Method of measuring flow, and flow meter

Details Method of measuring flow, and flow meter Method of measuring flow, and flow meter

G - Physics

01

F

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

Patent

CA 2295077

The invention relates to a method of measuring the flow in a dielectric pipe (18) and to a flow meter. Two microwave signals at different frequencies and modulated and/or polarized in different ways are transmitted at measurement points via at least two transmitter antennae (12 to 13) through the dielectric pipe (18) and a flowing material (19). The distance between the measurement points is known. The signals (20 to 21) that have passed through are received by receiver antennae (14 to 15) and signal cross correlation is formed by a correlator (17), the flow rate being determined on the basis of the best correlation result. The measurement result is improved by filtering and/or directing the signals (20 to 21).

Cette invention se rapporte à un procédé servant à mesurer l'écoulement dans un conduit diélectrique (18) et à un débitmètre. A cet effet, deux signaux à hyperfréquences différentes et modulés et/ou polarisés de différentes manières sont transmis aux points de mesure via au moins deux antennes émettrices (12 et 13) à travers le conduit diélectrique (18) et à travers la matière en écoulement (19). La distance entre le point de mesure est connue. Les signaux (20 et 21) qui ont passé sont reçus par des antennes réceptrices (14 et 15) et une corrélation croisée des signaux est formée par un corrélateur (17), le débit étant déterminé sur la base du meilleur résultat de corrélation. On améliore le résultat de la mesure en filtrant et/ou en dirigeant les signaux (20 et 21).

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