JPS56158977A - Presence detector - Google Patents

Presence detector

Info

Publication number
JPS56158977A
JPS56158977A JP6319780A JP6319780A JPS56158977A JP S56158977 A JPS56158977 A JP S56158977A JP 6319780 A JP6319780 A JP 6319780A JP 6319780 A JP6319780 A JP 6319780A JP S56158977 A JPS56158977 A JP S56158977A
Authority
JP
Japan
Prior art keywords
detected
space
tape
reflected light
image sensor
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
JP6319780A
Other languages
Japanese (ja)
Inventor
Akiro Sanemori
Shinichi Kuroda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6319780A priority Critical patent/JPS56158977A/en
Publication of JPS56158977A publication Critical patent/JPS56158977A/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
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
    • G01V8/14—Detecting, e.g. by using light barriers using one transmitter and one receiver using reflectors

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 presence of a body easily by irradiating a reflective tape provided on a wall in a space to be detected and by detecting its reflected light. CONSTITUTION:A light-reflective tape 11 is provided continuously and horizontally, for instance, on walls 12A and 13B of an elevator, in a space to be detected. This tape 11 is irradiated with a projector 13 and its reflected light is detected through a lens 13A by the photodetector 13 consisting of many image sensor elements 13B provided corresponding to positions of the tape 11. Then, a signal processor 14 scans outputs a respective image sensor elements 13B. Therefore, if the arrival of the reflected light at the detector 13 is prevented, a difference in detection level is generated, so that the presence of a body in a space to be detected is detected easily.
JP6319780A 1980-05-13 1980-05-13 Presence detector Pending JPS56158977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6319780A JPS56158977A (en) 1980-05-13 1980-05-13 Presence detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6319780A JPS56158977A (en) 1980-05-13 1980-05-13 Presence detector

Publications (1)

Publication Number Publication Date
JPS56158977A true JPS56158977A (en) 1981-12-08

Family

ID=13222247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6319780A Pending JPS56158977A (en) 1980-05-13 1980-05-13 Presence detector

Country Status (1)

Country Link
JP (1) JPS56158977A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121840A2 (en) * 1983-04-01 1984-10-17 Siemens Aktiengesellschaft Position determination device for an object within a field of view
US4593189A (en) * 1983-11-09 1986-06-03 Siemens Gammasonics, Inc. Proximity detector for a body scanner
JPS6358191A (en) * 1986-08-28 1988-03-12 Tech Res & Dev Inst Of Japan Def Agency Obstruction detector
WO1991006018A1 (en) * 1989-10-13 1991-05-02 John Trett Obstruction detection apparatus
JP2018116057A (en) * 2017-01-16 2018-07-26 パナソニックＩｐマネジメント株式会社 Detection system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121840A2 (en) * 1983-04-01 1984-10-17 Siemens Aktiengesellschaft Position determination device for an object within a field of view
US4593189A (en) * 1983-11-09 1986-06-03 Siemens Gammasonics, Inc. Proximity detector for a body scanner
JPS6358191A (en) * 1986-08-28 1988-03-12 Tech Res & Dev Inst Of Japan Def Agency Obstruction detector
WO1991006018A1 (en) * 1989-10-13 1991-05-02 John Trett Obstruction detection apparatus
JP2018116057A (en) * 2017-01-16 2018-07-26 パナソニックＩｐマネジメント株式会社 Detection system

Similar Documents

Publication Publication Date Title
EP0360126A3 (en) Operation method for an optical smoke detector and smoke detector for carrying out the method
EP0329083A3 (en) Photoelectric switching apparatus of reflection type
KR970007740A (en) Position discriminator of human body using infrared sensor
JPS56168104A (en) Detector for mark position
JPS56158977A (en) Presence detector
JPS5472094A (en) Bottle bottom inspecting machine
FR2445512A1 (en) Position detecting system for image forming appts. - includes two part photodiode providing two signals with difference proportional to position error
JPS5639554A (en) Original density measuring method
JPS57204409A (en) Intercar distance measuring device
JPS6423145A (en) Optical appearance inspection device
JPS5678849A (en) Original size detector
JPS5651646A (en) Toner concentration sensor
JPS5694248A (en) Detector for foreign matter on surface
JPS55117945A (en) Defect detection unit
JPS53127990A (en) Travelling body controller
JPS5572825A (en) Detecting method for liquid level position in container
JPS57197402A (en) Position detector
JPS53131848A (en) Surface defect detector of photoreceptor
JPS56122069A (en) Copying system using photodetector and light emitting element
JPS6474433A (en) Particle detecting device
JPS6413171A (en) Toner density detector
JPS55138604A (en) Automobile position detector
JPS5774619A (en) Liquid surface level detector
JPS6431292A (en) Object detector
JPS576342A (en) Detector for state of road surface