A method of measuring a river horizontal average flow velocity

G - Physics – 01 – F

Patent

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G01F 1/66 (2006.01) G01F 1/00 (2006.01)

Patent

CA 2277626

A method of measuring a horizontal average flow velocity at a plurality of depths using an ultrasonic beam to obtain the flowrate of a river comprises steps of emitting continuous ultrasonic beams along a selected flowrate measuring free crosssection from one skirt of a river and measuring a moving distance of paired ultrasonic receiving transducers spaced away in an interval from each other until the outputting voltages of the paired ultrasonic receiving transducers become equal to each other and then measuring a horizontal average flow velocity, in which the paired ultrasonic receiving transducers are electrically connected to differential amplifiers in order to measure the position at a moment that their outputting voltage differences becomes zero, and furthermore steps of testing and correcting an apparatus for performing the method.

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