of disc or cylindrical shape, is parallel to the detecting surface and is polarized in the radial direction.
CONSTITUTION: In the acoustic wave sensor which detects the elastic waves (AE waves) generated at the breakdown precursor phenomena of solid material, this detecting element 1 is composed of the piezoelectric ceramics polarized in the radial direction having the polarization direction shown by the arrows and is of the constitution comprising by depositing electrodes 2 on the top and bottom surfaces of this element 1, and bonding the bottom surface to a bottom plate 3 (detecting surface) and housing the element in a metal case 4. The sensor output is led to an output terminal 6 through the lead wire 5 from the top surface electrode. These let the accurate detection of AE waves be done with virtually no effect of the kinds and thicknesse of the material to be measured on impedance characteristic.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6216179A JPS55154421A (en) | 1979-05-22 | 1979-05-22 | Acoustic wave sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6216179A JPS55154421A (en) | 1979-05-22 | 1979-05-22 | Acoustic wave sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55154421A true JPS55154421A (en) | 1980-12-02 |
Family
ID=13192108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6216179A Pending JPS55154421A (en) | 1979-05-22 | 1979-05-22 | Acoustic wave sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55154421A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102221399A (en) * | 2011-05-06 | 2011-10-19 | 扬州大学 | Microphone infinity-shaped directional characteristic adapter |
-
1979
- 1979-05-22 JP JP6216179A patent/JPS55154421A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102221399A (en) * | 2011-05-06 | 2011-10-19 | 扬州大学 | Microphone infinity-shaped directional characteristic adapter |
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