JPS56120902A - Detecting method for position - Google Patents

Detecting method for position

Info

Publication number
JPS56120902A
JPS56120902A JP2460380A JP2460380A JPS56120902A JP S56120902 A JPS56120902 A JP S56120902A JP 2460380 A JP2460380 A JP 2460380A JP 2460380 A JP2460380 A JP 2460380A JP S56120902 A JPS56120902 A JP S56120902A
Authority
JP
Japan
Prior art keywords
light
moving
coincidence
scales
patterns
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
JP2460380A
Other languages
Japanese (ja)
Inventor
Kiyoshi Nonaka
Hiroshi Horikawa
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2460380A priority Critical patent/JPS56120902A/en
Publication of JPS56120902A publication Critical patent/JPS56120902A/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)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To improve resolving power and S/N ratio and thereby perform highly precise detection of a position by performing the detection of the position by using a pattern based on two-valued random numbers or a pattern based on M series or pluralistic M series which are excellent in autocorrelation property. CONSTITUTION:A pair of scales 2 and 3 having patterns prepared, for instance, on the basis of two-valued random numbers of thirty-one cycles (01001010011010 10101110100111010) wherein 1 is assigned to the pass of light and 0 to the interception thereof and constituted by a part 7 passing light and a part 8 intercepting light are used, and the scale 2 is fixed, while the scale 3 is set on a moving body. And the light from a light source 1 passing through windows 7 moving in parallel to each other is detected through the random patterns on the scales 2 and 3 by a detector 4. By detecting the position of coincidence of both random patterns, the coincidence of positions of bodies moving in parallel relatively is detected.
JP2460380A 1980-02-28 1980-02-28 Detecting method for position Pending JPS56120902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2460380A JPS56120902A (en) 1980-02-28 1980-02-28 Detecting method for position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2460380A JPS56120902A (en) 1980-02-28 1980-02-28 Detecting method for position

Publications (1)

Publication Number Publication Date
JPS56120902A true JPS56120902A (en) 1981-09-22

Family

ID=12142717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2460380A Pending JPS56120902A (en) 1980-02-28 1980-02-28 Detecting method for position

Country Status (1)

Country Link
JP (1) JPS56120902A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837515A (en) * 1981-08-10 1983-03-04 Yokogawa Hewlett Packard Ltd Optical modulator
JPS5891933A (en) * 1981-11-25 1983-06-01 Nichiden Mach Ltd Torque limiter
JPH06100479B2 (en) * 1982-09-01 1994-12-12 ローズマウント エンジニアリング コムパニー リミテッド Position measuring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837515A (en) * 1981-08-10 1983-03-04 Yokogawa Hewlett Packard Ltd Optical modulator
JPS6453914U (en) * 1981-08-10 1989-04-03
JPS5891933A (en) * 1981-11-25 1983-06-01 Nichiden Mach Ltd Torque limiter
JPH06100479B2 (en) * 1982-09-01 1994-12-12 ローズマウント エンジニアリング コムパニー リミテッド Position measuring device

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