JPS6475901A - Displacement detector - Google Patents
Displacement detectorInfo
- Publication number
- JPS6475901A JPS6475901A JP23531187A JP23531187A JPS6475901A JP S6475901 A JPS6475901 A JP S6475901A JP 23531187 A JP23531187 A JP 23531187A JP 23531187 A JP23531187 A JP 23531187A JP S6475901 A JPS6475901 A JP S6475901A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- resonance
- displacement
- coils
- 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
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE:To reduce detecting errors and to make it possible to ensure positive measurement of displacement, by using coils which are wound with high temperature superconductors as resonance circuits, and detecting the displacement of a displacing member facing the circuit from the change in resonance frequencies. CONSTITUTION:Primary and secondary coils 1a and 2c are wound with high temperature superconductors. The coil 2c is displaced in a facing pattern with the coil 1a. The coil 1a is excited with an AC power source 4 and the frequency of the current is changed. The resonance frequency, when the value of an AC ammeter 7 becomes the minimum value, is obtained. Then, the position of the coil 2c is changed, and the resonance frequency of a circuit is obtained by the same way. Q of this resonance circuit becomes large since the resistances of the coils 1a and 1c are close to zero. Therefore, the resonance frequency can be obtained accurately. Thus the displacement can be detected from the difference between both frequencies.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23531187A JPS6475901A (en) | 1987-09-17 | 1987-09-17 | Displacement detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23531187A JPS6475901A (en) | 1987-09-17 | 1987-09-17 | Displacement detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6475901A true JPS6475901A (en) | 1989-03-22 |
Family
ID=16984230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23531187A Pending JPS6475901A (en) | 1987-09-17 | 1987-09-17 | Displacement detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6475901A (en) |
-
1987
- 1987-09-17 JP JP23531187A patent/JPS6475901A/en active Pending
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