GB1161561A - Improvements in or relating to Positional Displacement Transducer Arrangements - Google Patents

Improvements in or relating to Positional Displacement Transducer Arrangements

Info

Publication number
GB1161561A
GB1161561A GB51257/65A GB5125765A GB1161561A GB 1161561 A GB1161561 A GB 1161561A GB 51257/65 A GB51257/65 A GB 51257/65A GB 5125765 A GB5125765 A GB 5125765A GB 1161561 A GB1161561 A GB 1161561A
Authority
GB
United Kingdom
Prior art keywords
signals
binary
grating
tapped
degrees
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
GB51257/65A
Inventor
Alexander Russell
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to DE19661548741 priority Critical patent/DE1548741C/en
Priority to US570526A priority patent/US3529170A/en
Priority to SE10629/66A priority patent/SE336472B/xx
Priority to FR72341A priority patent/FR1514974A/en
Publication of GB1161561A publication Critical patent/GB1161561A/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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/27—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an absolute digital measuring device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37296—Electronic graduation, scale expansion, interpolation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Optical Transform (AREA)

Abstract

1,161,561. Measuring position photo-electrically. NATIONAL RESEARCH DEVELOPMENT CORP. 8 Aug., 1966 [6 Aug., 1965; 2 Dec., 1965], Nos. 33831/65 and 51257/65. Heading G4H. Apparatus for measuring position, of the type in which a plurality of phase displaced sinusoidal signals is produced photo-electrically by a grating, is provided with means for determining the instantaneous sign of each of the signals and means for decoding the binary outputs of such means to give a digital indication of position. Three photo-cells are provided producing signals with relative phases 0, 90 and 180 degrees which are applied to a potentiometer so that a larger number of signals may be tapped off. For a decimal indication, 10 signals are tapped off between 0 and 180 degrees and applied to Schmitt trigger circuits to give a binary indication of the sign of the signals. The binary signals and their complements are taken in pairs to 20 NOR gates, the pairs being chosen so that only one NOR gate will give an output at a given time and that output will indicate the position of the grating in 20ths of the grating spacing. The output energizes corresponding indicator lamps. To provide higher order digits, encoders are geared to the means moving the grating. The encoders comprise two sets of switches which are operated by cams and serve to energize appropriate indicator lamps using signals derived from the fine positioning device. For a binary measurement, 8 signals are tapped off between 0 and 180 degrees and applied to Schmitt triggers. The binary outputs of the trigger circuits are switched in accordance with the sign of the 0 and 90 degree signals to appropriate parts of an encoding matrix to write the position into a binary store. Higher order digits are derived by a conventional coded track.
GB51257/65A 1965-08-06 1965-08-06 Improvements in or relating to Positional Displacement Transducer Arrangements Expired GB1161561A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19661548741 DE1548741C (en) 1965-08-06 1966-08-04 Transmission arrangement for a numerical position indicator of a movable object borrowed
US570526A US3529170A (en) 1965-08-06 1966-08-05 Apparatus for signalling the instantaneous position of an object movable along a predetermined path
SE10629/66A SE336472B (en) 1965-08-06 1966-08-05
FR72341A FR1514974A (en) 1965-08-06 1966-08-06 Transducer system translating the movements of a moving object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3383165 1965-08-06

Publications (1)

Publication Number Publication Date
GB1161561A true GB1161561A (en) 1969-08-13

Family

ID=10358017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51257/65A Expired GB1161561A (en) 1965-08-06 1965-08-06 Improvements in or relating to Positional Displacement Transducer Arrangements

Country Status (1)

Country Link
GB (1) GB1161561A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628794A1 (en) * 1976-06-26 1977-12-29 Diehl Fa Digital display electromechanical regulator - is for time measuring instrument has pulse generators, counters and display control
GB2195762A (en) * 1986-10-03 1988-04-13 Rank Taylor Hobson Ltd Interpolator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628794A1 (en) * 1976-06-26 1977-12-29 Diehl Fa Digital display electromechanical regulator - is for time measuring instrument has pulse generators, counters and display control
GB2195762A (en) * 1986-10-03 1988-04-13 Rank Taylor Hobson Ltd Interpolator
US4823000A (en) * 1986-10-03 1989-04-18 Rank Taylor Hobson Limited Apparatus for indicating the value of a variable

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed [section 19, patents act 1949]
PE Patent expired