FR2419506A1 - Codeur rotatif magnetique pour la detection des valeurs absolues d'un deplacement angulaire - Google Patents

Codeur rotatif magnetique pour la detection des valeurs absolues d'un deplacement angulaire

Info

Publication number
FR2419506A1
FR2419506A1 FR7905673A FR7905673A FR2419506A1 FR 2419506 A1 FR2419506 A1 FR 2419506A1 FR 7905673 A FR7905673 A FR 7905673A FR 7905673 A FR7905673 A FR 7905673A FR 2419506 A1 FR2419506 A1 FR 2419506A1
Authority
FR
France
Prior art keywords
magnetic
rotary encoder
rotation
tracks
detection
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
FR7905673A
Other languages
English (en)
Other versions
FR2419506B1 (fr
Inventor
Susumu Ito
Kaoru Toki
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of FR2419506A1 publication Critical patent/FR2419506A1/fr
Application granted granted Critical
Publication of FR2419506B1 publication Critical patent/FR2419506B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/142—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 using Hall-effect devices
    • G01D5/145—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 using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type
    • H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
    • H03M1/26—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with weighted coding, i.e. the weight given to a digit depends on the position of the digit within the block or code word, e.g. there is a given radix and the weights are powers of this radix

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

Codeur rotatif magnétique pour la détection des valeurs absolues d'un déplacement angulaire, de la vitesse angulaire d'un arbre tournant fixé à, par exemple, un moteur ou à un engrenage. Le codeur rotatif magnétique selon la présente invention comprend un premier moyen fixé à un arbre tournant, plusieurs seconds moyens retenant chacun un signal magnétique, ces seconds moyens étant prévus sur le premier moyen de façon à constituer plus de deux pistes sensiblement parallèles à la circonférence du premier moyen, ces pistes produisant respectivement des champs magnétiques dont l'amplitude et/ou la direction varient pendant la rotation du premier moyen; plusieurs ferro-magnétorésistances fixées dans le voisinage des trajets tournants des pistes et produisant des signaux analogiques représentatifs des variations de leur résistance électrique; et un détecteur des conditions de rotation connecté électriquement aux magnétorésistances recevant les signaux analogiques et produisant des signaux numériques et/ou un signal analogique représentatifs de la distance angulaire de rotation du premier moyen en valeur absolue. Application aux tachymètres magnétiques.
FR7905673A 1978-03-06 1979-03-05 Codeur rotatif magnetique pour la detection des valeurs absolues d'un deplacement angulaire Expired FR2419506B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2581878A JPS54118259A (en) 1978-03-06 1978-03-06 Angle detector

Publications (2)

Publication Number Publication Date
FR2419506A1 true FR2419506A1 (fr) 1979-10-05
FR2419506B1 FR2419506B1 (fr) 1985-10-04

Family

ID=12176438

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7905673A Expired FR2419506B1 (fr) 1978-03-06 1979-03-05 Codeur rotatif magnetique pour la detection des valeurs absolues d'un deplacement angulaire

Country Status (6)

Country Link
US (1) US4274053A (fr)
JP (1) JPS54118259A (fr)
CA (1) CA1136240A (fr)
DE (1) DE2908599A1 (fr)
FR (1) FR2419506B1 (fr)
GB (1) GB2016144B (fr)

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FR2418442A1 (fr) * 1978-02-28 1979-09-21 Nippon Electric Co Codeur rotatif magnetique pour la detection de deplacements angulaires a increment

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FR2296855A1 (fr) * 1974-07-26 1976-07-30 Sony Corp Dispositif magnetosensible
FR2418442A1 (fr) * 1978-02-28 1979-09-21 Nippon Electric Co Codeur rotatif magnetique pour la detection de deplacements angulaires a increment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2495764A1 (fr) * 1980-12-10 1982-06-11 Alpia Sa Appareil de mesure d'elements de geometrie avec affichage

Also Published As

Publication number Publication date
US4274053A (en) 1981-06-16
DE2908599A1 (de) 1979-09-20
GB2016144B (en) 1982-09-15
GB2016144A (en) 1979-09-19
JPS54118259A (en) 1979-09-13
FR2419506B1 (fr) 1985-10-04
CA1136240A (fr) 1982-11-23

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