JPS551522A - Stress sensor - Google Patents
Stress sensorInfo
- Publication number
- JPS551522A JPS551522A JP7411478A JP7411478A JPS551522A JP S551522 A JPS551522 A JP S551522A JP 7411478 A JP7411478 A JP 7411478A JP 7411478 A JP7411478 A JP 7411478A JP S551522 A JPS551522 A JP S551522A
- Authority
- JP
- Japan
- Prior art keywords
- temperature characteristics
- surface wave
- outputs
- oscillators
- counter
- 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
- Oscillators With Electromechanical Resonators (AREA)
- Electric Clocks (AREA)
Abstract
PURPOSE: To make temperature characteristics of sensitivity stabler and circuits simpler by providing a stable oscilating source for time base of a counter having the same characteristics as the temperature characteristics of the outputs of elastic surface wave oscillators.
CONSTITUTION: Elastic surface wave elements 10, 11 are affixed to both surfaces of a beam 2. Amplifiers 3 are connected between the input and output electrodes of the elements 10, 11 to constitute surface wave oscillators 13, 14. The oscillation frequencies when load 1 is applied to the beam 2 are detected with a counter 6, by which the magnitude of the load 1 is obtained. In this case, the temperature characteristics of the oscillator outputs and the temperature characteristics of a stable oscillating source 7 for time base are made equal. The oscillating source 7 outputs the differential frequencies of the oscillators 13, 14 by Y-cut crystal vibrators.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7411478A JPS551522A (en) | 1978-06-21 | 1978-06-21 | Stress sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7411478A JPS551522A (en) | 1978-06-21 | 1978-06-21 | Stress sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS551522A true JPS551522A (en) | 1980-01-08 |
Family
ID=13537843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7411478A Pending JPS551522A (en) | 1978-06-21 | 1978-06-21 | Stress sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS551522A (en) |
-
1978
- 1978-06-21 JP JP7411478A patent/JPS551522A/en active Pending
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