JPS57118176A - Detector for shielding material in front of moving body detector using space filter - Google Patents

Detector for shielding material in front of moving body detector using space filter

Info

Publication number
JPS57118176A
JPS57118176A JP56004186A JP418681A JPS57118176A JP S57118176 A JPS57118176 A JP S57118176A JP 56004186 A JP56004186 A JP 56004186A JP 418681 A JP418681 A JP 418681A JP S57118176 A JPS57118176 A JP S57118176A
Authority
JP
Japan
Prior art keywords
debris flow
amplifier
output
photodetectors
discriminated
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
JP56004186A
Other languages
Japanese (ja)
Inventor
Suteo Tsutsumi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP56004186A priority Critical patent/JPS57118176A/en
Publication of JPS57118176A publication Critical patent/JPS57118176A/en
Pending 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

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)

Abstract

PURPOSE:To detect the shielding materials existing in front of an object by allowing the incidence of part of the light from the object to two pieces of photodetectors which are formed in a comb shape via an oscillating reflecting mirror. CONSTITUTION:The light from a place Q where debris flow occurs is made incident to photodetectors 1a, 1b which are formed in a comb shape in the course of an objective lens 2, small prisms 3, 7, and the lens 2, the prism 3, an oscillating reflecting mirror 4, a small prism 5, a lens system 6, and the prism 7. The mirror 4 is oscillated by an oscillation command signal. The signals of the photodetectors 1a, 1b are inputted to a cumulative amplifier 11 and a differential amplifier 12. The output of the amplifier 11 is discriminated of the case in which the average brightness of the image is above a certain valve. The output of the amplifier 12 is detected of AC components with a detecting circuit 14. The presence or absence of fogs is discriminated by the output during oscillation of the mirror 4, and the occurrence of debris flow is detected by the output under nooscillation. Hence, whether the debris flow does not occur or the occurrence of the debris flow cannot be detected as it is shielded by fogs is discriminated.
JP56004186A 1981-01-14 1981-01-14 Detector for shielding material in front of moving body detector using space filter Pending JPS57118176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56004186A JPS57118176A (en) 1981-01-14 1981-01-14 Detector for shielding material in front of moving body detector using space filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56004186A JPS57118176A (en) 1981-01-14 1981-01-14 Detector for shielding material in front of moving body detector using space filter

Publications (1)

Publication Number Publication Date
JPS57118176A true JPS57118176A (en) 1982-07-22

Family

ID=11577668

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56004186A Pending JPS57118176A (en) 1981-01-14 1981-01-14 Detector for shielding material in front of moving body detector using space filter

Country Status (1)

Country Link
JP (1) JPS57118176A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60150478U (en) * 1984-03-19 1985-10-05 株式会社山武 flame detection device
JPH02266285A (en) * 1989-04-07 1990-10-31 Yamatake Honeywell Co Ltd Detecting device for moving body
JPH0460489A (en) * 1990-06-29 1992-02-26 Yamatake Honeywell Co Ltd Monitoring system of parking lot

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60150478U (en) * 1984-03-19 1985-10-05 株式会社山武 flame detection device
JPH0321508Y2 (en) * 1984-03-19 1991-05-10
JPH02266285A (en) * 1989-04-07 1990-10-31 Yamatake Honeywell Co Ltd Detecting device for moving body
JPH0460489A (en) * 1990-06-29 1992-02-26 Yamatake Honeywell Co Ltd Monitoring system of parking lot

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