ATE212726T1 - Kapazitätsmesseinrichtung - Google Patents

Kapazitätsmesseinrichtung

Info

Publication number
ATE212726T1
ATE212726T1 AT94114645T AT94114645T ATE212726T1 AT E212726 T1 ATE212726 T1 AT E212726T1 AT 94114645 T AT94114645 T AT 94114645T AT 94114645 T AT94114645 T AT 94114645T AT E212726 T1 ATE212726 T1 AT E212726T1
Authority
AT
Austria
Prior art keywords
measurement device
capacitor
capacity measurement
proportionality
delay
Prior art date
Application number
AT94114645T
Other languages
English (en)
Inventor
Gary G Sanders
Brian J Goodwind
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
Application granted granted Critical
Publication of ATE212726T1 publication Critical patent/ATE212726T1/de

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)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (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)
  • Measuring Fluid Pressure (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
AT94114645T 1993-09-17 1994-09-16 Kapazitätsmesseinrichtung ATE212726T1 (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 (1)

Publication Number Publication Date
ATE212726T1 true ATE212726T1 (de) 2002-02-15

Family

ID=22407936

Family Applications (1)

Application Number Title Priority Date Filing Date
AT94114645T ATE212726T1 (de) 1993-09-17 1994-09-16 Kapazitätsmesseinrichtung

Country Status (10)

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

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US7804307B1 (en) * 2007-06-29 2010-09-28 Cypress Semiconductor Corporation Capacitance measurement systems and methods
US9500686B1 (en) 2007-06-29 2016-11-22 Cypress Semiconductor Corporation Capacitance measurement system and methods
US8169238B1 (en) 2007-07-03 2012-05-01 Cypress Semiconductor Corporation Capacitance to frequency converter
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US8570053B1 (en) 2007-07-03 2013-10-29 Cypress Semiconductor Corporation Capacitive field sensor with sigma-delta modulator
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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
US8319505B1 (en) 2008-10-24 2012-11-27 Cypress Semiconductor Corporation Methods and circuits for measuring mutual and self capacitance
US8358142B2 (en) 2008-02-27 2013-01-22 Cypress Semiconductor Corporation Methods and circuits for measuring mutual and self capacitance
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US7804599B2 (en) * 2008-07-24 2010-09-28 MGM Instruments, Inc. Fluid volume verification system
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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
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TWI448696B (zh) * 2012-07-05 2014-08-11 Chroma Ate Inc 訊號量測裝置
EP2741087B1 (de) * 2012-12-04 2019-10-02 F. Hoffmann-La Roche AG Verfahren und System zur Erkennung von flüssigen Oberflächen
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DE102015008485A1 (de) * 2015-07-01 2017-01-05 Leopold Kostal Gmbh & Co. Kg Verfahren zum Messen eines Kapazitätswertes
US10267665B2 (en) * 2016-01-12 2019-04-23 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
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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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Also Published As

Publication number Publication date
DE69429755D1 (de) 2002-03-14
CN1111355A (zh) 1995-11-08
EP0644432A3 (de) 1996-04-17
US5461321A (en) 1995-10-24
TW247350B (de) 1995-05-11
US5554937A (en) 1996-09-10
EP0644432A2 (de) 1995-03-22
KR950009271A (ko) 1995-04-21
CA2132225A1 (en) 1995-03-18
AU677087B2 (en) 1997-04-10
EP0644432B1 (de) 2002-01-30
ES2171426T3 (es) 2002-09-16
CA2132225C (en) 1997-12-23
DE69429755T2 (de) 2002-09-26
AU7304294A (en) 1995-03-30

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Legal Events

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties