Patent ID: 6041663
Filing Date: 2000-03-28
Classification: G01F

Abstract:
Method for determining the flow velocity and throughput of a flowing fluid in a channel, by transmitting and receiving ultrasonic sound waves along a plurality of paths between transducers which are disposed along the periphery of the channel and act as transmitters and receivers, measuring the transit times of the sound waves transmitted in opposite directions along each of said paths, and determining the difference between the transit times thereof and calculating the flow velocity and throughput using multiplication factors, at least three paths being situated between two transducers for each path positioned at a distance from each other in the direction of flow of the fluid, wherein the paths comprise at least one first path through the centre of the channel, and at least one second path in the form of an inscribed triangle, and at least one third path with three or more reflections against the wall of the channel.