GB2057119B - Fibre optic digital positional encoder - Google Patents

Fibre optic digital positional encoder

Info

Publication number
GB2057119B
GB2057119B GB7929042A GB7929042A GB2057119B GB 2057119 B GB2057119 B GB 2057119B GB 7929042 A GB7929042 A GB 7929042A GB 7929042 A GB7929042 A GB 7929042A GB 2057119 B GB2057119 B GB 2057119B
Authority
GB
United Kingdom
Prior art keywords
fibre optic
positional encoder
optic digital
digital positional
encoder
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
GB7929042A
Other versions
GB2057119A (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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB7929042A priority Critical patent/GB2057119B/en
Publication of GB2057119A publication Critical patent/GB2057119A/en
Application granted granted Critical
Publication of GB2057119B publication Critical patent/GB2057119B/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
    • G01D5/36—Forming the light into pulses
    • G01D5/363—Direction discrimination
    • 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
    • G01D5/24404—Interpolation using high frequency signals
    • 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
    • H03M1/30—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental
    • H03M1/303—Circuits or methods for processing the quadrature signals
    • H03M1/305—Circuits or methods for processing the quadrature signals for detecting the direction of movement
    • 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
    • H03M1/30—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental
    • H03M1/308—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental with additional pattern means for determining the absolute position, e.g. reference marks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Transform (AREA)
GB7929042A 1979-08-21 1979-08-21 Fibre optic digital positional encoder Expired GB2057119B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7929042A GB2057119B (en) 1979-08-21 1979-08-21 Fibre optic digital positional encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7929042A GB2057119B (en) 1979-08-21 1979-08-21 Fibre optic digital positional encoder

Publications (2)

Publication Number Publication Date
GB2057119A GB2057119A (en) 1981-03-25
GB2057119B true GB2057119B (en) 1983-04-13

Family

ID=10507330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7929042A Expired GB2057119B (en) 1979-08-21 1979-08-21 Fibre optic digital positional encoder

Country Status (1)

Country Link
GB (1) GB2057119B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461944A (en) * 1982-06-07 1984-07-24 General Electric Company System for interfacing an encoder to a microcomputer
JPS59501639A (en) * 1982-09-25 1984-09-13 レニシヨウ　パブリツク　リミテツド　カンパニ− displacement measuring device
GB2131163B (en) * 1982-11-29 1986-02-26 Gardner R F Monitoring rotational movement
GB2133541A (en) * 1983-01-07 1984-07-25 Plessey Co Plc Movement detecting apparatus
DE3310348A1 (en) * 1983-03-22 1984-09-27 Siemens AG, 1000 Berlin und 8000 München INCREMENTAL MEASURING DEVICE
GB2164444A (en) * 1984-09-15 1986-03-19 Lamb Sceptre Ltd Position monitoring apparatus
EP0623817B1 (en) * 1993-04-23 1999-01-13 Shimadzu Corporation Local analysis of a specimen in an x-ray fluorescence spectrometer

Also Published As

Publication number Publication date
GB2057119A (en) 1981-03-25

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee