JPS55141639A - Vibration sensor - Google Patents
Vibration sensorInfo
- Publication number
- JPS55141639A JPS55141639A JP4876179A JP4876179A JPS55141639A JP S55141639 A JPS55141639 A JP S55141639A JP 4876179 A JP4876179 A JP 4876179A JP 4876179 A JP4876179 A JP 4876179A JP S55141639 A JPS55141639 A JP S55141639A
- Authority
- JP
- Japan
- Prior art keywords
- vibration plate
- engine
- knocking
- circular
- vibration sensor
- 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 detect the knocking of an engine with good sensitivity with a simple constitution by specifying the construction of a vibration sensor.
CONSTITUTION: A circular-thin-plate-form piezoelectric element 11 provided with an electrode surface 16 with a lead wire 17 is secured to the central surface of a circular vibration plate 10 made of metal. The vibration plate 10 is staked and fixed by way of a ring-form retainer 14 and case cover 15 within the housing part 13a of the case body made of metal having a circular cylindrical recess 12 of an inside diameter D which is so selected that the resonance frequencies of the vibration plate 10 become of the knocking frequency region of the engine, whereby the vibration sensor is provided. As a result of this, when the case body 13 vibrates owing to the vibrations of the engine, the vibration plate 10 makes membrane vibrations to cause the piezoelectric element 11 to deform. A voltage is then generated between the both electrode surfaces 16, 16 and the error voltage is fetched to the outside through the lead wire 17, whereby the knocking is detected with good sensitivity without using any band-pass filter.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4876179A JPS55141639A (en) | 1979-04-20 | 1979-04-20 | Vibration sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4876179A JPS55141639A (en) | 1979-04-20 | 1979-04-20 | Vibration sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55141639A true JPS55141639A (en) | 1980-11-05 |
Family
ID=12812257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4876179A Pending JPS55141639A (en) | 1979-04-20 | 1979-04-20 | Vibration sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55141639A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0193378U (en) * | 1987-12-14 | 1989-06-20 | ||
JPH0193379U (en) * | 1987-12-14 | 1989-06-20 | ||
CN109341844A (en) * | 2018-12-06 | 2019-02-15 | 应达利电子股份有限公司 | A kind of jar tester and its detection method |
WO2019230490A1 (en) * | 2018-05-28 | 2019-12-05 | 日本精機株式会社 | Vibration detection sensor |
-
1979
- 1979-04-20 JP JP4876179A patent/JPS55141639A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0193378U (en) * | 1987-12-14 | 1989-06-20 | ||
JPH0193379U (en) * | 1987-12-14 | 1989-06-20 | ||
WO2019230490A1 (en) * | 2018-05-28 | 2019-12-05 | 日本精機株式会社 | Vibration detection sensor |
CN109341844A (en) * | 2018-12-06 | 2019-02-15 | 应达利电子股份有限公司 | A kind of jar tester and its detection method |
CN109341844B (en) * | 2018-12-06 | 2020-12-25 | 深圳市深汕特别合作区应达利电子科技有限公司 | Vibration detector and detection method thereof |
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