NO167830C - Fremgangsmaate for maaling av kapasitanser, saerlig lave kapasitanser. - Google Patents

Fremgangsmaate for maaling av kapasitanser, saerlig lave kapasitanser.

Info

Publication number
NO167830C
NO167830C NO852170A NO852170A NO167830C NO 167830 C NO167830 C NO 167830C NO 852170 A NO852170 A NO 852170A NO 852170 A NO852170 A NO 852170A NO 167830 C NO167830 C NO 167830C
Authority
NO
Norway
Prior art keywords
capacitances
procedure
measuring
specifically low
specifically
Prior art date
Application number
NO852170A
Other languages
English (en)
Other versions
NO852170L (no
NO167830B (no
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 NO852170L publication Critical patent/NO852170L/no
Publication of NO167830B publication Critical patent/NO167830B/no
Publication of NO167830C publication Critical patent/NO167830C/no

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)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
NO852170A 1984-05-31 1985-05-30 Fremgangsmaate for maaling av kapasitanser, saerlig lave kapasitanser. NO167830C (no)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
NO852170L NO852170L (no) 1985-12-02
NO167830B NO167830B (no) 1991-09-02
NO167830C true NO167830C (no) 1991-12-11

Family

ID=8519171

Family Applications (1)

Application Number Title Priority Date Filing Date
NO852170A NO167830C (no) 1984-05-31 1985-05-30 Fremgangsmaate for maaling av kapasitanser, saerlig lave kapasitanser.

Country Status (8)

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

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
US5148126A (en) * 1991-12-13 1992-09-15 Sentech Corporation Capacitance sensor circuit and method for measuring capacitance and small changes in capacitance
US5136262A (en) * 1991-12-13 1992-08-04 Sentech Corporation Oscillator 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
JP3840472B2 (ja) * 2001-09-28 2006-11-01 日本特殊陶業株式会社 エンジンオイル劣化検知装置
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 (no) * 1957-10-21
AT359599B (de) * 1977-02-03 1980-11-25 Elin Union Ag Elektronische kapazitaetsmesseinrichtung
SE431683B (sv) * 1977-09-23 1984-02-20 Testut Aequitas Anordning for metning av kapacitansen hos en kondensator
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
EP0166706A1 (en) 1986-01-02
FI842192A0 (fi) 1984-05-31
EP0166706B1 (en) 1989-03-01
DK159298C (da) 1991-02-18
FI842192A (fi) 1985-12-01
NO852170L (no) 1985-12-02
NO167830B (no) 1991-09-02
FI70753C (fi) 1987-01-07
DK159298B (da) 1990-09-24
DK242385A (da) 1985-12-01
CA1268210A (en) 1990-04-24
JPS60262066A (ja) 1985-12-25
FI70753B (fi) 1986-06-26
US4775830A (en) 1988-10-04
DE3568493D1 (en) 1989-04-06
DK242385D0 (da) 1985-05-30

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