JPS5614929A - Resonant type measuring device using piezoelectric element - Google Patents
Resonant type measuring device using piezoelectric elementInfo
- Publication number
- JPS5614929A JPS5614929A JP9205479A JP9205479A JPS5614929A JP S5614929 A JPS5614929 A JP S5614929A JP 9205479 A JP9205479 A JP 9205479A JP 9205479 A JP9205479 A JP 9205479A JP S5614929 A JPS5614929 A JP S5614929A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- measuring device
- oscillation frequency
- variation
- circuit
- 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
Abstract
PURPOSE: To obtain a resonant measuring device substantially free from drift error, by forming an oscillatory circuit with a piezoelectric element and an amplifier, and subject the variation in oscillation frequency due to a pressure applied to the piezoelectric element to arithmetic operation to obtain a pressure variation value.
CONSTITUTION: A piezoelectric material 1, such as a ceramic material is sandwiched between upper and lower electrodes 2, 3 to form a piezoelectric element 4, which is combined with a feedback circuit for an amplifier 8 to form an oscillating circuit. When a pressure applied to the piezoelectric element 4 is varied, an oscillation frequency fO in the oscillating circuit is also varied. A variation Δf in the oscillation frequency is converted into a pressure variation in an arithmetic circuit 9 to display the value on an indicator 10. The oscillation frequency fO in the oscillating circuit is determined in accordance with the physical dimensions of the piezoelectric element. Accordingly, a pressure measuring device substantially free from drift error can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9205479A JPS5614929A (en) | 1979-07-19 | 1979-07-19 | Resonant type measuring device using piezoelectric element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9205479A JPS5614929A (en) | 1979-07-19 | 1979-07-19 | Resonant type measuring device using piezoelectric element |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5614929A true JPS5614929A (en) | 1981-02-13 |
Family
ID=14043785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9205479A Pending JPS5614929A (en) | 1979-07-19 | 1979-07-19 | Resonant type measuring device using piezoelectric element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5614929A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59108928A (en) * | 1982-12-14 | 1984-06-23 | Murata Mfg Co Ltd | Pressure sensor |
-
1979
- 1979-07-19 JP JP9205479A patent/JPS5614929A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59108928A (en) * | 1982-12-14 | 1984-06-23 | Murata Mfg Co Ltd | Pressure sensor |
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