G - Physics – 01 – N
Patent
G - Physics
01
N
350/32, 340/124.
G01N 25/72 (2006.01)
Patent
CA 1306776
METHOD AND APPARATUS FOR DETECTING DEFECTIVE PORTION ON OUTER SURFACE NOT EXPOSED OF PIPE ABSTRACT OF THE DISCLOSURE A method and apparatus for detecting a de- fective portion on the outer surface not exposed of a pipe, which comprises: heating or cooling a pipe, the outer surface of which is not exposed, from the side of the inner surface thereof so that a difference in temperature is produced between a portion of the inner surface of the pipe corresponding to an accumulation of foreign matters or a thinner portion as a defective portion on the outer surface not exposed of the pipe and a portion of the inner surface of the pipe corresponding to a normal portion of the outer surface of the pipe; then shooting the inner surface of the pipe by means of a thermal imaging system while the difference in temperature still remains on the inner 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 outer surface of the pipe by means of the thus obtained thermal image.
593025
Hirashima Toru
Ishida Shunichiro
Ishihara Koji
Koshihara Toshio
Matoba Yuji
Hirashima Toru
Ishida Shunichiro
Ishihara Koji
Koshihara Toshio
Macrae & Co.
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