FR2375603A1 - ELECTRONIC CIRCUIT FOR MEASURING THE DIFFERENCE IN CAPACITIES OF TWO CAPACITORS - Google Patents

ELECTRONIC CIRCUIT FOR MEASURING THE DIFFERENCE IN CAPACITIES OF TWO CAPACITORS

Info

Publication number
FR2375603A1
FR2375603A1 FR7803682A FR7803682A FR2375603A1 FR 2375603 A1 FR2375603 A1 FR 2375603A1 FR 7803682 A FR7803682 A FR 7803682A FR 7803682 A FR7803682 A FR 7803682A FR 2375603 A1 FR2375603 A1 FR 2375603A1
Authority
FR
France
Prior art keywords
capacitors
difference
measuring
electronic circuit
capacities
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
FR7803682A
Other languages
French (fr)
Other versions
FR2375603B1 (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.)
Sundstrand Data Control Inc
Original Assignee
Sundstrand Data Control Inc
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
Priority claimed from US05/702,382 external-priority patent/US4131020A/en
Priority claimed from US05/702,389 external-priority patent/US4206400A/en
Priority claimed from US05/702,781 external-priority patent/US4094199A/en
Application filed by Sundstrand Data Control Inc filed Critical Sundstrand Data Control Inc
Publication of FR2375603A1 publication Critical patent/FR2375603A1/en
Application granted granted Critical
Publication of FR2375603B1 publication Critical patent/FR2375603B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/13—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by measuring the force required to restore a proofmass subjected to inertial forces to a null position
    • G01P15/132—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by measuring the force required to restore a proofmass subjected to inertial forces to a null position with electromagnetic counterbalancing means

Abstract

L'invention concerne un circuit électronique de mesure de la différence de capacités de deux condensateurs. Ce circuit comporte un circuit pilote 204 relié aux condensateurs C 1 et C2 et leur appliquant une tension variable produite par un oscillateur 216, de manière à produire des courants IC1 et IC2 dans les condensateurs. Un circuit détecteur 230 mesure ces courants et produit un signal de référence ID représentatif de la différence de capacités des deux condensateurs. Application aux accéléromètres.The invention relates to an electronic circuit for measuring the difference in capacitance of two capacitors. This circuit comprises a pilot circuit 204 connected to the capacitors C 1 and C2 and applying to them a variable voltage produced by an oscillator 216, so as to produce currents IC1 and IC2 in the capacitors. A detector circuit 230 measures these currents and produces a reference signal ID representative of the difference in capacitances of the two capacitors. Application to accelerometers.

FR7803682A 1976-07-06 1978-02-09 ELECTRONIC CIRCUIT FOR MEASURING THE DIFFERENCE IN CAPACITIES OF TWO CAPACITORS Granted FR2375603A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/702,382 US4131020A (en) 1976-07-06 1976-07-06 Accelerometer
US05/702,389 US4206400A (en) 1976-07-06 1976-07-06 Accelerometer
US05/702,781 US4094199A (en) 1976-07-06 1976-07-06 Accelerometer

Publications (2)

Publication Number Publication Date
FR2375603A1 true FR2375603A1 (en) 1978-07-21
FR2375603B1 FR2375603B1 (en) 1980-08-29

Family

ID=27418740

Family Applications (2)

Application Number Title Priority Date Filing Date
FR7720669A Granted FR2375600A1 (en) 1976-07-06 1977-07-05 SLAVE ACCELEROMETER
FR7803682A Granted FR2375603A1 (en) 1976-07-06 1978-02-09 ELECTRONIC CIRCUIT FOR MEASURING THE DIFFERENCE IN CAPACITIES OF TWO CAPACITORS

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR7720669A Granted FR2375600A1 (en) 1976-07-06 1977-07-05 SLAVE ACCELEROMETER

Country Status (9)

Country Link
JP (2) JPS6016581B2 (en)
AU (1) AU504091B2 (en)
DE (3) DE2759500C2 (en)
FR (2) FR2375600A1 (en)
GB (3) GB1555282A (en)
IT (1) IT1079895B (en)
NO (2) NO146412C (en)
PL (1) PL126426B1 (en)
SE (1) SE435552B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165483A (en) * 1978-01-31 1979-08-21 Sundstrand Data Control, Inc. Capacitive pick-off circuit
US4167697A (en) * 1978-02-10 1979-09-11 Sundstrand Data Control, Inc. Capacitive pick-off circuit
US4441366A (en) * 1981-07-14 1984-04-10 Sundstrand Data Control, Inc. Flexure with electrical conductor
JPS5890174A (en) * 1981-11-25 1983-05-28 Tokyo Keiki Co Ltd Accelerometer
JPS59196633U (en) * 1983-06-15 1984-12-27 三菱重工業株式会社 scaffolding equipment
JPS60205370A (en) * 1984-03-30 1985-10-16 Tokyo Keiki Co Ltd Accelerometer
JPS6117959A (en) * 1984-07-05 1986-01-25 Japan Aviation Electronics Ind Ltd Accelerometer
JPS638565A (en) * 1986-06-27 1988-01-14 Mitsubishi Electric Corp Semiconductor acceleration detector
GB2222680B (en) * 1988-03-15 1991-09-11 Baroid Technology Inc Accelerometers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2006296A1 (en) * 1968-04-16 1969-12-26 Lucas Industries Ltd
DE2164321A1 (en) * 1971-12-23 1973-07-05 Sundstrand Corp TRANSMITTER

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995935A (en) * 1948-11-01 1961-08-15 North American Aviation Inc Accelerometer
US3209601A (en) 1962-08-16 1965-10-05 Gen Precision Inc Quartz accelerometer
US3213692A (en) * 1963-01-10 1965-10-26 Litton Systems Inc Cylindrical torque balance accelerometers
US3339419A (en) * 1964-07-02 1967-09-05 North American Aviation Inc Accelerometer
JPS4020359Y1 (en) * 1964-07-11 1965-07-15
JPS4415398Y1 (en) * 1968-11-20 1969-07-03
US3618401A (en) 1969-08-25 1971-11-09 Litton Systems Inc Accelerometer
US3641414A (en) 1970-10-16 1972-02-08 United Control Corp Transducer system with floating input circuit and constant current output electronics
US3797321A (en) 1972-05-08 1974-03-19 Systron Donner Corp Pivot mechanism with electronic dither circuit
US3897690A (en) * 1973-01-15 1975-08-05 Systron Donner Corp Miniature inertial grade high shock and vibration capability accelerometer and method with axis alignment and stability features
US3948107A (en) 1973-07-31 1976-04-06 Systron Donner Corporation Velocity transducer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2006296A1 (en) * 1968-04-16 1969-12-26 Lucas Industries Ltd
DE2164321A1 (en) * 1971-12-23 1973-07-05 Sundstrand Corp TRANSMITTER

Also Published As

Publication number Publication date
FR2375603B1 (en) 1980-08-29
JPS6016581B2 (en) 1985-04-26
JPS536082A (en) 1978-01-20
PL126426B1 (en) 1983-08-31
DE2723244B2 (en) 1980-12-11
PL199415A1 (en) 1978-02-13
NO146412B (en) 1982-06-14
GB1555281A (en) 1979-11-07
AU504091B2 (en) 1979-10-04
NO772177L (en) 1978-01-09
DE2759499C2 (en) 1984-10-11
SE435552B (en) 1984-10-01
AU2248777A (en) 1978-08-31
IT1079895B (en) 1985-05-13
SE7706979L (en) 1978-01-07
DE2723244C3 (en) 1981-08-13
DE2759500C2 (en) 1986-01-16
DE2723244A1 (en) 1978-01-12
JPS6372561U (en) 1988-05-14
GB1555282A (en) 1979-11-07
NO814342L (en) 1978-01-09
NO146412C (en) 1982-09-22
GB1555283A (en) 1979-11-07
FR2375600B1 (en) 1980-04-25
FR2375600A1 (en) 1978-07-21

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Legal Events

Date Code Title Description
ST Notification of lapse