JPS57199915A - Photoelectric type displacement meter - Google Patents

Photoelectric type displacement meter

Info

Publication number
JPS57199915A
JPS57199915A JP8541581A JP8541581A JPS57199915A JP S57199915 A JPS57199915 A JP S57199915A JP 8541581 A JP8541581 A JP 8541581A JP 8541581 A JP8541581 A JP 8541581A JP S57199915 A JPS57199915 A JP S57199915A
Authority
JP
Japan
Prior art keywords
photodetector array
displacement
change
photodetectors
displacement meter
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
JP8541581A
Other languages
Japanese (ja)
Inventor
Yoshihei Tani
Hisao Nagao
Koichi Kuwamura
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP8541581A priority Critical patent/JPS57199915A/en
Publication of JPS57199915A publication Critical patent/JPS57199915A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/028—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring lateral position of a boundary of the object
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To obtain a continuous displacement meter which is small in size, is long in life and can be electrically insulated by converting the displacement of an object to be detected to a change in electric current by the use of a photodetector array constituted of plural photodetectors. CONSTITUTION:A light emitting element 1 and a one-dimensional photodetector array 2 are placed to face each other and a light shielding plate 3 is disposed between these. The collectors of N-pieces of phototransistors Th1-N of the photodetector array are commonly connected, and the emitters of the respective phototransistors are connected independently to a current mirror circuit, so that the photocurrents of the respective photodetectors are controlled to a constant current. The number of the photodetectors which are kept irradiated with the light of an intensity higher than a certain intensity is changed by the change in the position of the plate 3 which converts the displacement of an object to be detected to the change in the rotating angle via a revolving shaft 4, whereby the displacement of said object is converted to the output current P0 of the photodetector array.
JP8541581A 1981-06-02 1981-06-02 Photoelectric type displacement meter Pending JPS57199915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8541581A JPS57199915A (en) 1981-06-02 1981-06-02 Photoelectric type displacement meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8541581A JPS57199915A (en) 1981-06-02 1981-06-02 Photoelectric type displacement meter

Publications (1)

Publication Number Publication Date
JPS57199915A true JPS57199915A (en) 1982-12-08

Family

ID=13858166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8541581A Pending JPS57199915A (en) 1981-06-02 1981-06-02 Photoelectric type displacement meter

Country Status (1)

Country Link
JP (1) JPS57199915A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6393520U (en) * 1986-12-09 1988-06-16
EP0376489A2 (en) * 1988-12-28 1990-07-04 Pitney Bowes Inc. Apparatus for optically profiling an object

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6393520U (en) * 1986-12-09 1988-06-16
EP0376489A2 (en) * 1988-12-28 1990-07-04 Pitney Bowes Inc. Apparatus for optically profiling an object

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