FR2451566A1 - Capteur de deplacement a courants de foucault - Google Patents

Capteur de deplacement a courants de foucault

Info

Publication number
FR2451566A1
FR2451566A1 FR7906206A FR7906206A FR2451566A1 FR 2451566 A1 FR2451566 A1 FR 2451566A1 FR 7906206 A FR7906206 A FR 7906206A FR 7906206 A FR7906206 A FR 7906206A FR 2451566 A1 FR2451566 A1 FR 2451566A1
Authority
FR
France
Prior art keywords
coils
resistors
displacement sensor
current displacement
sensor
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
FR7906206A
Other languages
English (en)
Other versions
FR2451566B1 (fr
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.)
EFFA ETUDES SARL
Original Assignee
EFFA ETUDES SARL
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 to FR7906206A priority Critical patent/FR2451566A1/fr
Application filed by EFFA ETUDES SARL filed Critical EFFA ETUDES SARL
Priority to JP50067180A priority patent/JPS56500102A/ja
Priority to US06/224,506 priority patent/US4365517A/en
Priority to DE19803036749 priority patent/DE3036749A1/de
Priority to CH834080A priority patent/CH641896A5/fr
Priority to GB8035570A priority patent/GB2060900B/en
Priority to PCT/FR1980/000034 priority patent/WO1980001951A1/fr
Priority to IT20530/80A priority patent/IT1129630B/it
Priority to ES489454A priority patent/ES489454A1/es
Publication of FR2451566A1 publication Critical patent/FR2451566A1/fr
Application granted granted Critical
Publication of FR2451566B1 publication Critical patent/FR2451566B1/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
    • 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
    • G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
    • G01L9/0036—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means using variations in inductance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils
    • 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
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/007—Transmitting or indicating the displacement of flexible diaphragms using variations in inductance
    • 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
    • G01L9/10—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 inductance, i.e. electric circuits therefor
    • G01L9/105—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 inductance, i.e. electric circuits therefor with temperature compensating means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

CAPTEUR DE PETITS DEPLACEMENTS DE PIECE METALLIQUE A COURANTS DE FOUCAULT. CE CAPTEUR COMPREND DEUX BOBINES1 ET 2 AYANT LE MEME NOMBRE D'AMPERES-TOURS DISPOSEES DANS DEUX DEMI-POTS EN FERRITE 3 ET 4 EN REGARD DE DEUX PIECES METALLIQUES DE MEME NATURE 5 ET 6 DONT L'UNE AU MOINS EST CELLE DONT ON VEUT MESURER LE DEPLACEMENT. UN GENERATEUR BASSE FREQUENCE 9 ALIMENTE D'UN SIGNAL RECTANGULAIRE LES DEUX BOBINES AU TRAVERS DES RESISTANCES 7 ET 8. DEUX CIRCUITS 10 ET 11 DETECTENT LES VALEURS DE CRETES DES SIGNAUX RESULTANTS AUX POINTS COMMUNS ENTRE LES BOBINES ET LEUR RESISTANCE DE CHARGE. UN AMPLIFICATEUR OPERATIONNEL 12 FAIT LA DIFFERENCE DE CES VALEURS DE CRETES. UNE DIODE 13 PERMET LA DECHARGE DES BOBINES A TRAVERS LES RESISTANCES 7 ET 8. APPLICATIONS AUX CAPTEURS DE PRESSION DIFFERENTIELLE, BALANCES DE PRECISION, MESUREURS DE NIVEAUX LIQUIDES.
FR7906206A 1979-03-12 1979-03-12 Capteur de deplacement a courants de foucault Granted FR2451566A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR7906206A FR2451566A1 (fr) 1979-03-12 1979-03-12 Capteur de deplacement a courants de foucault
US06/224,506 US4365517A (en) 1979-03-12 1980-03-11 Linear differential foucault current detector serving for measuring small displacements of a metallic element
DE19803036749 DE3036749A1 (de) 1979-03-12 1980-03-11 Linear differential sensor of the foucault current type used to measure short displacements of a metal piece
CH834080A CH641896A5 (fr) 1979-03-12 1980-03-11 Capteur servant a mesurer les deplacements d'une piece en metal non ferro-magnetique.
JP50067180A JPS56500102A (fr) 1979-03-12 1980-03-11
GB8035570A GB2060900B (en) 1979-03-12 1980-03-11 Linear differential sensor of the foucault current type used to measure short displacements of a metal piece
PCT/FR1980/000034 WO1980001951A1 (fr) 1979-03-12 1980-03-11 Capteur differentiel lineaire a courants de foucault servant a mesurer les petits deplacements d'une piece metallique
IT20530/80A IT1129630B (it) 1979-03-12 1980-03-12 Sensore differenziale lineare a correnti di foucault atto a misurare i piccoli spostamenti di un corpo metallico
ES489454A ES489454A1 (es) 1979-03-12 1980-03-12 Perfeccionamientos en captadores de desplazamiento

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7906206A FR2451566A1 (fr) 1979-03-12 1979-03-12 Capteur de deplacement a courants de foucault

Publications (2)

Publication Number Publication Date
FR2451566A1 true FR2451566A1 (fr) 1980-10-10
FR2451566B1 FR2451566B1 (fr) 1984-10-19

Family

ID=9223003

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906206A Granted FR2451566A1 (fr) 1979-03-12 1979-03-12 Capteur de deplacement a courants de foucault

Country Status (8)

Country Link
US (1) US4365517A (fr)
JP (1) JPS56500102A (fr)
CH (1) CH641896A5 (fr)
ES (1) ES489454A1 (fr)
FR (1) FR2451566A1 (fr)
GB (1) GB2060900B (fr)
IT (1) IT1129630B (fr)
WO (1) WO1980001951A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1138465B (it) * 1981-07-29 1986-09-17 Kent Tieghi Spa Trasmettitore elettronico di valori di pressione di fluidi di processi industriali
CA1181256A (fr) * 1981-10-05 1985-01-22 Combustion Engineering, Inc. Pont pour circuit de detection reactif
US5490424A (en) * 1993-03-09 1996-02-13 Matsushita Electric Industrial Co., Ltd. Pressure sensor with moisture resistance and uniform characteristics
DE19630015A1 (de) * 1996-07-25 1998-01-29 Daimler Benz Ag Vorrichtung zur berührungsfreien elektrischen Messung des Reifendruckes an einem umlaufenden Reifen, insbesondere bei Kraftfahrzeugen
US6667615B2 (en) 2000-02-10 2003-12-23 Sankyo Seiki Mfg. Co., Ltd. Coin identifying device using magnetic sensors
US6960911B2 (en) * 2002-01-29 2005-11-01 Kabushiki Kaisha Toshiba Strain sensor
DE102012202639A1 (de) * 2012-02-21 2013-08-22 Robert Bosch Gmbh Sensoranordnung zur Erfassung von Drehwinkeln an einem rotierenden Bauteil in einem Fahrzeug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1427236A (fr) * 1964-12-31 1966-02-04 Kaman Aircraft Corp Perfectionnements apportés aux transducteurs, notamment du type fonctionnant par courants de foucault
DE1903051A1 (de) * 1969-01-22 1970-08-13 Perthen Dr Ing Johannes Elektronisches Laengenmessgeraet
DE2724064A1 (de) * 1977-05-27 1978-11-30 Messerschmitt Boelkow Blohm Induktiver winkelgeber

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959962A (en) * 1957-10-02 1960-11-15 Epstein Saul Electromagnetic fluid pressure responsive device
US3336525A (en) * 1963-01-08 1967-08-15 Kaman Aircraft Corp Variable impedance displacement transducer
JPS587182B2 (ja) * 1974-03-08 1983-02-08 横河電機株式会社 サアツオウドウソウチ
SU509800A1 (ru) * 1974-12-03 1976-04-05 Подмосковный Государственныйпроектно-Конструкторский И Экспери-Ментальный Институт Горного Машиностроения Устройство дл измерени давлени
IT1088352B (it) * 1977-10-12 1985-06-10 Magneti Marelli Spa Rilevatore di spostamenti lineari

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1427236A (fr) * 1964-12-31 1966-02-04 Kaman Aircraft Corp Perfectionnements apportés aux transducteurs, notamment du type fonctionnant par courants de foucault
DE1903051A1 (de) * 1969-01-22 1970-08-13 Perthen Dr Ing Johannes Elektronisches Laengenmessgeraet
DE2724064A1 (de) * 1977-05-27 1978-11-30 Messerschmitt Boelkow Blohm Induktiver winkelgeber

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *

Also Published As

Publication number Publication date
IT8020530A0 (it) 1980-03-12
FR2451566B1 (fr) 1984-10-19
US4365517A (en) 1982-12-28
IT1129630B (it) 1986-06-11
GB2060900A (en) 1981-05-07
GB2060900B (en) 1983-10-05
ES489454A1 (es) 1980-09-16
CH641896A5 (fr) 1984-03-15
WO1980001951A1 (fr) 1980-09-18
JPS56500102A (fr) 1981-02-05

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