DE60111840D1 - Kapazitive pegelmessungsschaltung und -sonde - Google Patents

Kapazitive pegelmessungsschaltung und -sonde

Info

Publication number
DE60111840D1
DE60111840D1 DE60111840T DE60111840T DE60111840D1 DE 60111840 D1 DE60111840 D1 DE 60111840D1 DE 60111840 T DE60111840 T DE 60111840T DE 60111840 T DE60111840 T DE 60111840T DE 60111840 D1 DE60111840 D1 DE 60111840D1
Authority
DE
Germany
Prior art keywords
probe
capacitor
reference capacitor
level measurement
current source
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.)
Expired - Fee Related
Application number
DE60111840T
Other languages
English (en)
Other versions
DE60111840T2 (de
Inventor
E Martin
Stephen Tymoszuk
N Lease
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.)
Robertshaw Controls Co
Original Assignee
Robertshaw Controls Co
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 Robertshaw Controls Co filed Critical Robertshaw Controls Co
Application granted granted Critical
Publication of DE60111840D1 publication Critical patent/DE60111840D1/de
Publication of DE60111840T2 publication Critical patent/DE60111840T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01F23/26—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
    • 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
    • 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
    • G01F23/268—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 mounting arrangements of probes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measuring Leads Or Probes (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
DE60111840T 2000-04-14 2001-04-13 Kapazitive pegelmessungsschaltung und -sonde Expired - Fee Related DE60111840T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US19719500P 2000-04-14 2000-04-14
US197195P 2000-04-14
PCT/US2001/012145 WO2001079789A2 (en) 2000-04-14 2001-04-13 Capacitance level measurement circuit and system

Publications (2)

Publication Number Publication Date
DE60111840D1 true DE60111840D1 (de) 2005-08-11
DE60111840T2 DE60111840T2 (de) 2006-08-03

Family

ID=22728422

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60111840T Expired - Fee Related DE60111840T2 (de) 2000-04-14 2001-04-13 Kapazitive pegelmessungsschaltung und -sonde

Country Status (7)

Country Link
US (1) US6529017B2 (de)
EP (1) EP1274972B1 (de)
AT (1) ATE299267T1 (de)
AU (2) AU2001259069B2 (de)
DE (1) DE60111840T2 (de)
ES (1) ES2245362T3 (de)
WO (1) WO2001079789A2 (de)

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US6825765B2 (en) * 1998-12-30 2004-11-30 Automotive Systems Laboratory, Inc. Occupant detection system
US8784335B2 (en) * 2002-04-19 2014-07-22 Sanofi-Aventis Deutschland Gmbh Body fluid sampling device with a capacitive sensor
US6951549B1 (en) * 2002-09-30 2005-10-04 Advanced Cardiovascular Systems, Inc. Systems and methods for detecting tissue contact and needle penetration depth
US6857313B2 (en) 2003-03-31 2005-02-22 Rochester Gauges, Inc. Self-calibrating capacitance gauge
US7114391B2 (en) 2003-12-26 2006-10-03 Ngk Spark Plug Co., Ltd. Liquid level detection apparatus
US7726334B2 (en) 2004-01-22 2010-06-01 Rochester Gauges, Inc. Service valve assembly having a stop-fill device and remote liquid level indicator
FR2865921B1 (fr) * 2004-02-11 2007-06-01 Spinevision Dispositif d'exploration pour le suivi de la penetration d'un instrument dans une structure anatomique
DE602004011232T2 (de) * 2004-11-15 2008-12-24 S.I.E.M. S.R.L. Füllstandssensor, der seine Betriebsenergie aus einem Anzeigeinstrument gewinnt
EP1677084A1 (de) 2004-12-22 2006-07-05 Roxer Industries S.A. Flüssigkeitspegelsensor und Verfahren zur Schätzung
US7284427B2 (en) * 2005-06-08 2007-10-23 Lumenite Control Technology, Inc. Self-calibrating liquid level transmitter
PL1862806T3 (pl) 2006-06-01 2018-01-31 Electrolux Home Products Corp Nv Sposób i urządzenie do pomiaru pojemności elektrycznej elementu pojemnościowego
US7690323B2 (en) 2007-10-31 2010-04-06 Rochester Gauges, Inc. Gauge head assembly with non-magnetic insert
US8059103B2 (en) * 2007-11-21 2011-11-15 3M Innovative Properties Company System and method for determining touch positions based on position-dependent electrical charges
US7830158B2 (en) * 2007-12-28 2010-11-09 3M Innovative Properties Company Time-sloped capacitance measuring circuits and methods
US8183875B2 (en) * 2008-11-26 2012-05-22 3M Innovative Properties Company System and method for determining touch positions based on passively-induced position-dependent electrical charges
US8866499B2 (en) * 2009-08-27 2014-10-21 Analog Devices, Inc. System and method for measuring capacitance
CA2753588C (en) 2011-09-27 2016-01-26 Westport Power Inc. Apparatus and method for volume and mass estimation of a multiphase fluid stored at cryogenic temperatures
US20130223111A1 (en) * 2012-02-23 2013-08-29 System General Corporation Digital control circuit for resonant power converters
TWI445971B (zh) * 2012-07-20 2014-07-21 Wistron Corp 信號量測系統
GB2505190A (en) * 2012-08-21 2014-02-26 Schrader Electronics Ltd Level sensing in a vehicle fuel tank using electromagnetic fields
US10598650B2 (en) 2012-08-22 2020-03-24 General Electric Company System and method for measuring an operative condition of a machine
CN102997974B (zh) * 2012-12-24 2014-12-10 电子科技大学 一种自适应式电容液位计
CN103353324B (zh) * 2013-06-05 2016-10-05 王云平 一种自校准的电容式液位传感器
US9476752B2 (en) * 2014-10-01 2016-10-25 Sealed Air Corporation Fluid level sensor
AU2016228266A1 (en) * 2015-09-29 2017-04-13 General Electric Company System and method for measuring an operative condition of a machine
TWI553300B (zh) * 2015-12-01 2016-10-11 財團法人工業技術研究院 液面感測裝置
SE1750077A1 (sv) * 2017-01-31 2018-08-01 Styr Och Elinstallationer Vaest Teknik Ab Serving system and sensor device for pick-and-mix sales
ES2773181T3 (es) * 2017-02-22 2020-07-09 Zodiac Aerotechnics Sonda de combustible de condensador
DE102017127145B4 (de) * 2017-11-17 2021-03-04 BEDIA Motorentechnik GmbH & Co. KG Vorrichtung und Verfahren zur kapazitiven Messung eines Füllstands eines Füllmediums
CN108692791A (zh) * 2018-03-30 2018-10-23 厦门乐人电子有限公司 液位检测装置和液体容器
US10996095B2 (en) * 2018-07-24 2021-05-04 Sensata Technologies, Inc. Dielectric-constant-insensitive fluid level sensor

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
US2544685A (en) 1946-02-20 1951-03-13 Frank H Jackson Testing device
US2929021A (en) 1957-03-13 1960-03-15 Western Electric Co Capacitance and breakdown test set for capacitors
US2940037A (en) 1957-12-16 1960-06-07 Lockheed Aircraft Corp Capacitance meter
US3612997A (en) 1970-02-18 1971-10-12 John Paulkovich Capacitor apparatus including a reference capacitor for controlling the current flow through a capacitance being measured
US3774238A (en) * 1971-12-09 1973-11-20 Spearhead Inc Three-terminal capacitive apparatus for remotely responding to a condition or dielectric properties of a material
US4383444A (en) * 1980-04-21 1983-05-17 Robertshaw Controls Company Microprocessor based capacitance level detection system
US4590575A (en) * 1981-12-15 1986-05-20 Robertshaw Controls Company Dielectric compensated level control system for use in tanks containing substance
US4558274A (en) 1983-09-14 1985-12-10 Johnson Service Company Apparatus and method determining the value of a capacitance
DE3610166A1 (de) * 1985-04-03 1986-10-09 Smiths Industries Public Ltd. Co., London Fuellstandsmessgeraet
US5045797A (en) * 1986-10-14 1991-09-03 Drexelbrook Controls, Inc. Continuous condition sensing system determining liquid level by admittance measurement
US5073757A (en) 1988-09-23 1991-12-17 John Fluke Mfg. Co., Inc. Apparatus for and method of measuring capacitance of a capacitive element
US5136251A (en) 1988-09-23 1992-08-04 John Fluke Mfg. Co., Inc. Capacitance measurement
US5469354A (en) 1989-06-14 1995-11-21 Hitachi, Ltd. Document data processing method and apparatus for document retrieval
DE4329571A1 (de) * 1992-09-02 1994-03-03 Duerrwaechter E Dr Doduco Neigungssensor
US5576628A (en) * 1994-09-30 1996-11-19 Telcom Semiconductor, Inc. Method and apparatus to measure capacitance
US6016697A (en) * 1997-09-09 2000-01-25 American Magnetics, Inc. Capacitive level sensor and control system

Also Published As

Publication number Publication date
DE60111840T2 (de) 2006-08-03
EP1274972A2 (de) 2003-01-15
WO2001079789A3 (en) 2002-02-28
AU5906901A (en) 2001-10-30
WO2001079789A2 (en) 2001-10-25
ATE299267T1 (de) 2005-07-15
US20020008526A1 (en) 2002-01-24
ES2245362T3 (es) 2006-01-01
EP1274972B1 (de) 2005-07-06
US6529017B2 (en) 2003-03-04
AU2001259069B2 (en) 2004-09-30

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: ROBERTSHAW CONTROLS CO., RICHMOND, VA., US

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee