DK242385A - Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier - Google Patents

Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier Download PDF

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Publication number
DK242385A
DK242385A DK242385A DK242385A DK242385A DK 242385 A DK242385 A DK 242385A DK 242385 A DK242385 A DK 242385A DK 242385 A DK242385 A DK 242385A DK 242385 A DK242385 A DK 242385A
Authority
DK
Denmark
Prior art keywords
publicly
procedure
measuring
low capacity
capacity values
Prior art date
Application number
DK242385A
Other languages
English (en)
Other versions
DK159298B (da
DK159298C (da
DK242385D0 (da
Inventor
Matti Lyyra
Original Assignee
Vaisala Oy
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 Vaisala Oy filed Critical Vaisala Oy
Publication of DK242385D0 publication Critical patent/DK242385D0/da
Publication of DK242385A publication Critical patent/DK242385A/da
Publication of DK159298B publication Critical patent/DK159298B/da
Application granted granted Critical
Publication of DK159298C publication Critical patent/DK159298C/da

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
    • G01R27/2605—Measuring capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
DK242385A 1984-05-31 1985-05-30 Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier DK159298C (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI842192A FI70753C (fi) 1984-05-31 1984-05-31 Foerfarande foer maetning av kapacitanser, speciellt smao kapacitanser.
FI842192 1984-05-31

Publications (4)

Publication Number Publication Date
DK242385D0 DK242385D0 (da) 1985-05-30
DK242385A true DK242385A (da) 1985-12-01
DK159298B DK159298B (da) 1990-09-24
DK159298C DK159298C (da) 1991-02-18

Family

ID=8519171

Family Applications (1)

Application Number Title Priority Date Filing Date
DK242385A DK159298C (da) 1984-05-31 1985-05-30 Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier

Country Status (8)

Country Link
US (1) US4775830A (da)
EP (1) EP0166706B1 (da)
JP (1) JPS60262066A (da)
CA (1) CA1268210A (da)
DE (1) DE3568493D1 (da)
DK (1) DK159298C (da)
FI (1) FI70753C (da)
NO (1) NO167830C (da)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794320A (en) * 1987-08-10 1988-12-27 Moore Products Co. Multi-frequency capacitance sensor
US5136251A (en) * 1988-09-23 1992-08-04 John Fluke Mfg. Co., Inc. Capacitance measurement
US5028876A (en) * 1989-01-30 1991-07-02 Dresser Industries, Inc. Precision capacitive transducer circuits and methods
US5042299A (en) * 1990-07-23 1991-08-27 Iimorrow, Inc. Capacitive fluid level sensor
US5202640A (en) * 1991-06-03 1993-04-13 International Business Machines Corporation Capacitance and leakage test method and apparatus
US5136262A (en) * 1991-12-13 1992-08-04 Sentech Corporation Oscillator circuit and method for measuring capacitance and small changes in capacitance
US5148126A (en) * 1991-12-13 1992-09-15 Sentech Corporation Capacitance sensor circuit and method for measuring capacitance and small changes in capacitance
DE19524387C1 (de) * 1995-07-04 1996-11-07 Siemens Ag Schaltungsanordnung und Verfahren zum Messen eines Kapazitätsunterschiedes zwischen einer ersten Kapazität C1 und einer zweiten Kapazität C2
US6008660A (en) * 1996-08-22 1999-12-28 International Business Machines Corporation Method for developing circuit capacitance measurements corrected for stray capacitance
WO2003029802A1 (en) * 2001-09-28 2003-04-10 Ngk Spark Plug Co., Ltd. Oil deterioration sensor
US20040246007A1 (en) * 2003-06-03 2004-12-09 Wolfgang Fallot-Burghardt Fast, high precision, interference tolerant impedance measurement apparatus
JP4713852B2 (ja) * 2003-08-28 2011-06-29 ルネサスエレクトロニクス株式会社 周波数発生回路及びそれを用いた通信システム
DE102008063527A1 (de) 2008-12-18 2010-07-01 Micro-Epsilon Messtechnik Gmbh & Co. Kg Schaltungsanordnung und Verfahren zum Auswerten eines Sensors
DE102017205908B4 (de) 2017-04-06 2019-04-04 Marius Czardybon Auswerteschaltung, System und Verfahren zum Auswerten eines kapazitiven oder induktiven Sensors

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE567800A (da) * 1957-10-21
AT359599B (de) * 1977-02-03 1980-11-25 Elin Union Ag Elektronische kapazitaetsmesseinrichtung
GB2006970B (en) * 1977-09-23 1982-03-31 Testut Aequitas Capacitance measuring device
FI54664C (fi) * 1977-10-14 1979-01-10 Vaisala Oy Elektronisk omkopplingstroemstaellare i synnerhet foer telemeteranvaendning i sonder
US4295091B1 (en) * 1978-10-12 1995-08-15 Vaisala Oy Circuit for measuring low capacitances
FR2454083A1 (fr) * 1979-04-09 1980-11-07 Facom Dispositif de mesure de la position relative de deux objets
GB2058364B (en) * 1979-09-01 1983-03-23 Ferranti Ltd Capacitance measuring apparatus
JPS57199914A (en) * 1981-06-03 1982-12-08 Yokogawa Hokushin Electric Corp Capacity type converter
US4580233A (en) * 1982-09-22 1986-04-01 Weyerhaeuser Company Method of measuring moisture content of dielectric materials

Also Published As

Publication number Publication date
FI70753B (fi) 1986-06-26
NO852170L (no) 1985-12-02
DE3568493D1 (en) 1989-04-06
JPS60262066A (ja) 1985-12-25
US4775830A (en) 1988-10-04
CA1268210A (en) 1990-04-24
EP0166706A1 (en) 1986-01-02
DK159298B (da) 1990-09-24
FI842192A (fi) 1985-12-01
FI70753C (fi) 1987-01-07
DK159298C (da) 1991-02-18
NO167830B (no) 1991-09-02
NO167830C (no) 1991-12-11
FI842192A0 (fi) 1984-05-31
EP0166706B1 (en) 1989-03-01
DK242385D0 (da) 1985-05-30

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PUP Patent expired