JPS5773688A - Body passage detector - Google Patents

Body passage detector

Info

Publication number
JPS5773688A
JPS5773688A JP55150550A JP15055080A JPS5773688A JP S5773688 A JPS5773688 A JP S5773688A JP 55150550 A JP55150550 A JP 55150550A JP 15055080 A JP15055080 A JP 15055080A JP S5773688 A JPS5773688 A JP S5773688A
Authority
JP
Japan
Prior art keywords
light emitting
tube
photodetecting
elements
work
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
JP55150550A
Other languages
Japanese (ja)
Inventor
Eizo Wada
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.)
TOUKIYOU SEIMITSU KK
Tokyo Seimitsu Co Ltd
Original Assignee
TOUKIYOU SEIMITSU KK
Tokyo Seimitsu Co 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 TOUKIYOU SEIMITSU KK, Tokyo Seimitsu Co Ltd filed Critical TOUKIYOU SEIMITSU KK
Priority to JP55150550A priority Critical patent/JPS5773688A/en
Publication of JPS5773688A publication Critical patent/JPS5773688A/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
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE:To detect even a body which passes through any part of a cylindrical tube securely by a body passage detector in the tube, by arranging light emitting elements and photodetecting elements on the internal wall of the tube by turns so that they face to each other. CONSTITUTION:On the circumferential wall of a tube 1, a light emitting element A1 and a photodetecting element A1' are arranged, and a light emitting element A2 and a photodetecting elements A2' are also arranged next to the photodetecting element A1' and light emitting element A1 respectively. Then, center lines of light beams emitted from the light emitting elements A1 and A2 are in parallel across the center point O of the tube 1. Several couples of light emitting elements and photodetecting elements are arranged similarly on the circumferential wall of the tube 1. When a work 2 passes near the circumferential wall of the tube 1, the light beam from the element A1 decreases in quantity because it is cut off partially, so the element A1' detects the passage of the work 2 securely. Since each photodetecting element receives light from only its corresponding light emitting element, the passage of a work is detected securely.
JP55150550A 1980-10-27 1980-10-27 Body passage detector Pending JPS5773688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55150550A JPS5773688A (en) 1980-10-27 1980-10-27 Body passage detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150550A JPS5773688A (en) 1980-10-27 1980-10-27 Body passage detector

Publications (1)

Publication Number Publication Date
JPS5773688A true JPS5773688A (en) 1982-05-08

Family

ID=15499317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150550A Pending JPS5773688A (en) 1980-10-27 1980-10-27 Body passage detector

Country Status (1)

Country Link
JP (1) JPS5773688A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593189A (en) * 1983-11-09 1986-06-03 Siemens Gammasonics, Inc. Proximity detector for a body scanner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593189A (en) * 1983-11-09 1986-06-03 Siemens Gammasonics, Inc. Proximity detector for a body scanner

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