JPS6454239A - Detection of foreign matter in inner surface of object to be inspected - Google Patents

Detection of foreign matter in inner surface of object to be inspected

Info

Publication number
JPS6454239A
JPS6454239A JP62209309A JP20930987A JPS6454239A JP S6454239 A JPS6454239 A JP S6454239A JP 62209309 A JP62209309 A JP 62209309A JP 20930987 A JP20930987 A JP 20930987A JP S6454239 A JPS6454239 A JP S6454239A
Authority
JP
Japan
Prior art keywords
piping
inspected
foreign matter
fluid
infrared
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
JP62209309A
Other languages
Japanese (ja)
Inventor
Toshio Koshihara
Rokuro Misawa
Yuzo Sagawa
Kimio Takehara
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP62209309A priority Critical patent/JPS6454239A/en
Priority to US07/227,366 priority patent/US4872762A/en
Priority to EP88112816A priority patent/EP0304708A3/en
Priority to CA000574016A priority patent/CA1290421C/en
Publication of JPS6454239A publication Critical patent/JPS6454239A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable detection of a foreign matter existing in contact with the inner surface of an object to be inspected as infrared image, by a method wherein the object being inspected is heated from the outer surface thereof, heating is stopped to deprive the object being inspected of heat with the fluidization of a fluid on the inner surface side thereof to be taken with an infrared camera on the outer surface thereof. CONSTITUTION:While an infrared camera head 3 of an infrared video device 2 is directed to the outer surface of a piping 1 as object to be inspected from one way, the piping 1 is heated almost evenly with a heater 7 in a range 6 of photographing the outer surface of the piping 1 held in a screen of a monitor TV and in the perimeter thereof. Then, the heating is stopped to take the outer surface of the piping 1 with the camera head 3 in the photographing range 6 heated. here, an internal fluid 9 flows through the piping 1 to deprive the piping 1 of heat from the inner surface side thereof. The piping 1 is deprived of heat by the fluid 9a passed from the inner surface side thereof at a portion 1b of the pipe wall with a foreign matter 8 in the inner surface less than at a portion 1a of the pipe wall without the foreign matter 8 thereon and appears as temperature difference on the outer surface of the pipe. This enables detection of the foreign matter 8 on the inner surface of the piping 1 as infrared image by photographing the outer surface of the piping 1 with the infrared camera head 3 immediately after the passage of the fluid.
JP62209309A 1987-08-25 1987-08-25 Detection of foreign matter in inner surface of object to be inspected Pending JPS6454239A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62209309A JPS6454239A (en) 1987-08-25 1987-08-25 Detection of foreign matter in inner surface of object to be inspected
US07/227,366 US4872762A (en) 1987-08-25 1988-08-02 Method and apparatus for detecting defective portion on inner surface of pipe
EP88112816A EP0304708A3 (en) 1987-08-25 1988-08-05 Apparatus for detecting defective portion on inner surface of pipe
CA000574016A CA1290421C (en) 1987-08-25 1988-08-05 Method and apparatus for detecting defective portion on inner surface ofpipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62209309A JPS6454239A (en) 1987-08-25 1987-08-25 Detection of foreign matter in inner surface of object to be inspected

Publications (1)

Publication Number Publication Date
JPS6454239A true JPS6454239A (en) 1989-03-01

Family

ID=16570821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62209309A Pending JPS6454239A (en) 1987-08-25 1987-08-25 Detection of foreign matter in inner surface of object to be inspected

Country Status (1)

Country Link
JP (1) JPS6454239A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006045421A1 (en) * 2006-09-26 2008-04-03 Volkswagen Ag Cooling air duct through cooler package for use in motor vehicle, has air conducting device with movable cooling air flap that opens or blocks bypass that is arranged parallel to heat exchanger, based on arrangement and cooling air speed

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4889783A (en) * 1972-02-25 1973-11-22
JPS61120950A (en) * 1984-11-19 1986-06-09 Shimadzu Corp Inspection for inside of piping

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4889783A (en) * 1972-02-25 1973-11-22
JPS61120950A (en) * 1984-11-19 1986-06-09 Shimadzu Corp Inspection for inside of piping

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006045421A1 (en) * 2006-09-26 2008-04-03 Volkswagen Ag Cooling air duct through cooler package for use in motor vehicle, has air conducting device with movable cooling air flap that opens or blocks bypass that is arranged parallel to heat exchanger, based on arrangement and cooling air speed

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