WO1991010288A3 - Position sensor - Google Patents

Position sensor Download PDF

Info

Publication number
WO1991010288A3
WO1991010288A3 PCT/GB1990/002004 GB9002004W WO9110288A3 WO 1991010288 A3 WO1991010288 A3 WO 1991010288A3 GB 9002004 W GB9002004 W GB 9002004W WO 9110288 A3 WO9110288 A3 WO 9110288A3
Authority
WO
WIPO (PCT)
Prior art keywords
detector
track
indicia
pattern
section
Prior art date
Application number
PCT/GB1990/002004
Other languages
French (fr)
Other versions
WO1991010288A2 (en
Inventor
Adrian Anthony Cecil March
Original Assignee
March Adrian Res 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
Priority claimed from GB9000097.7 external-priority
Application filed by March Adrian Res Ltd filed Critical March Adrian Res Ltd
Publication of WO1991010288A2 publication Critical patent/WO1991010288A2/en
Publication of WO1991010288A3 publication Critical patent/WO1991010288A3/en

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
    • H03M1/22—Analogue/digital converters pattern-reading type
    • H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
    • H03M1/28—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding
    • H03M1/282—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding of the pattern-shifting type, e.g. pseudo-random chain code
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/249—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
    • G01D5/2492—Pulse stream
    • G01D5/2495—Pseudo-random code
    • 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
    • G01D5/26—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 characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light
    • G01D5/32—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 characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—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 characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G9/00—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00

Abstract

A position sensor has a detector fixed to a first body, the detector having sensitive elements defining a track (10) of such elements. A scale being e.g. the optical image of a part of a second body, is caused to impinge on the detector. The scale has a track (6) of indicia (i.e. a bar pattern) and the sensitive elements of the track (10) of the detector detect their overlapping with a corresponding one or more of the indicia and generate an output depending on that overlapping. The indicia of the track (6) of indicia define two patterns (A, B) arranged in a plurality of successive sections (8). One pattern (A) is fixed for all sections (8) and the other pattern (B) varies according to a predetermined rule (e.g. cyclically) from section (8) to section (8). The track (10) of the detector detects a length of the track (6) of indicia corresponding approximately to the length of a section (8), as a result, the output of the detector can be processed to determine the relative positions of the first and second bodies, from detection of the relative position of the detector and the fixed pattern together with the relationship between the two patterns.
PCT/GB1990/002004 1990-01-03 1990-12-21 Position sensor WO1991010288A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9000097.7 1990-01-03
GB909000097A GB9000097D0 (en) 1990-01-03 1990-01-03 Position sensor

Publications (2)

Publication Number Publication Date
WO1991010288A2 WO1991010288A2 (en) 1991-07-11
WO1991010288A3 true WO1991010288A3 (en) 1991-11-28

Family

ID=10668791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/002004 WO1991010288A2 (en) 1990-01-03 1990-12-21 Position sensor

Country Status (2)

Country Link
GB (1) GB9000097D0 (en)
WO (1) WO1991010288A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19518664C2 (en) * 1995-05-20 2003-02-13 Christian Rathjen Method for determining the position of two bodies that can be moved relative to one another
DE19939643B4 (en) 1999-08-18 2005-10-13 Trimble Jena Gmbh Device and method for determining the position between two relatively movable parts
ES2199686B1 (en) * 2002-08-02 2005-09-16 Fagor, S.Coop. OPTICAL SENSOR OF THE ABSOLUTE POSITION, WITH AN IMAGE PHOTODETECTOR.
US9041385B2 (en) 2010-04-20 2015-05-26 Hamilton Bonaduz Ag Position detecting device and method for producing a marking arrangement for a position detecting device
DE102013217216B4 (en) * 2013-08-28 2019-05-09 Picofine GmbH Method and device for error detection and error compensation of an incremental sensor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB964526A (en) * 1960-06-18 1964-07-22 Konrad Zuse Analog-digital-converter
GB1107982A (en) * 1963-08-06 1968-03-27 Cooke Conrad Reginald Improvements in or relating to control systems for controlling the movement and/or displacement of a member
US3599004A (en) * 1969-01-24 1971-08-10 Oerlikon Buehrle Ag Arrangement of photocells for the determination of the position of an equidistantly divided scale
FR2352283A1 (en) * 1976-02-03 1977-12-16 Solartron Electronic Group DISPLACEMENT SENSOR WITH LOAD TRANSFER DEVICE
EP0039921A2 (en) * 1980-05-12 1981-11-18 Tokyo Kogaku Kikai Kabushiki Kaisha Encoder device and method of use of it
EP0368605A2 (en) * 1988-11-08 1990-05-16 Dr. Johannes Heidenhain GmbH Decoding of random sequences
EP0157177B1 (en) * 1984-03-31 1990-08-29 Dr. Johannes Heidenhain GmbH Position-measuring device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB964526A (en) * 1960-06-18 1964-07-22 Konrad Zuse Analog-digital-converter
GB1107982A (en) * 1963-08-06 1968-03-27 Cooke Conrad Reginald Improvements in or relating to control systems for controlling the movement and/or displacement of a member
US3599004A (en) * 1969-01-24 1971-08-10 Oerlikon Buehrle Ag Arrangement of photocells for the determination of the position of an equidistantly divided scale
FR2352283A1 (en) * 1976-02-03 1977-12-16 Solartron Electronic Group DISPLACEMENT SENSOR WITH LOAD TRANSFER DEVICE
EP0039921A2 (en) * 1980-05-12 1981-11-18 Tokyo Kogaku Kikai Kabushiki Kaisha Encoder device and method of use of it
EP0157177B1 (en) * 1984-03-31 1990-08-29 Dr. Johannes Heidenhain GmbH Position-measuring device
EP0368605A2 (en) * 1988-11-08 1990-05-16 Dr. Johannes Heidenhain GmbH Decoding of random sequences

Also Published As

Publication number Publication date
WO1991010288A2 (en) 1991-07-11
GB9000097D0 (en) 1990-03-07

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