JPS57194376A - Detection of foreign matter - Google Patents

Detection of foreign matter

Info

Publication number
JPS57194376A
JPS57194376A JP56079086A JP7908681A JPS57194376A JP S57194376 A JPS57194376 A JP S57194376A JP 56079086 A JP56079086 A JP 56079086A JP 7908681 A JP7908681 A JP 7908681A JP S57194376 A JPS57194376 A JP S57194376A
Authority
JP
Japan
Prior art keywords
memory
foreign matter
image signal
railroads
railroad
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
JP56079086A
Other languages
Japanese (ja)
Inventor
Shinzo Ueda
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.)
Kyosan Electric Manufacturing Co Ltd
Original Assignee
Kyosan Electric Manufacturing 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 Kyosan Electric Manufacturing Co Ltd filed Critical Kyosan Electric Manufacturing Co Ltd
Priority to JP56079086A priority Critical patent/JPS57194376A/en
Publication of JPS57194376A publication Critical patent/JPS57194376A/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 foreign matter of railroads easily with image recognition by simple constitution by comparing the recognized image of the railroads right after the passage of a train and the recognized image of the time when the next train approaches. CONSTITUTION:The image signal of railroads taken by a television camera 1 right after the passage of a train through a railroad which is an object to be detected of foreign matter is stored as the comparing reference image signal showing the normal state of the railroad in the 1st memory 8 by the output signal of a passage sensor 5. When the next train approaches, the comparing reference image signal stored in the memory 8 is transferred to the 2nd memory 9 and the image signal taken by the camera 1 at this time is stored in the 1st memory 8. The storage signals of the memory 8 and the memory 9 are compared by a comparator 10 and if there is a difference between both signals, it is detected that foreign matter exists on the railroad and an alarm is emitted by an alarm device 11.
JP56079086A 1981-05-25 1981-05-25 Detection of foreign matter Pending JPS57194376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079086A JPS57194376A (en) 1981-05-25 1981-05-25 Detection of foreign matter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079086A JPS57194376A (en) 1981-05-25 1981-05-25 Detection of foreign matter

Publications (1)

Publication Number Publication Date
JPS57194376A true JPS57194376A (en) 1982-11-29

Family

ID=13680067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079086A Pending JPS57194376A (en) 1981-05-25 1981-05-25 Detection of foreign matter

Country Status (1)

Country Link
JP (1) JPS57194376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS608769A (en) * 1983-06-29 1985-01-17 Fujitsu Ltd Object detector
WO1995016213A1 (en) * 1993-12-08 1995-06-15 Minnesota Mining And Manufacturing Company Method and apparatus for background determination and subtraction for a monocular vision system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635073B2 (en) * 1972-05-01 1981-08-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635073B2 (en) * 1972-05-01 1981-08-14

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS608769A (en) * 1983-06-29 1985-01-17 Fujitsu Ltd Object detector
WO1995016213A1 (en) * 1993-12-08 1995-06-15 Minnesota Mining And Manufacturing Company Method and apparatus for background determination and subtraction for a monocular vision system
US5684898A (en) * 1993-12-08 1997-11-04 Minnesota Mining And Manufacturing Company Method and apparatus for background determination and subtraction for a monocular vision system

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