JPS57133360A - Potential sensor - Google Patents
Potential sensorInfo
- Publication number
- JPS57133360A JPS57133360A JP1965681A JP1965681A JPS57133360A JP S57133360 A JPS57133360 A JP S57133360A JP 1965681 A JP1965681 A JP 1965681A JP 1965681 A JP1965681 A JP 1965681A JP S57133360 A JPS57133360 A JP S57133360A
- Authority
- JP
- Japan
- Prior art keywords
- tuning fork
- arm
- tip
- detection hole
- potential
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gyroscopes (AREA)
Abstract
PURPOSE:To improve operability in comparison with that of conventional potential sensors and to lessen the number of components by arranging a tuning fork in such a manner that the tip of the arm thereof traverses an electric flux line and by making the detected potential delivered from this arm. CONSTITUTION:The tip of the tuning fork is arranged at the back of a detection hole 8 provided at a case 4, and one of two arms stuck to the base part 12 of the tuning fork which is an insulator serves also as a detecting electrode. Meanwhile, to the other arm 2, a piezoelectric ceramics 3 is bonded for driving the tuning fork. When the tuning fork vibrates, the part at the tip of the tuning fork which covers the detection hole is changed and the amount of the electric flux line received by the tip part 11 of the arm 10 fluctuates cyclically in accordance with the frequency of the tuning fork, whereby an AC signal proportional to potential is generated at the arm 10. This constitution makes it unnecessary to provide a chopper part and an electrode part separately and, only with consideration to the positional precision of the detection hole and the tip of the arm, the non-uniformity of the sensor can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1965681A JPS57133360A (en) | 1981-02-13 | 1981-02-13 | Potential sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1965681A JPS57133360A (en) | 1981-02-13 | 1981-02-13 | Potential sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57133360A true JPS57133360A (en) | 1982-08-18 |
Family
ID=12005283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1965681A Pending JPS57133360A (en) | 1981-02-13 | 1981-02-13 | Potential sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57133360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720682A (en) * | 1984-11-29 | 1988-01-19 | Matsushita Electric Industrial Co., Ltd. | Surface electric potential sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5459972A (en) * | 1977-10-21 | 1979-05-15 | Ricoh Co Ltd | Alternating current type surface electrometer |
| JPS5624583A (en) * | 1979-08-04 | 1981-03-09 | Ricoh Co Ltd | Field chopper device |
-
1981
- 1981-02-13 JP JP1965681A patent/JPS57133360A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5459972A (en) * | 1977-10-21 | 1979-05-15 | Ricoh Co Ltd | Alternating current type surface electrometer |
| JPS5624583A (en) * | 1979-08-04 | 1981-03-09 | Ricoh Co Ltd | Field chopper device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720682A (en) * | 1984-11-29 | 1988-01-19 | Matsushita Electric Industrial Co., Ltd. | Surface electric potential sensor |
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