G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 3/24 (2006.01) F17D 5/02 (2006.01)
Patent
CA 2634739
A method of detecting leakage in a force main involves placing at least two spaced sensors on the force main. Liquid is pumped through the pipe by means of a pump. The pump is shut down for an interval of time, and during the period following pump shutdown while negative pressure is present in the pipe, signals are generated at the sensors due to noise or vibration resulting from fluid being drawn into the pipe. The position of a leak in the pipe is determined by correlating the leak noise signals generated while the pipe is under negative pressure. Alternatively, the invention can be applied to a pressurized pipe, in which case conditions of negative pressure can be deliberatively created for a period to draw in fluid from the outside.
Hunaidi Osama
Wang Alex
Marks & Clerk
National Research Council Of Canada
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