GB2210222B - Optical displacement transducer - Google Patents

Optical displacement transducer

Info

Publication number
GB2210222B
GB2210222B GB8900468A GB8900468A GB2210222B GB 2210222 B GB2210222 B GB 2210222B GB 8900468 A GB8900468 A GB 8900468A GB 8900468 A GB8900468 A GB 8900468A GB 2210222 B GB2210222 B GB 2210222B
Authority
GB
United Kingdom
Prior art keywords
displacement transducer
optical displacement
optical
transducer
displacement
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 - Lifetime
Application number
GB8900468A
Other versions
GB2210222A (en
GB8900468D0 (en
Inventor
James Stewart Johnston
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.)
Emerson Process Management Ltd
Original Assignee
Rosemount 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 GB868600591A external-priority patent/GB8600591D0/en
Application filed by Rosemount Ltd filed Critical Rosemount Ltd
Priority to GB8900468A priority Critical patent/GB2210222B/en
Publication of GB8900468D0 publication Critical patent/GB8900468D0/en
Publication of GB2210222A publication Critical patent/GB2210222A/en
Application granted granted Critical
Publication of GB2210222B publication Critical patent/GB2210222B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03M1/22—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 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
GB8900468A 1986-01-10 1989-01-10 Optical displacement transducer Expired - Lifetime GB2210222B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8900468A GB2210222B (en) 1986-01-10 1989-01-10 Optical displacement transducer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868600591A GB8600591D0 (en) 1986-01-10 1986-01-10 Optical displacement transducer
GB8900468A GB2210222B (en) 1986-01-10 1989-01-10 Optical displacement transducer

Publications (3)

Publication Number Publication Date
GB8900468D0 GB8900468D0 (en) 1989-03-08
GB2210222A GB2210222A (en) 1989-06-01
GB2210222B true GB2210222B (en) 1990-01-17

Family

ID=26290205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8900468A Expired - Lifetime GB2210222B (en) 1986-01-10 1989-01-10 Optical displacement transducer

Country Status (1)

Country Link
GB (1) GB2210222B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5502380A (en) * 1994-04-28 1996-03-26 Rosemount Inc. Analog weighted binary absolute position encoder including an array of sense resistors each having material responsive to FWX and nonresponsive to flux
DE102005047009A1 (en) * 2005-09-30 2007-04-05 Bosch Rexroth Mechatronics Gmbh Absolute position measuring system
CN111912440A (en) * 2020-09-04 2020-11-10 大连华锐重工集团股份有限公司 System and method for detecting absolute position of track crane equipment

Also Published As

Publication number Publication date
GB2210222A (en) 1989-06-01
GB8900468D0 (en) 1989-03-08

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Legal Events

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

Effective date: 19980105