FR2410280A1 - LOW CAPACITY MEASUREMENT PROCESS - Google Patents

LOW CAPACITY MEASUREMENT PROCESS

Info

Publication number
FR2410280A1
FR2410280A1 FR7829343A FR7829343A FR2410280A1 FR 2410280 A1 FR2410280 A1 FR 2410280A1 FR 7829343 A FR7829343 A FR 7829343A FR 7829343 A FR7829343 A FR 7829343A FR 2410280 A1 FR2410280 A1 FR 2410280A1
Authority
FR
France
Prior art keywords
capacities
measurement process
low capacity
capacity measurement
capacity
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.)
Granted
Application number
FR7829343A
Other languages
French (fr)
Other versions
FR2410280B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaisala Oy
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 FR2410280A1 publication Critical patent/FR2410280A1/en
Application granted granted Critical
Publication of FR2410280B1 publication Critical patent/FR2410280B1/fr
Granted 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
    • G01R27/2605—Measuring capacitance

Abstract

PROCEDE DE MESURE DE CAPACITES DE FAIBLE VALEUR C AVEC ELIMINATION DE L'INFLUENCE DE CAPACITES PARASITES C, LEDIT PROCEDE UTILISANT UN CIRCUIT OSCILLANT A RESISTANCES ET CAPACITES DONT LA FREQUENCE DE SORTIE F DEPEND, DE PREFERENCE DE MANIERE INVERSEMENT PROPORTIONNELLE, DE LA CAPACITE MESUREE C. LA CAPACITE MESUREE C EST CONNECTEE ENTRE UN GENERATEUR A FAIBLE IMPEDANCE ET UN CIRCUIT MESURANT SEULEMENT LE COURANT, PAR EXEMPLE ENTRE L'ENTREE A ET LA SORTIE B D'UN AMPLIFICATEUR INVERSEUR 1. PRINCIPALES APPLICATIONS: TELEMETRIE.PROCESS FOR MEASURING LOW-VALUE CAPACITIES C WITH ELIMINATION OF THE INFLUENCE OF PARASITIC CAPACITIES C, THESE METHOD USING AN OSCILLATING CIRCUIT WITH RESISTORS AND CAPACITIES IN WHICH THE OUTPUT FREQUENCY F DEPEND, PREFERABLY IN AN INVERSE-PROPORTIONAL MEASURE OF THE CAPACITY, OF THE C THE MEASURED CAPACITY C IS CONNECTED BETWEEN A LOW IMPEDANCE GENERATOR AND A CIRCUIT MEASURING CURRENT ONLY, FOR EXAMPLE BETWEEN INPUT A AND OUTPUT B OF AN INVERTER 1 AMPLIFIER. MAIN APPLICATIONS: TELEMETRY.

FR7829343A 1977-10-14 1978-10-13 LOW CAPACITY MEASUREMENT PROCESS Granted FR2410280A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI773063A FI57319C (en) 1977-10-14 1977-10-14 ADJUSTMENT OF CAPACITY IN CAPACITY

Publications (2)

Publication Number Publication Date
FR2410280A1 true FR2410280A1 (en) 1979-06-22
FR2410280B1 FR2410280B1 (en) 1984-01-06

Family

ID=8511140

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7829343A Granted FR2410280A1 (en) 1977-10-14 1978-10-13 LOW CAPACITY MEASUREMENT PROCESS

Country Status (10)

Country Link
JP (2) JPS5498696A (en)
AU (1) AU523345B2 (en)
BR (1) BR7806786A (en)
CA (1) CA1128129A (en)
DE (1) DE2844121C2 (en)
FI (1) FI57319C (en)
FR (1) FR2410280A1 (en)
GB (1) GB2006442B (en)
IT (1) IT1100121B (en)
ZA (1) ZA785694B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033705A2 (en) * 1980-02-04 1981-08-12 Testut-Aequitas Capacitance measuring device for a weighing apparatus

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56166411A (en) * 1980-05-27 1981-12-21 Yokogawa Hokushin Electric Corp Capacity type displacement transducer
DE3117808A1 (en) * 1981-05-06 1982-11-25 Robert Bosch Gmbh, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR MEASURING INDUCTIVE CHANGES
DK4383A (en) * 1983-01-07 1984-07-08 Nils Aage Juul Eilersen oscillator circuit
FI69932C (en) * 1984-05-31 1986-05-26 Vaisala Oy MAINTENANCE FOUNDATION CAPACITORS SPECIFIC FOR SMAR CAPACITORS VID VILKER MAN ANVAENDER TVAO REFERENSER
JPS6114578A (en) * 1984-06-30 1986-01-22 Suzuki Shigeo Capacity meter
FI74549C (en) * 1986-02-13 1988-02-08 Vaisala Oy MAETNINGSFOERFARANDE FOER IMPEDANSER, SAERSKILT SMAO KAPACITANSER.
DE4039006C1 (en) * 1990-12-06 1992-03-12 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
JP2007187509A (en) 2006-01-12 2007-07-26 Denso Corp Physical quantity sensor of capacitance type
US8604809B2 (en) 2008-11-02 2013-12-10 Siemens Aktiengesellschaft Current sensor capacity measuring system
FR2977950B1 (en) * 2011-07-13 2014-11-07 Jean Noel Lefebvre CAPACITIVE DETECTION DEVICE

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805149A (en) * 1971-06-24 1974-04-16 Commissariat Energie Atomique Method of linear measurement of a variation in capacitance and corresponding digital-display device
US3896374A (en) * 1972-11-29 1975-07-22 Commissariat Energie Atomique Method of analog measurement of a capacitance and a capacitance meter for carrying out said method
US4083248A (en) * 1975-09-04 1978-04-11 Simmonds Precision Products, Inc. Digital liquid-level gauging systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3518537A (en) * 1967-11-28 1970-06-30 Richard Mcfee Apparatus and method for determining the capacitance and conductance of capacitors
US3626287A (en) * 1969-02-10 1971-12-07 C G I Corp System for responding to changes in capacitance of a sensing capacitor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805149A (en) * 1971-06-24 1974-04-16 Commissariat Energie Atomique Method of linear measurement of a variation in capacitance and corresponding digital-display device
US3896374A (en) * 1972-11-29 1975-07-22 Commissariat Energie Atomique Method of analog measurement of a capacitance and a capacitance meter for carrying out said method
US4083248A (en) * 1975-09-04 1978-04-11 Simmonds Precision Products, Inc. Digital liquid-level gauging systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/77 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033705A2 (en) * 1980-02-04 1981-08-12 Testut-Aequitas Capacitance measuring device for a weighing apparatus
EP0033705B1 (en) * 1980-02-04 1986-04-30 Testut-Aequitas Capacitance measuring device for a weighing apparatus

Also Published As

Publication number Publication date
AU523345B2 (en) 1982-07-22
FI773063A (en) 1979-04-15
BR7806786A (en) 1979-05-15
DE2844121C2 (en) 1981-09-24
FI57319B (en) 1980-03-31
ZA785694B (en) 1979-09-26
JPS62201074U (en) 1987-12-22
JPS5498696A (en) 1979-08-03
GB2006442A (en) 1979-05-02
IT1100121B (en) 1985-09-28
GB2006442B (en) 1982-04-28
AU4067578A (en) 1980-04-17
IT7828692A0 (en) 1978-10-12
FI57319C (en) 1980-07-10
JPH056544Y2 (en) 1993-02-19
DE2844121A1 (en) 1979-04-19
CA1128129A (en) 1982-07-20
FR2410280B1 (en) 1984-01-06

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Legal Events

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ST Notification of lapse