Apparatus and method for attenuating acoustic waves in...

G - Physics – 01 – F

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G01F 1/66 (2006.01) G01D 3/028 (2006.01) G01F 1/712 (2006.01)

Patent

CA 2658849

A method and apparatus for damping an ultrasonic signal propagating in the wall of a pipe (104), the apparatus including at least one damping structure (132) for securing at least one sensor to the wall of the pipe, wherein the at least one sensor includes a transmitter component (122) and a receiver component (124) for transmitting and receiving an ultrasonic signal, wherein the at least one damping structure is associated with the outer wall of the pipe for damping the ultrasonic signal propagating within the wall of the pipe and a processor that defines a convective ridge in the k-ω plane in response to the ultrasonic signals, and determines the slope of at least a portion of the convective ridge to determine the flow velocity of the fluid.

L'invention concerne un procédé et un appareil pour amortir un signal ultrasonore se propageant dans la paroi d'un tube, l'appareil comprenant au moins une structure d'amortissement pour fixer au moins un capteur à la paroi du tube, le ou les capteurs comprenant un composant transmetteur et un composant récepteur pour transmettre et recevoir un signal ultrasonore, la ou les structures d'amortissement étant associées à la paroi externe du tube pour amortir le signal ultrasonore se propageant à l'intérieur de la paroi du tube et un processeur qui définit une crête de convexion dans le plan k-.omega. en réponse aux signaux ultrasonores et déterminent la pente d'au moins une partie de la crête de convexion pour déterminer la vitesse d'écoulement du fluide.

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