JPS57106818A - Position detector - Google Patents

Position detector

Info

Publication number
JPS57106818A
JPS57106818A JP18347580A JP18347580A JPS57106818A JP S57106818 A JPS57106818 A JP S57106818A JP 18347580 A JP18347580 A JP 18347580A JP 18347580 A JP18347580 A JP 18347580A JP S57106818 A JPS57106818 A JP S57106818A
Authority
JP
Japan
Prior art keywords
circuit
light emission
moving
strength
value
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.)
Pending
Application number
JP18347580A
Other languages
Japanese (ja)
Inventor
Masao Tsunekawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18347580A priority Critical patent/JPS57106818A/en
Publication of JPS57106818A publication Critical patent/JPS57106818A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Optical Transform (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To carry out the precise detection of a position irrespectively of replacement or a secular change of a position detector by correcting the detecting sensitivity of a detecting means so that a detected value becomes a value set in advance through moving a code member in a specified quantity. CONSTITUTION:When a strength inspecting circuit 8 of light emission is actuated, a set of light emitter 2 and photodetector 3 is moved to a code plate 1. This moving is carried on until a CODE signal is changed, and the quantity of moving during the period is counted by a counter in the strength inspecting circuit 8 for light emission. And the light emission strength of the light emitting circuit 2 or the detection sensitivity of the photodetector circuit 3 is controlled CNTL so that this counting value may become a specified value.
JP18347580A 1980-12-24 1980-12-24 Position detector Pending JPS57106818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18347580A JPS57106818A (en) 1980-12-24 1980-12-24 Position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18347580A JPS57106818A (en) 1980-12-24 1980-12-24 Position detector

Publications (1)

Publication Number Publication Date
JPS57106818A true JPS57106818A (en) 1982-07-02

Family

ID=16136439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18347580A Pending JPS57106818A (en) 1980-12-24 1980-12-24 Position detector

Country Status (1)

Country Link
JP (1) JPS57106818A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002303538A (en) * 2001-04-03 2002-10-18 Topcon Corp Encoder reading device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002303538A (en) * 2001-04-03 2002-10-18 Topcon Corp Encoder reading device

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