Method for detecting a state of substance existing in pipe

Details Method for detecting a state of substance existing in pipe Method for detecting a state of substance existing in pipe

G - Physics

01

N

340/124.4

G01N 25/00 (2006.01) G01N 25/72 (2006.01)

Patent

CA 1294018

METHOD FOR DETECTING A STATE OF SUBSTANCE EXISTING IN PIPE ABSTRACT OF THE DISCLOSURE A method for detecting a state of a substance existing in 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 so that a difference in temperature is produced between a portion of the outer surface of the pipe corresponding to a portion of the inner surface there- of, which is in contact with a solid or liquid substance existing in the pipe, and a portion of the outer surface of the pipe corresponding to a portion of the inner surface thereof, which is not in contact with the substance; 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 a state of the substance existing in the pipe by means of the thus obtained thermal image. - 1 -

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