JPS5770477A - Photoelectric type object detector - Google Patents

Photoelectric type object detector

Info

Publication number
JPS5770477A
JPS5770477A JP55146841A JP14684180A JPS5770477A JP S5770477 A JPS5770477 A JP S5770477A JP 55146841 A JP55146841 A JP 55146841A JP 14684180 A JP14684180 A JP 14684180A JP S5770477 A JPS5770477 A JP S5770477A
Authority
JP
Japan
Prior art keywords
rays
detected
signal
counter
outputs
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.)
Granted
Application number
JP55146841A
Other languages
Japanese (ja)
Other versions
JPS6218028B2 (en
Inventor
Manabu Kikuchi
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.)
Koito Industries Ltd
Original Assignee
Koito Industries 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 Koito Industries Ltd filed Critical Koito Industries Ltd
Priority to JP55146841A priority Critical patent/JPS5770477A/en
Publication of JPS5770477A publication Critical patent/JPS5770477A/en
Publication of JPS6218028B2 publication Critical patent/JPS6218028B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To eliminate the influence of disturbance rays and increase the rate of sensing responsiveness by amplifying signal waves and noises with a wide band amplifier then digitally processing the same and detecting only the signal wave components. CONSTITUTION:The noise rays from a modulating light source and an illuminating light source LSa, LSb from a light projector PRT incident to a photoelectric conversion circuit CNV of a photodetector RPT are converted simultaneously to electric signals. The outputs thereof are inputted via a wide band amplifier AMP and a waveform shaping circuit WS to the clear terminal CL of a counter CNTa, and pulses from a reference oscillator STG are applied to the clock terminal CK of the counter. When signal rays are shut off by an object to be detected DB, the noise components disappear temporarily and therefore outputs are obtained from the output terminal Qn of the counter CNTa, and a continuous detection signal is outputted from a monostable multivibrator MV. Thereby, the object to be detected is detected surely with the simple constitution.
JP55146841A 1980-10-22 1980-10-22 Photoelectric type object detector Granted JPS5770477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55146841A JPS5770477A (en) 1980-10-22 1980-10-22 Photoelectric type object detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55146841A JPS5770477A (en) 1980-10-22 1980-10-22 Photoelectric type object detector

Publications (2)

Publication Number Publication Date
JPS5770477A true JPS5770477A (en) 1982-04-30
JPS6218028B2 JPS6218028B2 (en) 1987-04-21

Family

ID=15416738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55146841A Granted JPS5770477A (en) 1980-10-22 1980-10-22 Photoelectric type object detector

Country Status (1)

Country Link
JP (1) JPS5770477A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6027882A (en) * 1983-07-23 1985-02-12 Dowa Mining Co Ltd Optical detector
JPS61198085A (en) * 1985-02-28 1986-09-02 Hokuyo Automatic Co Photoelectric switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6027882A (en) * 1983-07-23 1985-02-12 Dowa Mining Co Ltd Optical detector
JPH0311673B2 (en) * 1983-07-23 1991-02-18 Dowa Mining Co
JPS61198085A (en) * 1985-02-28 1986-09-02 Hokuyo Automatic Co Photoelectric switch
JPH0352916B2 (en) * 1985-02-28 1991-08-13 Hokuyo Denki Kk

Also Published As

Publication number Publication date
JPS6218028B2 (en) 1987-04-21

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