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GB2038578B - Position indicating systems - Google Patents

Position indicating systems

Info

Publication number
GB2038578B
GB2038578B GB7941474A GB7941474A GB2038578B GB 2038578 B GB2038578 B GB 2038578B GB 7941474 A GB7941474 A GB 7941474A GB 7941474 A GB7941474 A GB 7941474A GB 2038578 B GB2038578 B GB 2038578B
Authority
GB
United Kingdom
Prior art keywords
position indicating
indicating systems
systems
indicating
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.)
Expired
Application number
GB7941474A
Other versions
GB2038578A (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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB7941474A priority Critical patent/GB2038578B/en
Publication of GB2038578A publication Critical patent/GB2038578A/en
Application granted granted Critical
Publication of GB2038578B publication Critical patent/GB2038578B/en
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
    • G01D5/26—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 infrared, visible, or ultraviolet 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 infrared, visible, or ultraviolet 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 infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—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 infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34776—Absolute encoders with analogue or digital scales
    • G01D5/34792—Absolute encoders with analogue or digital scales with only digital scales or both digital and incremental scales
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Transform (AREA)
GB7941474A 1978-12-06 1979-11-30 Position indicating systems Expired GB2038578B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7941474A GB2038578B (en) 1978-12-06 1979-11-30 Position indicating systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7847428 1978-12-06
GB7941474A GB2038578B (en) 1978-12-06 1979-11-30 Position indicating systems

Publications (2)

Publication Number Publication Date
GB2038578A GB2038578A (en) 1980-07-23
GB2038578B true GB2038578B (en) 1983-01-19

Family

ID=26269865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7941474A Expired GB2038578B (en) 1978-12-06 1979-11-30 Position indicating systems

Country Status (1)

Country Link
GB (1) GB2038578B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187875A1 (en) * 1985-01-02 1986-07-23 ITALORA S.p.A. A digital transducer
GB2209101A (en) * 1987-08-23 1989-04-26 Schlumberger Ind Ltd Optical transducer sensing
GB9022969D0 (en) * 1990-10-23 1990-12-05 Rosemount Ltd Displacement measurement apparatus
DE10246268B4 (en) 2002-10-02 2004-11-18 Pwb-Ruhlatec Industrieprodukte Gmbh encoder arrangement
CN110304115B (en) * 2019-07-30 2024-02-20 东莞开道科技有限公司 Mobile positioning device and method based on color coding and rail transit system

Also Published As

Publication number Publication date
GB2038578A (en) 1980-07-23

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19951130