Method and apparatus for detecting leaks and other defects...

Details Method and apparatus for detecting leaks and other defects... Method and apparatus for detecting leaks and other defects...

G - Physics

01

N

354/29, 350/32,

G01N 21/88 (2006.01) G01M 3/00 (2006.01) G01M 3/38 (2006.01)

Patent

CA 1272778

ABSTRACT A method for detecting leaks and other defects on inspection of underground sewers and the like channels, wherein a movable detecting and inspection unit com- municating with an above ground localized central unit is moved along the sewer and scans the inside of the sewer with the aid of an IR scanning unit or the like. The scanning unit registers and senses temperatures deviating from the prevailing temperature of the inside of the sewer or the like caused by ground or surface water flowing or leaking in, and conveys to the central unit signals indicating sensed temperatures. A metering device connected to the scanning unit simultaneously sends information on distance moved. Signals and information received in the central unit are processed to give a thermal picture and location indication.

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