JPH0342527U - - Google Patents

Info

Publication number
JPH0342527U
JPH0342527U JP1989101801U JP10180189U JPH0342527U JP H0342527 U JPH0342527 U JP H0342527U JP 1989101801 U JP1989101801 U JP 1989101801U JP 10180189 U JP10180189 U JP 10180189U JP H0342527 U JPH0342527 U JP H0342527U
Authority
JP
Japan
Prior art keywords
operational amplifier
resistor
inverting input
output
level detection
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
JP1989101801U
Other languages
English (en)
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 filed Critical
Priority to JP1989101801U priority Critical patent/JPH0342527U/ja
Priority to GB9018870A priority patent/GB2235538B/en
Priority to US07/575,704 priority patent/US5001928A/en
Priority to DE4027692A priority patent/DE4027692A1/de
Publication of JPH0342527U publication Critical patent/JPH0342527U/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Level Indicators Using A Float (AREA)

Description

【図面の簡単な説明】
第１図は本考案による液面レベル検出装置の一
実施例を示す回路図、第２図は従来の液面レベル
検出装置の一例を示す回路図である。 ＲＬ……レベル検出抵抗、ＲＨ……温度補償抵
抗、ＯＰ１……第１のオペアンプ、ＯＰ２……第
２のオペアンプ、Ｒ１〜Ｒ５……抵抗、１……定
電流源。

Claims (1)

  1. 【実用新案登録請求の範囲】 液体中に充填されその液面レベルに応じて抵抗
    値が変化するレベル検出抵抗ＲＬと、 該レベル検出抵抗ＲＬに所定電流を供給する手
    段と、 第１及び第２のオペアンプＯＰ１，ＯＰ２と、 前記第１のオペアンプＯＰ１の反転入力とアー
    ス間に接続された第１の抵抗Ｒ１と、 前記第１のオペアンプＯＰ１の反転入力と出力
    間に接続された第２の抵抗Ｒ２と、 前記第１のオペアンプの非反転入力とレベル検
    出抵抗ＲＬ間に直列接続され前記第１の抵抗Ｒ１
    と等しい抵抗値を有する第３の抵抗Ｒ３と、 前記第１のオペアンプＯＰ１の非反転入力と前
    記第２のオペアンプＯＰ２の出力間に接続され前
    記第２の抵抗Ｒ２と等しい抵抗値を有する第４の
    抵抗Ｒ４と、 前記第２のオペアンプＯＰ２の出力と反転入力
    とを接続する手段と、 前記第１のオペアンプＯＰ１の出力と前記第２
    のオペアンプＯＰ２の非反転入力間に接続され前
    記レベル検出抵抗ＲＬと等しい温度係数を有する
    温度補償抵抗ＲＨと、 前記第２のオペアンプＯＰ２の非反転入力とア
    ース間に接続された第５の抵抗Ｒ５とを備え、 前記第１及び第２の抵抗Ｒ１，Ｒ２と抵抗比Ｒ
    １／Ｒ２と、前記第５の抵抗Ｒ５及び前記温度補
    償抵抗ＲＨの固定抵抗値ＲＨ′の抵抗比Ｒ５／Ｒ
    Ｈ′とを等しくし、前記第２のオペアンプＯＰ２
    の出力より前記液体の液面レベルに応じた出力を
    得るようにした、 ことを特徴とする液面レベル検出装置。
JP1989101801U 1989-09-01 1989-09-01 Pending JPH0342527U (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1989101801U JPH0342527U (ja) 1989-09-01 1989-09-01
GB9018870A GB2235538B (en) 1989-09-01 1990-08-30 Liquid level detecting apparatus
US07/575,704 US5001928A (en) 1989-09-01 1990-08-31 Liquid level detecting apparatus
DE4027692A DE4027692A1 (de) 1989-09-01 1990-08-31 Vorrichtung zur fluessigkeitspegelerfassung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989101801U JPH0342527U (ja) 1989-09-01 1989-09-01

Publications (1)

Publication Number Publication Date
JPH0342527U true JPH0342527U (ja) 1991-04-22

Family

ID=14310249

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989101801U Pending JPH0342527U (ja) 1989-09-01 1989-09-01

Country Status (4)

Country Link
US (1) US5001928A (ja)
JP (1) JPH0342527U (ja)
DE (1) DE4027692A1 (ja)
GB (1) GB2235538B (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5143452A (en) * 1991-02-04 1992-09-01 Rockwell International Corporation System for interfacing a single sensor unit with multiple data processing modules
US5355720A (en) * 1992-06-04 1994-10-18 Perma-Pipe, Inc. Corrosion resistant cable
DE19747737C2 (de) * 1997-10-29 1999-11-25 Siemens Ag Vorrichtung zur Messung des Flüssigkeitsfüllstandes in Behältern, insbesondere des Ölstandes für Brennkraftmaschinen von Kraftfahrzeugen
US6917503B2 (en) * 2003-10-29 2005-07-12 Texas Instruments Incorporated Programmable current limiting using a shunt resistor
KR102381655B1 (ko) * 2018-03-21 2022-03-31 주식회사 엘지에너지솔루션 냉각수 누설 검출 장치

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455198A1 (de) * 1974-11-21 1976-05-26 Bernd Dipl Phys Volle Vorrichtung zur bestimmung und anzeige des standes einer fluessigkeit
DE3134912C2 (de) * 1981-09-03 1984-05-10 TRW Messmer GmbH & Co KG, 7760 Radolfzell Schaltungsanordnung zur kontinuierlichen Messung desFüllstandes in einem mit Flüssigkeit zumindest teilweise gefüllten Behälter
FR2522065B1 (fr) * 1982-02-19 1985-09-06 Jaeger Dispositif d'affichage systematique du niveau d'huile pour vehicule
GB2136965A (en) 1983-03-07 1984-09-26 Braude E Liquid level sensor
DE3445541A1 (de) * 1984-01-04 1985-07-11 Skandiafabriken AB, Mullsjö Fluessigkeits-fuellstandsanzeiger
DE3408824A1 (de) * 1984-03-10 1985-09-12 Vdo Adolf Schindling Ag, 6000 Frankfurt Schaltungsanordnung zur elektrothermischen, umgebungstemperatur-kompensierten fuellstandsmessung
JPS6215415A (ja) * 1985-07-12 1987-01-23 Hitachi Koki Co Ltd インクレベル検出装置
DE3603539A1 (de) * 1986-02-05 1987-08-06 Merckens J G Gmbh & Co Kg Vorrichtung zur erfassung eines fluessigkeits-pegelstandes
JPS647116A (en) * 1987-06-29 1989-01-11 Nippon Telegraph & Telephone Transistor constant voltage generating circuit
DE3742783C2 (de) * 1987-12-17 1994-07-21 Hella Kg Hueck & Co Vorrichtung zur Messung des Flüssigkeitsfüllstands in Behältern, insbesondere des Ölstands in Brennkraftmaschinen von Kraftfahrzeugen
JPH01199124A (ja) * 1988-02-04 1989-08-10 Matsushita Electric Ind Co Ltd 燃料液位検出装置

Also Published As

Publication number Publication date
GB2235538A (en) 1991-03-06
US5001928A (en) 1991-03-26
DE4027692A1 (de) 1991-03-14
GB2235538B (en) 1994-06-01
DE4027692C2 (ja) 1992-06-25
GB9018870D0 (en) 1990-10-17

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