JPS5692440A - Detecting device for liquid in insulating conduit - Google Patents

Detecting device for liquid in insulating conduit

Info

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
Application number
JP16975479A
Other languages
Japanese (ja)
Inventor
Masao Kohama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16975479A priority Critical patent/JPS5692440A/en
Publication of JPS5692440A publication Critical patent/JPS5692440A/en
Pending legal-status Critical Current

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
JP16975479A 1979-12-26 1979-12-26 Detecting device for liquid in insulating conduit Pending JPS5692440A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
ES460534A1 (en) Article presence sensor
JPS5692440A (en) Detecting device for liquid in insulating conduit
JPS5336268A (en) Level detecting circuit of liquid
JPS51111358A (en) Liquid-level-lowering detection device for battery electrolyte
JPS5670245A (en) Double feed detection system
JPS56153202A (en) Displacement detecting device
JPS55144557A (en) Surface potentiometer
JPS56108641A (en) Paper leaf detecting device
JPS57200814A (en) Detection amplifier
JPS57106804A (en) Measuring device for thickness of film
JPS5214488A (en) Monitoring device of automatic blood corpuscle measuring equpment
JPS54125537A (en) Lighting-fire detection device
JPS5357490A (en) Trouble detecting system for electric appliances
JPS5297090A (en) Disconnection and contact failure detector of detecting potentiometer in automatic control
JPS51111359A (en) Liquid-level-lowering detection device for battery electrolyte
JPS5443034A (en) Paper detecting method
JPS55149848A (en) Measuring instrument of induction system for surface electric potential
JPS57106803A (en) Measuring device for thickness of film
JPS5671180A (en) Recording paper terminal detection system
JPS5418782A (en) Surface electrometer
JPS5246875A (en) Pressure measuring device
JPS5614938A (en) Bubble and liquid level detecting system
JPS5443032A (en) Recording paper detector
JPS5672357A (en) Failure detector
JPS5242138A (en) Equipment for detecting scales