JPS55135718A - Oscillation sensor - Google Patents
Oscillation sensorInfo
- Publication number
- JPS55135718A JPS55135718A JP4348679A JP4348679A JPS55135718A JP S55135718 A JPS55135718 A JP S55135718A JP 4348679 A JP4348679 A JP 4348679A JP 4348679 A JP4348679 A JP 4348679A JP S55135718 A JPS55135718 A JP S55135718A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- sensor
- oscillation
- expansion coefficient
- thermal expansion
- 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
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To increase the durability of sensor, by reducing the thermal stress on the fixed surface, through the formation of the diaphragm plate fitting thin plate shaped piezoelectric element with almost the same material in the thermal expansion coefficient as that of the piezoelectric element.
CONSTITUTION: The piezoelectric element 14 of thin plate is fitted to the diaphragm plate 15, which is oscillated with the piezoelectric element 14. The oscillation of internal-combustion engines is detected with the voltage produced by oscillation deformation of the piezoelectric element 14. In such a sensor, the diaphragm plate 15 is made with the material having almost the same thermal expansion coefficient as the piezoelectric element 14, e.g., ceramic (thermal expansion coefficient:3W7× 10-6/°C). Thus, the thermal stress exerted on the fixed surface between the diapharagm plate 15 and the piezoelectric element 14 is minimized and the durability of the oscillation sensor can remarkably be increased.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4348679A JPS55135718A (en) | 1979-04-10 | 1979-04-10 | Oscillation sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4348679A JPS55135718A (en) | 1979-04-10 | 1979-04-10 | Oscillation sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55135718A true JPS55135718A (en) | 1980-10-22 |
Family
ID=12665041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4348679A Pending JPS55135718A (en) | 1979-04-10 | 1979-04-10 | Oscillation sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55135718A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0594331A1 (en) * | 1992-10-19 | 1994-04-27 | Oki Ceramic Industry Co., Ltd. | Piezoelectric sensor |
-
1979
- 1979-04-10 JP JP4348679A patent/JPS55135718A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0594331A1 (en) * | 1992-10-19 | 1994-04-27 | Oki Ceramic Industry Co., Ltd. | Piezoelectric sensor |
US5376860A (en) * | 1992-10-19 | 1994-12-27 | Oki Ceramic Industry Co, Ltd. | Piezoelectric sensor |
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