RU94044338A - Датчик уровня - Google Patents

Датчик уровня

Info

Publication number
RU94044338A
RU94044338A RU94044338/28A RU94044338A RU94044338A RU 94044338 A RU94044338 A RU 94044338A RU 94044338/28 A RU94044338/28 A RU 94044338/28A RU 94044338 A RU94044338 A RU 94044338A RU 94044338 A RU94044338 A RU 94044338A
Authority
RU
Russia
Prior art keywords
dipstick
level gage
control circuit
test switch
liquid level
Prior art date
Application number
RU94044338/28A
Other languages
English (en)
Inventor
Бенджамин Лис
Us]
Original Assignee
Робертшоу Контролс Компани (US)
Робертшоу Контролс Компани
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 Робертшоу Контролс Компани (US), Робертшоу Контролс Компани filed Critical Робертшоу Контролс Компани (US)
Publication of RU94044338A publication Critical patent/RU94044338A/ru

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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
    • 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
    • G01F23/26—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—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 capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
    • G01F25/24—Testing proper functioning of electronic circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2829—Testing of circuits in sensor or actuator systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Level Indicators Using A Float (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

Схема проверки для проверки функционирования датчика уровня жидкости. Датчик уровня жидкости включает в себя щуп, который помещают в контролируемое место. Схема управления контролирует изменения емкости щупа вследствие изменений уровня жидкости в контролируемом месте. Переключатель проверки заземляет вход к щупу, что и побуждает схему управления распознавать аварийное состояние. Если при включенном переключателе проверки датчик не приводит в действие аварийную сигнализацию, то датчик должным образом не функционирует и необходим ремонт или замена этого датчика уровня.

Claims (1)

  1. Схема проверки для проверки функционирования датчика уровня жидкости. Датчик уровня жидкости включает в себя щуп, который помещают в контролируемое место. Схема управления контролирует изменения емкости щупа вследствие изменений уровня жидкости в контролируемом месте. Переключатель проверки заземляет вход к щупу, что и побуждает схему управления распознавать аварийное состояние. Если при включенном переключателе проверки датчик не приводит в действие аварийную сигнализацию, то датчик должным образом не функционирует и необходим ремонт или замена этого датчика уровня.
    Figure 00000001
RU94044338/28A 1993-12-17 1994-12-13 Датчик уровня RU94044338A (ru)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/169,340 US5446444A (en) 1993-12-17 1993-12-17 Capacitive threshold detector test circuit
US08/169,340 1993-12-17

Publications (1)

Publication Number Publication Date
RU94044338A true RU94044338A (ru) 1996-10-10

Family

ID=22615261

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94044338/28A RU94044338A (ru) 1993-12-17 1994-12-13 Датчик уровня

Country Status (6)

Country Link
US (1) US5446444A (ru)
EP (1) EP0658748B1 (ru)
JP (1) JPH07260550A (ru)
CA (1) CA2137531A1 (ru)
DE (1) DE69423078T2 (ru)
RU (1) RU94044338A (ru)

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US5585733A (en) * 1992-09-10 1996-12-17 David Sarnoff Research Center Capacitive sensor and method of measuring changes in capacitance
US5461321A (en) * 1993-09-17 1995-10-24 Penberthy, Inc. Apparatus and method for measuring capacitance from the duration of a charge-discharge charge cycle
US5719556A (en) * 1995-05-22 1998-02-17 Albin; Robert Liquid level sensor utilizing AC and resistance
EP0891535B1 (en) * 1996-04-03 2003-09-10 Robertshaw Controls Company Fluid sensor
US5838241A (en) * 1996-12-18 1998-11-17 Robertshaw Controls Company Liquid level transmitter
US5945831A (en) * 1997-06-10 1999-08-31 Sargent; John S. Volume charge density measuring system
TW422215U (en) * 1998-10-22 2001-02-11 Ohu Hee Bum Water dispenser for upright stand type water bottles
US7243540B2 (en) * 2001-05-24 2007-07-17 Potter Electric Signal Company Low-water cut-off system
US6904800B2 (en) * 2001-05-24 2005-06-14 Potter Electric Signal Company Low-water cut-off system
KR200272968Y1 (ko) * 2002-01-30 2002-04-20 김홍배 가정용 두유,순두부,두부 제조장치의 물없음 감지경보장치
KR100499377B1 (ko) 2003-05-27 2005-07-05 김홍배 가정용 두유두부제조기의 스팀 공급장치
KR200329861Y1 (ko) * 2003-07-24 2003-10-10 김홍배 가정용 두유 두부 제조기의 과열 방지장치
KR200331665Y1 (ko) * 2003-08-06 2003-10-30 김홍배 가정용 두유 두부 제조기의 가열 제어장치
KR200336989Y1 (ko) 2003-09-17 2004-01-03 김홍배 가정용 두유두부 제조기의 모터 체결력 보강장치
KR200338469Y1 (ko) * 2003-10-08 2004-01-16 김홍배 자중결합 기능을 갖는 가정용 두유 두부 제조기
US20090000494A1 (en) * 2003-10-08 2009-01-01 Hong-Bae Kim Household soybean milk and tofu maker
KR200338466Y1 (ko) * 2003-10-08 2004-01-16 김홍배 가정용 두유 두부 제조기의 대용량 스위치를 이용한일차측 전원 차단장치
KR200338468Y1 (ko) * 2003-10-08 2004-01-16 김홍배 가정용 두유 두부 제조기의 에어 벤트장치
US20080053316A1 (en) * 2003-10-08 2008-03-06 Hong-Bae Kim Household bean milk and bean curd maker closed by gravity
KR200338467Y1 (ko) * 2003-10-08 2004-01-16 김홍배 가정용 두유 두부 제조기의 손잡이 겸용 록킹장치
KR200338530Y1 (ko) * 2003-10-14 2004-01-16 김홍배 가정용 두유 두부 제조기의 실리콘 팩킹 결합 장치
US7284427B2 (en) * 2005-06-08 2007-10-23 Lumenite Control Technology, Inc. Self-calibrating liquid level transmitter
DE102006011239B3 (de) * 2006-03-10 2007-10-11 Infineon Technologies Ag Sensorschaltung zum Messen einer Messgröße
US7317993B2 (en) * 2006-03-15 2008-01-08 Potter Electric Signal Company Fluid detector recognizing foam and surge conditions
DE202006013335U1 (de) * 2006-08-30 2008-01-03 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Einklemmschutzvorrichtung
KR20080086078A (ko) * 2007-03-21 2008-09-25 삼성전자주식회사 잉크젯 화상형성장치의 잉크 레벨 검출장치 및 그 제어방법
US8936444B2 (en) * 2007-12-07 2015-01-20 Pentair Flow Technologies, Llc Capacitive liquid level sensor
CH702180B1 (de) 2009-11-02 2015-02-13 Tecan Trading Ag Verfahren zum Testen eines Laborgeräts und entsprechendes Laborgerät.
CN102818958B (zh) * 2012-08-22 2014-11-12 山东惠工电气股份有限公司 变电站并联补偿电容器组的在线监测方法及其装置
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Also Published As

Publication number Publication date
EP0658748A3 (en) 1996-02-28
EP0658748B1 (en) 2000-02-23
US5446444A (en) 1995-08-29
JPH07260550A (ja) 1995-10-13
EP0658748A2 (en) 1995-06-21
DE69423078D1 (de) 2000-03-30
CA2137531A1 (en) 1995-06-18
DE69423078T2 (de) 2000-07-13

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