Apparatus and method for measuring parameters of a mixture...

G - Physics – 01 – F

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G01F 1/74 (2006.01) G01F 1/66 (2006.01) G01F 1/708 (2006.01) G01F 1/712 (2006.01)

Patent

CA 2474071

An apparatus 10,70 and method is provided that includes a spatial array of unsteady pressure sensors 15 - 18 placed at predetermined axial locations x1 - xN disposed axially along a pipe 14. For measuring at least one parameter of a solid particle/fluid mixture 12 flowing in the pipe 14. The pressure senors 15 - 18 provide acoustic pressure signals P1(t)-PN(t) to a signal processing unit 30 which determines the speed of sound amix of the particle/fluid mixture 12 in the pipe 14 using acoustic spatial array signal processing techniques. The primary parameters to be measured include fluid/particle concentration, fluid/particle mixture volumetric flow, and particle size. Frequency based sound speed is determined utilizing a dispersion model to determine the parameters of interest.

L'invention concerne un procédé et un appareil (10, 70) qui comprend un réseau spatial de capteurs de pression variable (15 -18) placés axialement en des points prédéterminés x¿1?-x¿n? le long d'un tuyau (14) pour mesurer au moins un premier paramètre d'un mélange solide particules/fluide (12) circulant dans le tuyau (14). Les capteurs de pression (15-18) envoient des signaux de pression acoustique P¿1?(t)-P<SB>N</SB>(t) à une unité de traitement de signaux (30) qui, au moyen de techniques de traitement de signaux de réseau spatial acoustique, détermine la vitesse du son a¿mix? du mélange particules/fluide (12) dans le tuyau (14). Les paramètres primaires à mesurer comprennent la concentration fluide/particules, l'écoulement volumétrique fluide/particules, et la taille des particules. La mesure de la vitesse du son exprimée en fréquences à l'aide d'un modèle de dispersion permet de déterminer les paramètres recherchés.

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