KR950009271A - 캐패시턴스 측정 디바이스 - Google Patents

캐패시턴스 측정 디바이스 Download PDF

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Publication number
KR950009271A
KR950009271A KR1019940023565A KR19940023565A KR950009271A KR 950009271 A KR950009271 A KR 950009271A KR 1019940023565 A KR1019940023565 A KR 1019940023565A KR 19940023565 A KR19940023565 A KR 19940023565A KR 950009271 A KR950009271 A KR 950009271A
Authority
KR
South Korea
Prior art keywords
capacitance
charge
discharge
linearly
voltage
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.)
Abandoned
Application number
KR1019940023565A
Other languages
English (en)
Korean (ko)
Inventor
글렌 샌더즈 개리
제이. 굳윈 브라이언
Original Assignee
노만드 엠. 시마드
펜버디, 아이엔씨.
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 노만드 엠. 시마드, 펜버디, 아이엔씨. filed Critical 노만드 엠. 시마드
Publication of KR950009271A publication Critical patent/KR950009271A/ko
Abandoned 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)
  • 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)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Measuring Fluid Pressure (AREA)
KR1019940023565A 1993-09-17 1994-09-16 캐패시턴스 측정 디바이스 Abandoned KR950009271A (ko)

Applications Claiming Priority (2)

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
US93-08/132,316 1993-09-17

Publications (1)

Publication Number Publication Date
KR950009271A true KR950009271A (ko) 1995-04-21

Family

ID=22407936

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940023565A Abandoned KR950009271A (ko) 1993-09-17 1994-09-16 캐패시턴스 측정 디바이스

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)

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US8570053B1 (en) 2007-07-03 2013-10-29 Cypress Semiconductor Corporation Capacitive field sensor with sigma-delta modulator
US7667468B1 (en) * 2007-07-24 2010-02-23 Cypress Semiconductor Corporation Capacitive sensor with ratiometric voltage references
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US8319505B1 (en) 2008-10-24 2012-11-27 Cypress Semiconductor Corporation Methods and circuits for measuring mutual and self capacitance
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US8225654B2 (en) * 2009-07-01 2012-07-24 Tecan Trading Ag Self-compensating capacitive liquid level detector
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TWI448696B (zh) * 2012-07-05 2014-08-11 Chroma Ate Inc 訊號量測裝置
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Also Published As

Publication number Publication date
TW247350B (enExample) 1995-05-11
CN1111355A (zh) 1995-11-08
CA2132225C (en) 1997-12-23
AU7304294A (en) 1995-03-30
AU677087B2 (en) 1997-04-10
ATE212726T1 (de) 2002-02-15
DE69429755T2 (de) 2002-09-26
EP0644432B1 (en) 2002-01-30
EP0644432A2 (en) 1995-03-22
US5554937A (en) 1996-09-10
EP0644432A3 (en) 1996-04-17
DE69429755D1 (de) 2002-03-14
ES2171426T3 (es) 2002-09-16
US5461321A (en) 1995-10-24
CA2132225A1 (en) 1995-03-18

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