JPS5692440A - Detecting device for liquid in insulating conduit - Google Patents
Detecting device for liquid in insulating conduitInfo
- Publication number
- JPS5692440A JPS5692440A JP16975479A JP16975479A JPS5692440A JP S5692440 A JPS5692440 A JP S5692440A JP 16975479 A JP16975479 A JP 16975479A JP 16975479 A JP16975479 A JP 16975479A JP S5692440 A JPS5692440 A JP S5692440A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- capacitors
- insulating
- bridge circuit
- conduit
- 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
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
PURPOSE: To detect whether the liquid exists in the insulating narrow conduit or not easily and surely without contact, by incorporating two capacitors consisting of opposite electrode plates into the bridge circuit and by detecting capacity change of capacitors.
CONSTITUTION: Bridge circuit 1 is constituted by capacitors 2 and 3, which consist of electrode plates interposing the insulating conduit, and resistances 4 and 5. Presence or absence of the liquid in the insulating conduit is detected by change of the differential potential between output terminals B1 and B2 of bridge circuit 1. Further, the accurate position of the front part of the liquid is detected by detecting the peak point of the DC output signal which passed through differential amplifier 8, rectifier 9, and filter circuit 10.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16975479A JPS5692440A (en) | 1979-12-26 | 1979-12-26 | Detecting device for liquid in insulating conduit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16975479A JPS5692440A (en) | 1979-12-26 | 1979-12-26 | Detecting device for liquid in insulating conduit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5692440A true JPS5692440A (en) | 1981-07-27 |
Family
ID=15892220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16975479A Pending JPS5692440A (en) | 1979-12-26 | 1979-12-26 | Detecting device for liquid in insulating conduit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5692440A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59193343A (en) * | 1983-04-19 | 1984-11-01 | Nippon Denso Co Ltd | Alcohol content sensor |
JP2013533971A (en) * | 2010-07-06 | 2013-08-29 | ブリ−エア・プロコン・エスアーゲーエル | Capacitive electrode structure for measuring moisture |
-
1979
- 1979-12-26 JP JP16975479A patent/JPS5692440A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59193343A (en) * | 1983-04-19 | 1984-11-01 | Nippon Denso Co Ltd | Alcohol content sensor |
JPH0350982B2 (en) * | 1983-04-19 | 1991-08-05 | Nippon Denso Co | |
JP2013533971A (en) * | 2010-07-06 | 2013-08-29 | ブリ−エア・プロコン・エスアーゲーエル | Capacitive electrode structure for measuring moisture |
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