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 inspectedInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-08-25 JP JP62209309A patent/JPS6454239A/en active Pending
Patent Citations (2)
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)
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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