GB1302762A - - Google Patents

Info

Publication number
GB1302762A
GB1302762A GB1302762DA GB1302762A GB 1302762 A GB1302762 A GB 1302762A GB 1302762D A GB1302762D A GB 1302762DA GB 1302762 A GB1302762 A GB 1302762A
Authority
GB
United Kingdom
Prior art keywords
count
pulses
sensed
photo
scale
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
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 filed Critical
Publication of GB1302762A publication Critical patent/GB1302762A/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
    • G01D5/12—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
    • G01D5/245—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 a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks
    • 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
    • G01D5/366—Particular pulse shapes
    • 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
    • G05B19/21—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 incremental 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
    • G05B2219/37109—Photoelectric scanned raster, rule and photocell, microscope
    • 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
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50083—Power loss, measures again loss of power

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1302762 Length or angle measuring apparatus DR JOHANNES HEIDENHAIN 6 Feb 1970 5843/70 Heading G4H In length or angle measuring apparatus in which pulses are accumulated in a counter 32 (Fig. 1) for each increment of displacement of a scale a reference pulse, the position of which relative to the scale is fixed, is generated which, in accordance with the state of switches 37, 38, 39 results in either (a) the count being stopped, (b) the count being set to a predetermined count determined by the contents of a store 36 or (c) the counters continuing to count the pulses. As described the incremental pulses are obtained from gratings 10, 11 sensed by photo-cells 16, 17 to drive the counter forwards or backwards, the reference pulses being derived from further markings 18, 19 sensed by photo-cell 21. Alternatively capacitive magnetic or inductive sensing may be used. A reset button 40 is provided to stop the count and a lamp 35 is illuminated by the reference pulse.
GB1302762D 1970-02-06 1970-02-06 Expired GB1302762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB584370 1970-02-06

Publications (1)

Publication Number Publication Date
GB1302762A true GB1302762A (en) 1973-01-10

Family

ID=9803671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1302762D Expired GB1302762A (en) 1970-02-06 1970-02-06

Country Status (1)

Country Link
GB (1) GB1302762A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398285A1 (en) * 1977-07-21 1979-02-16 Heidenhain Gmbh Dr Johannes ELECTRONIC COUNTER
FR2400184A1 (en) * 1977-08-12 1979-03-09 Rieder Heinz DIGITAL POSITION MEASUREMENT DEVICE
EP0033902A2 (en) * 1980-02-12 1981-08-19 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Method for the surveillance of pulse trains
EP0077423A1 (en) * 1981-10-20 1983-04-27 Sony Corporation Length measuring devices
US4400890A (en) * 1981-10-26 1983-08-30 Sony Corporation Length measuring device
EP0131900A2 (en) * 1983-07-13 1985-01-23 Litton Precision Products International GmbH Incremental angular encoder
EP0175576A2 (en) * 1984-09-20 1986-03-26 Fujitsu Ten, Ltd. Crank angle detecting apparatus for an internal combustion engine
GB2186362A (en) * 1986-01-14 1987-08-12 Canon Kk Reference position detecting device and encoder having said device
EP0320589A2 (en) * 1987-12-14 1989-06-21 Dr. Johannes Heidenhain GmbH Position-measuring device with several detectors
US7141780B2 (en) 2001-02-14 2006-11-28 Renishaw Plc Position determination system for determining the position of one relatively moveable part relative to another relatively movable part

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398285A1 (en) * 1977-07-21 1979-02-16 Heidenhain Gmbh Dr Johannes ELECTRONIC COUNTER
FR2400184A1 (en) * 1977-08-12 1979-03-09 Rieder Heinz DIGITAL POSITION MEASUREMENT DEVICE
EP0033902A2 (en) * 1980-02-12 1981-08-19 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Method for the surveillance of pulse trains
EP0033902A3 (en) * 1980-02-12 1982-07-14 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Method for the surveillance of pulse trains
EP0077423A1 (en) * 1981-10-20 1983-04-27 Sony Corporation Length measuring devices
US4400890A (en) * 1981-10-26 1983-08-30 Sony Corporation Length measuring device
EP0131900A2 (en) * 1983-07-13 1985-01-23 Litton Precision Products International GmbH Incremental angular encoder
EP0131900A3 (en) * 1983-07-13 1987-10-28 Litton Precision Products International GmbH Incremental angular encoder
EP0175576A3 (en) * 1984-09-20 1987-02-04 Fujitsu-Ten, Ltd Crank angle detecting apparatus for an internal combustion engine
EP0175576A2 (en) * 1984-09-20 1986-03-26 Fujitsu Ten, Ltd. Crank angle detecting apparatus for an internal combustion engine
GB2186362A (en) * 1986-01-14 1987-08-12 Canon Kk Reference position detecting device and encoder having said device
GB2186362B (en) * 1986-01-14 1990-07-18 Canon Kk Reference position detecting device and encoder having said device
US5059791A (en) * 1986-01-14 1991-10-22 Canon Kabushiki Kaisha Reference position detecting device utilizing a plurality of photo-detectors and an encoder using the device
EP0320589A2 (en) * 1987-12-14 1989-06-21 Dr. Johannes Heidenhain GmbH Position-measuring device with several detectors
EP0320589A3 (en) * 1987-12-14 1990-09-05 Dr. Johannes Heidenhain Gmbh Position-measuring device with several detectors
US7141780B2 (en) 2001-02-14 2006-11-28 Renishaw Plc Position determination system for determining the position of one relatively moveable part relative to another relatively movable part

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees