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

Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier Download PDF

Info

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
DK159298C (da
DK159298B (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)
  • 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)
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
FI842192 1984-05-31
FI842192A FI70753C (fi) 1984-05-31 1984-05-31 Foerfarande foer maetning av kapacitanser, speciellt smao kapacitanser.

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
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 (da) * 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
CA1268210A (en) 1990-04-24
JPS60262066A (ja) 1985-12-25
NO167830C (no) 1991-12-11
FI70753B (fi) 1986-06-26
US4775830A (en) 1988-10-04
DE3568493D1 (en) 1989-04-06
DK242385D0 (da) 1985-05-30

Similar Documents

Publication Publication Date Title
DK160374C (da) Fremgangsmaade og apparat til niveaumaaling
DK161261C (da) Fremgangsmaade og apparat til niveaumaaling
DK418485A (da) Fremgangsmaade og apparat til kalibrering
DK163380C (da) Apparat til maaling af vaeskeniveau og vaeskemaengde
DK208585A (da) Apparat og fremgangsmaade til elektrisk kapacitetsmaaling
DK159129C (da) Apparat og fremgangsmaade til hoestning af afgroeder
DK475683A (da) Fremgangsmaade og apparat til indirekte forskydningsboelgebestemmelse
DK341981A (da) Fremgangsmaade og apparat til processtyring
DK159298C (da) Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier
DK366585D0 (da) Fremgangsmaade og apparat til maaling af afstandsvariationer
DK392385A (da) Fremgangsmaade og apparat til maaling af lydboelgers forvraengning
DK189785D0 (da) Fremgangsmaade og apparat til frembringelse af adskilte elementer sammensat af baandlaengder
DK149385D0 (da) Apparat og fremgangsmaade til fremstilling af ispinde
DK327084D0 (da) Fremgangsmaade og apparat til bestemmelse af tyngdekrafts variationer i borehuller
DK430584A (da) Fremgangsmaade og apparat til plukning af fjerkrae
DK165078C (da) Fremgangsmaade og apparat til maaling af risledygtigt materiale
DK242285D0 (da) Fremgangsmaade og apparat til maaling af navnlig lave kapacitetsvaerdier
DK452081A (da) Fremgangsmaade og apparat til elektrocoating
NO851651L (no) Framgangsmaate og apparat for trekking av forbindelsesroer
DK604686D0 (da) Fremgangsmaade og apparat til bestemmelse af straemningshastighed
DK86586D0 (da) Fremgangsmaade og apparatur til beroeringsfri detektering af vaekster
DK318283A (da) Inddampningsfremgangsmaade og apparat
DK158602C (da) Fremgangsmaade og apparat til at rette langstrakte traeelementer op
DK474981A (da) Fremgangsmaade og apparat til dispergerning
DK249783D0 (da) Fremgangsmade og apparat til oprulning og emballering af langstrakte emnelag

Legal Events

Date Code Title Description
PUP Patent expired