JPS55112512A - Capacitive displacement gauge - Google Patents
Capacitive displacement gaugeInfo
- Publication number
- JPS55112512A JPS55112512A JP1938179A JP1938179A JPS55112512A JP S55112512 A JPS55112512 A JP S55112512A JP 1938179 A JP1938179 A JP 1938179A JP 1938179 A JP1938179 A JP 1938179A JP S55112512 A JPS55112512 A JP S55112512A
- Authority
- JP
- Japan
- Prior art keywords
- capacity
- zero point
- point adjustment
- measured
- capacities
- 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
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE: To eliminate the influence of the resistance between capacities by applying pulses of a fixed repeat rate to the measured capacity and the capacity for zero point adjustment through a diode and by measuring the average voltage or the time between two level detection points at a discharging time.
CONSTITUTION: Pulses from signal generator 121 are supplied to not only capacities 124 and 125 between measured electrodes of a capacitive water quantity meter, etc., through resistance 122 and diode 123 but also capacity 128 for zero point adjustment, thereby chagring them. After that, when the pulse voltage breaks, discharging is performed with a constant current through constant current circuits 129 and 130; and when the pulse voltage is between voltages VU1 and VU2 and between voltages VL1 and VL2 respectively, outputs of AND circuits 136 and 137 become H-level, and their average voltage becomes a measured quantity. In this case, indication of indicator 143 can be adjusted to zero or a reference value by adjusting capacity 128 for zero point adjustment.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1938179A JPS55112512A (en) | 1979-02-21 | 1979-02-21 | Capacitive displacement gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1938179A JPS55112512A (en) | 1979-02-21 | 1979-02-21 | Capacitive displacement gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55112512A true JPS55112512A (en) | 1980-08-30 |
Family
ID=11997726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1938179A Pending JPS55112512A (en) | 1979-02-21 | 1979-02-21 | Capacitive displacement gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55112512A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07332917A (en) * | 1994-06-08 | 1995-12-22 | Seikosha Co Ltd | Electrostatic capacity type sensor |
| WO2007025785A1 (en) * | 2005-08-31 | 2007-03-08 | Electrolux Home Products Corporation N.V. | Electronic circuit with capacitive switching ability |
| CN110388870A (en) * | 2018-04-23 | 2019-10-29 | 桂林市晶瑞传感技术有限公司 | Displacement measurement system and displacement measurement method for sensor device |
-
1979
- 1979-02-21 JP JP1938179A patent/JPS55112512A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07332917A (en) * | 1994-06-08 | 1995-12-22 | Seikosha Co Ltd | Electrostatic capacity type sensor |
| WO2007025785A1 (en) * | 2005-08-31 | 2007-03-08 | Electrolux Home Products Corporation N.V. | Electronic circuit with capacitive switching ability |
| EP1777821A1 (en) * | 2005-08-31 | 2007-04-25 | Electrolux Home Products Corporation N.V. | Electronic circuit with capacitative switching ability |
| US8111075B2 (en) | 2005-08-31 | 2012-02-07 | Electrolux Home Products Corporation N.V. | Electronic circuit with capacitive switching ability |
| CN110388870A (en) * | 2018-04-23 | 2019-10-29 | 桂林市晶瑞传感技术有限公司 | Displacement measurement system and displacement measurement method for sensor device |
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