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WO1988009479A3 - Detecteur de position absolue utilisant des longueurs d'ondes multiples a structures de phases a pas decales - Google Patents

Detecteur de position absolue utilisant des longueurs d'ondes multiples a structures de phases a pas decales Download PDF

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Publication number
WO1988009479A3
WO1988009479A3 PCT/US1988/001768 US8801768W WO8809479A3 WO 1988009479 A3 WO1988009479 A3 WO 1988009479A3 US 8801768 W US8801768 W US 8801768W WO 8809479 A3 WO8809479 A3 WO 8809479A3
Authority
WO
WIPO (PCT)
Prior art keywords
offset pitch
absolute position
resolver
windings
offset
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.)
Ceased
Application number
PCT/US1988/001768
Other languages
English (en)
Other versions
WO1988009479A2 (fr
Inventor
Richard C Auchterlonie
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.)
Individual
Original Assignee
Individual
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 US07/055,422 external-priority patent/US4893078A/en
Application filed by Individual filed Critical Individual
Publication of WO1988009479A2 publication Critical patent/WO1988009479A2/fr
Publication of WO1988009479A3 publication Critical patent/WO1988009479A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H03M1/64—Analogue/digital converters with intermediate conversion to phase of sinusoidal or similar periodical signals
    • H03M1/645—Analogue/digital converters with intermediate conversion to phase of sinusoidal or similar periodical signals for position encoding, e.g. using resolvers or synchros
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • 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
    • G01D5/204—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 mutual induction between two or more coils
    • G01D5/2046—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 mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core

Landscapes

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

Abstract

Pour permettre à un résolveur (120) de détecter des positions absolues dans une large place de déplacement tout en obtenant la résolution, l'exactitude et la précision que l'on peut obtenir par un mode incrémentiel de fonctionnement, le résolveur est pourvu d'une pluralité de bornes (O1, O1, O2, O2) qui fournissent des indications (C1, C2) sur des phases à pas décalés en fonction de la position. Un micro-ordinateur (171) est programmé de façon à exécuter une procédure de décodage (160) afin de lire les indications sur les phases à pas décalés, puis de calculer à partir de celles-ci la position absolue. Ce procédé peut s'appliquer tant à la détection de positions linéaires qu'à la détection de positions rotatives. Par multiplexage, par traitement de signaux numériques et par intégration de circuits à large échelle (170) afin de créer une interface entre le résolveur (120) et le micro-ordinateur (171), on peut obtenir avec ce procédé une détection de positions absolues à fiabilité élevée et à coût réduit. Les indications sur les phases à pas décalés sont aisément fournies par un couplage inductif parmi une pluralité d'enroulements (123, 124, 125, 126, 127), y compris un ensemble d'enroulements à pas décalés (124, 125, 126, 127) connectés aux bornes. Un signal indicateur de phase est capté au moyen d'un capteur relativement mobile (50, 51, 52) ou d'une bobine stationnaire (123) reliée par une noyau ferromagnétique (121). Un modulateur (409) alimenté en H.F. sert à transmettre radiophoniquement le signal indicateur de phase en provenance du capteur mobile. Les enroulements à pas décalés sont formés par photolithographie sur une pluralité de couches laminées (W1, W4), ou en enroulant des bobines avec l'alignement approprié, par exemple sur un moule de bobinage (530) à couches et à pas multiples.
PCT/US1988/001768 1987-05-28 1988-05-26 Detecteur de position absolue utilisant des longueurs d'ondes multiples a structures de phases a pas decales Ceased WO1988009479A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US055,422 1987-05-28
US07/055,422 US4893078A (en) 1987-05-28 1987-05-28 Absolute position sensing using sets of windings of different pitches providing respective indications of phase proportional to displacement
US175,760 1988-03-31
US07/175,760 US4893077A (en) 1987-05-28 1988-03-31 Absolute position sensor having multi-layer windings of different pitches providing respective indications of phase proportional to displacement

Publications (2)

Publication Number Publication Date
WO1988009479A2 WO1988009479A2 (fr) 1988-12-01
WO1988009479A3 true WO1988009479A3 (fr) 1988-12-15

Family

ID=26734202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/001768 Ceased WO1988009479A2 (fr) 1987-05-28 1988-05-26 Detecteur de position absolue utilisant des longueurs d'ondes multiples a structures de phases a pas decales

Country Status (6)

Country Link
US (1) US4893077A (fr)
EP (1) EP0363426A4 (fr)
JP (1) JPH03502001A (fr)
AU (1) AU1983888A (fr)
CA (1) CA1301279C (fr)
WO (1) WO1988009479A2 (fr)

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Also Published As

Publication number Publication date
JPH03502001A (ja) 1991-05-09
US4893077A (en) 1990-01-09
EP0363426A1 (fr) 1990-04-18
AU1983888A (en) 1988-12-21
CA1301279C (fr) 1992-05-19
WO1988009479A2 (fr) 1988-12-01
EP0363426A4 (en) 1993-07-07

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