FR2267620A1 - Linear displacement capacitive transducer - has four tubular in-line bodies around mobile capacitor shaft - Google Patents

Linear displacement capacitive transducer - has four tubular in-line bodies around mobile capacitor shaft

Info

Publication number
FR2267620A1
FR2267620A1 FR7412785A FR7412785A FR2267620A1 FR 2267620 A1 FR2267620 A1 FR 2267620A1 FR 7412785 A FR7412785 A FR 7412785A FR 7412785 A FR7412785 A FR 7412785A FR 2267620 A1 FR2267620 A1 FR 2267620A1
Authority
FR
France
Prior art keywords
armatures
tubular
linear displacement
shaft
capacitive transducer
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
FR7412785A
Other languages
French (fr)
Other versions
FR2267620B1 (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.)
HERVE MARCEL FR
Original Assignee
HERVE MARCEL FR
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 HERVE MARCEL FR filed Critical HERVE MARCEL FR
Priority to FR7412785A priority Critical patent/FR2267620A1/en
Publication of FR2267620A1 publication Critical patent/FR2267620A1/en
Application granted granted Critical
Publication of FR2267620B1 publication Critical patent/FR2267620B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0005—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using variations in capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
    • 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
    • G01P15/125—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 capacitive pick-up

Abstract

The transducer is used for detection, measurement and recording. IT has four simultaneously variable capacitors connected as a bridge circuit and has two fixed output capacitors. The capacitors are made-up of fixed armatures (1a, 5a, 2a, 6a, 1'a), which are cylindrical and mounted in-line on an insulating fixed support (7), containing two moving armatures (3a, 4a) insulated from each other and fixed on a shaft (8) which can slide in two bearings (10). The whole is mounted in a protecting case (10). For an axial displacement of the shaft (8) the capacitances between the moving armatures (3a, 4a) and the end and middle armatures (1a, 5a, 1'a) vary according to the displacement but the capacitances between the moving armatures and the intermediate armatures (5a, 6a) remain constant.
FR7412785A 1974-04-11 1974-04-11 Linear displacement capacitive transducer - has four tubular in-line bodies around mobile capacitor shaft Granted FR2267620A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7412785A FR2267620A1 (en) 1974-04-11 1974-04-11 Linear displacement capacitive transducer - has four tubular in-line bodies around mobile capacitor shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7412785A FR2267620A1 (en) 1974-04-11 1974-04-11 Linear displacement capacitive transducer - has four tubular in-line bodies around mobile capacitor shaft

Publications (2)

Publication Number Publication Date
FR2267620A1 true FR2267620A1 (en) 1975-11-07
FR2267620B1 FR2267620B1 (en) 1980-05-23

Family

ID=9137547

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7412785A Granted FR2267620A1 (en) 1974-04-11 1974-04-11 Linear displacement capacitive transducer - has four tubular in-line bodies around mobile capacitor shaft

Country Status (1)

Country Link
FR (1) FR2267620A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477707A1 (en) * 1980-03-07 1981-09-11 Fiat Ricerche TRANSMITTER WITH SIX DEGREES OF FREEDOM FOR CONVERTING STRENGTHS AND COUPLES IN ELECTRICAL SIGNALS
US4837500A (en) * 1988-04-08 1989-06-06 Schut's Im- & Exporthandel B.V. Capacitive displacement meter or transducer
DE19751661A1 (en) * 1997-11-21 1999-05-27 Daimler Chrysler Ag Lift measurement arrangement for valve element
CN107505069A (en) * 2017-10-17 2017-12-22 河北工业大学 A kind of pressure detecting system based on capacitive displacement transducer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477707A1 (en) * 1980-03-07 1981-09-11 Fiat Ricerche TRANSMITTER WITH SIX DEGREES OF FREEDOM FOR CONVERTING STRENGTHS AND COUPLES IN ELECTRICAL SIGNALS
US4837500A (en) * 1988-04-08 1989-06-06 Schut's Im- & Exporthandel B.V. Capacitive displacement meter or transducer
EP0336022A1 (en) * 1988-04-08 1989-10-11 SCHUT'S IM- & EXPORTHANDEL B.V. Capacitive displacement meter
DE19751661A1 (en) * 1997-11-21 1999-05-27 Daimler Chrysler Ag Lift measurement arrangement for valve element
US6057692A (en) * 1997-11-21 2000-05-02 Daimler Chrysler Ag Measuring arrangement for determining the lift of a valve member
DE19751661C2 (en) * 1997-11-21 2000-08-03 Daimler Chrysler Ag Capacitive measuring device
CN107505069A (en) * 2017-10-17 2017-12-22 河北工业大学 A kind of pressure detecting system based on capacitive displacement transducer
CN107505069B (en) * 2017-10-17 2023-06-09 河北工业大学 Pressure detection system based on capacitive displacement sensor

Also Published As

Publication number Publication date
FR2267620B1 (en) 1980-05-23

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Legal Events

Date Code Title Description
ST Notification of lapse