Underground conduit defect localization

Details Underground conduit defect localization Underground conduit defect localization

G - Physics

01

F

G01F 1/66 (2006.01)

Patent

CA 2292009

The present invention relates to a method of determining the flow rate and direction of a medium within a conduit. The method is comprised the steps of coupling a pair of sensors to the conduit at a first and second location thereof. A first vibration is imposed upon the conduit at a position proximate a first sensor in the pair of sensors, the position being outside of a region located between the pair of sensors which are separated by a distance and mounted to the conduit. A first transmitted vibration is detected, propagating along the conduit in response to the imposed vibration at both sensors. The above defined steps are repeated wherein a second vibration is imposed at a second location proximate a second sensor in the pair of sensors, the position being outside of said region located between the pair of sensors. The center velocity of each transmitted vibration is determined by computing an envelope correlation function. The direction of fluid flow and the velocity of the medium within the conduit is then calculated.

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