G - Physics – 01 – N
Patent
G - Physics
01
N
340/124.6
G01N 25/72 (2006.01)
Patent
CA 1290421
METHOD AND APPARATUS FOR DETECTING DEFECTIVE PORTION ON INNER SURFACE OF PIPE ABSTRACT OF THE DISCLOSURE A method and an apparatus for detecting a defec- tive portion on the inner surface of a pipe, the outer surface of which is exposed, which comprises: heating or cooling a pipe, the outer surface of which is exposed, from the side of the outer surface thereof or the inner surface thereof so that a difference in temperature is produced between a portion of the outer surface of the pipe corresponding to an accumulation of foreign matters or a thinner portion as a defective portion on the inner surface thereof and a portion of the outer surface of the pipe corresponding to a normal portion of the inner surface thereof; then shooting the outer surface of the pipe by means of a thermal imaging system while the above-mentioned difference in temperature still remains on the outer surface of the pipe to obtain a thermal image of the difference in temperature; and detecting the accumulation of foreign matters or the thinner portion as the defective portion on the inner surface of the pipe by means of the thus obtained thermal image.
574016
Ishihara Koji
Koshihara Toshio
Matoba Yuji
Misawa Rokurou
Sagawa Yuzo
Ishihara Koji
Koshihara Toshio
Macrae & Co.
Matoba Yuji
Misawa Rokurou
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