Doppler type ultrasonic flow meter

G - Physics – 01 – F

Patent

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Details

G01F 1/66 (2006.01)

Patent

CA 2557099

There is provided a Doppler type ultrasonic flowmeter (1) for measuring a flow rate of a fluid (10) by using an ultrasonic Doppler shift. A pair of ultrasonic transducers (3a, 3b) performs transmission of an ultrasonic wave and reception of an ultrasonic echo obtained by reflection of the ultrasonic wave. The transducers (3a, 3b) are arranged symmetrically on the extended line of the measurement line ML performing Doppler shift measurement so as to sandwich a center axis (5) of a pipe (2) in which the fluid (10) flows and to be positioned outside the pipe (2). The flow rate distribution for the side opposite to the side where the ultrasonic transducers (3a, 3b) are arranged about the center axis (5) of the pipe (2) is used for calculation of the flow rate of the fluid (10).

Il est prévu un débitmètre ultrasonique du type Doppler (1) pour la mesure d'un débit d'un fluide (10) en utilisant un décalage Doppler ultrasonique. Une paire de transducteur ultrasonique (3a, 3b) effectue la transmission d'une onde ultrasonique et la réception d'un écho ultrasonique obtenu par réflexion de l'onde ultrasonique. Les transducteurs (3a, 3b) sont disposés symétriquement sur la ligne étendue de la ligne de mesure ML effectuant la mesure de décalage Doppler de manière à sandwicher un axe central (5) d'une conduite (2) dans lequel le fluide (10) s'écoule et le positionner à l'extérieur de la conduite (2). La distribution de débit, pour le côté opposé au côté où les transducteurs ultrasoniques (3a, 3b) sont disposés autour de l'axe central (5) de la conduite (2), est utilisée pour le calcul du débit de fluide (10).

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