Velocity measurement system

Details Velocity measurement system Velocity measurement system

G - Physics

01

P

G01P 5/00 (2006.01) G01F 1/00 (2006.01) G01F 1/66 (2006.01) G01P 5/24 (2006.01) G01S 15/50 (2006.01)

Patent

CA 2074608

A sonic-type fluid flow measuring system wherein reflections or echoes of a burst (103) of ultrasonic en- ergy from an ultrasonic acoustic emitter (9a) are sensed and typically comprise a number of frequencies represen- tative of a number of discrete velocities of flow in a volume of fluid. A receiver transducer (13a) is gated to receive echoes from a selected volume of fluid (104) a selected distance from a transducer (13a). Thereafter, this time domain signal sample is converted to a frequen- cy domain sample whereby the presence and magnitude of each frequency component, or velocity component, is iso- lated, this being typically done by what is known as a Fast Fourier Transform unit, obtaining a frequency domain waveform representative of average flow velocity.

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