DE69429755T2 - Kapazitätsmesseinrichtung - Google Patents

Kapazitätsmesseinrichtung

Info

Publication number
DE69429755T2
DE69429755T2 DE69429755T DE69429755T DE69429755T2 DE 69429755 T2 DE69429755 T2 DE 69429755T2 DE 69429755 T DE69429755 T DE 69429755T DE 69429755 T DE69429755 T DE 69429755T DE 69429755 T2 DE69429755 T2 DE 69429755T2
Authority
DE
Germany
Prior art keywords
capacitance
charge
voltage
time
charging
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
DE69429755T
Other languages
German (de)
English (en)
Other versions
DE69429755D1 (de
Inventor
Brian J. Goodwind
Gary G. Sanders
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.)
Penberthy Inc
Original Assignee
Penberthy Inc
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 Penberthy Inc filed Critical Penberthy Inc
Publication of DE69429755D1 publication Critical patent/DE69429755D1/de
Application granted granted Critical
Publication of DE69429755T2 publication Critical patent/DE69429755T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • 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
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Measuring Fluid Pressure (AREA)
DE69429755T 1993-09-17 1994-09-16 Kapazitätsmesseinrichtung Expired - Fee Related DE69429755T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/123,316 US5461321A (en) 1993-09-17 1993-09-17 Apparatus and method for measuring capacitance from the duration of a charge-discharge charge cycle

Publications (2)

Publication Number Publication Date
DE69429755D1 DE69429755D1 (de) 2002-03-14
DE69429755T2 true DE69429755T2 (de) 2002-09-26

Family

ID=22407936

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69429755T Expired - Fee Related DE69429755T2 (de) 1993-09-17 1994-09-16 Kapazitätsmesseinrichtung

Country Status (10)

Country Link
US (2) US5461321A (enExample)
EP (1) EP0644432B1 (enExample)
KR (1) KR950009271A (enExample)
CN (1) CN1111355A (enExample)
AT (1) ATE212726T1 (enExample)
AU (1) AU677087B2 (enExample)
CA (1) CA2132225C (enExample)
DE (1) DE69429755T2 (enExample)
ES (1) ES2171426T3 (enExample)
TW (1) TW247350B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
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US6984900B1 (en) * 1998-10-09 2006-01-10 Azoteq (Pty) Ltd. Intelligent electrical switch
US6249089B1 (en) 1998-10-09 2001-06-19 Frederick Bruwer Intelligent electrical device comprising microchip
FR2785046B1 (fr) * 1998-10-23 2001-01-26 Claude Launay Dispositif de mesure reposant sur la mesure indirecte de la permittivite
US6186001B1 (en) * 1999-06-18 2001-02-13 William J. Baker Sensor for measuring content levels in containers
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US9500686B1 (en) 2007-06-29 2016-11-22 Cypress Semiconductor Corporation Capacitance measurement system and methods
US7804307B1 (en) * 2007-06-29 2010-09-28 Cypress Semiconductor Corporation Capacitance measurement systems and methods
US8089289B1 (en) 2007-07-03 2012-01-03 Cypress Semiconductor Corporation Capacitive field sensor with sigma-delta modulator
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US8169238B1 (en) 2007-07-03 2012-05-01 Cypress Semiconductor Corporation Capacitance to frequency converter
US7667468B1 (en) * 2007-07-24 2010-02-23 Cypress Semiconductor Corporation Capacitive sensor with ratiometric voltage references
US7830158B2 (en) * 2007-12-28 2010-11-09 3M Innovative Properties Company Time-sloped capacitance measuring circuits and methods
US8525798B2 (en) 2008-01-28 2013-09-03 Cypress Semiconductor Corporation Touch sensing
US8358142B2 (en) 2008-02-27 2013-01-22 Cypress Semiconductor Corporation Methods and circuits for measuring mutual and self capacitance
US8319505B1 (en) 2008-10-24 2012-11-27 Cypress Semiconductor Corporation Methods and circuits for measuring mutual and self capacitance
US9104273B1 (en) 2008-02-29 2015-08-11 Cypress Semiconductor Corporation Multi-touch sensing method
US7804599B2 (en) * 2008-07-24 2010-09-28 MGM Instruments, Inc. Fluid volume verification system
US8321174B1 (en) 2008-09-26 2012-11-27 Cypress Semiconductor Corporation System and method to measure capacitance of capacitive sensor array
WO2010063026A1 (en) * 2008-11-28 2010-06-03 Ametek, Inc. Apparatus for high precision measurement of varied surface and material levels
US8225654B2 (en) * 2009-07-01 2012-07-24 Tecan Trading Ag Self-compensating capacitive liquid level detector
US8723827B2 (en) 2009-07-28 2014-05-13 Cypress Semiconductor Corporation Predictive touch surface scanning
TWI385394B (en) * 2009-09-18 2013-02-11 Method of capacitance measurement for capacitive touch panel
CN101799496B (zh) * 2010-03-09 2013-03-20 臧佳菁 电容测量装置及其方法
CN101858941A (zh) * 2010-03-30 2010-10-13 矽创电子股份有限公司 具抗电磁干扰能力的电容感测电路
DE102012201596A1 (de) * 2012-02-03 2013-08-08 Robert Bosch Gmbh Empfangsanordnung für ein Steuergerät in einem Fahrzeug und Verfahren zum Erzeugen eines Synchronisationspulses
US9261395B2 (en) * 2012-02-13 2016-02-16 Goodrich Corporation Liquid level sensing system
TWI448696B (zh) * 2012-07-05 2014-08-11 Chroma Ate Inc 訊號量測裝置
EP2741087B1 (en) * 2012-12-04 2019-10-02 F. Hoffmann-La Roche AG Method and system for fluid surface detection
EP2757352B1 (fr) * 2013-01-17 2015-11-18 EM Microelectronic-Marin SA Système de contrôle et méthode de gestion de capteur
FR3002643B1 (fr) * 2013-02-26 2015-04-03 Continental Automotive France Procede de recherche de variation electrique d'un capteur capacitif de vehicule automobile
DE102015008485A1 (de) * 2015-07-01 2017-01-05 Leopold Kostal Gmbh & Co. Kg Verfahren zum Messen eines Kapazitätswertes
US9874470B2 (en) * 2016-01-12 2018-01-23 Tank Vision, Inc. Fuel tank level monitoring system
TWI621984B (zh) * 2016-12-02 2018-04-21 瑞鼎科技股份有限公司 電容値量測電路及電容値量測方法
US9853655B1 (en) * 2017-03-01 2017-12-26 Infineon Technologies Ag Testing a capacitor array by delta charge
US11531424B2 (en) * 2017-09-07 2022-12-20 Cypress Semiconductor Corporation Nano-power capacitance-to-digital converter
DE102017127145B4 (de) * 2017-11-17 2021-03-04 BEDIA Motorentechnik GmbH & Co. KG Vorrichtung und Verfahren zur kapazitiven Messung eines Füllstands eines Füllmediums
PL3752799T3 (pl) 2018-02-13 2025-08-04 Renk America Llc Wskaźnik prętowy i elektroniczny czujnik poziomu płynu
US10693367B1 (en) * 2019-02-19 2020-06-23 Rolls-Royce North American Technologies, Inc. Pre-charging circuit for power converters
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CN111076790B (zh) * 2019-12-30 2021-06-22 上海科勒电子科技有限公司 一种液位监测方法、存储介质和电子设备
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007407A1 (de) * 2007-02-12 2008-08-21 Krohne S.A. Füllstandsschalter und Verfahren zur Erfassung des Füllzustands eines in einem Behälter vorgesehenen Mediums

Also Published As

Publication number Publication date
US5461321A (en) 1995-10-24
ATE212726T1 (de) 2002-02-15
DE69429755D1 (de) 2002-03-14
CA2132225C (en) 1997-12-23
EP0644432A2 (en) 1995-03-22
CN1111355A (zh) 1995-11-08
EP0644432A3 (en) 1996-04-17
AU677087B2 (en) 1997-04-10
AU7304294A (en) 1995-03-30
EP0644432B1 (en) 2002-01-30
KR950009271A (ko) 1995-04-21
US5554937A (en) 1996-09-10
CA2132225A1 (en) 1995-03-18
ES2171426T3 (es) 2002-09-16
TW247350B (enExample) 1995-05-11

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Legal Events

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