Patent ID: 6675661
Filing Date: 2004-01-13
Classification: G01F

Abstract:
Device for measuring the volume flow of a fluid in a pipe, comprising at least two objects with a different shape and/or diameter to be arranged in the pipe, a sensor means for determining the frequency with which vortices occur which arise behind the objects upon the fluid flowing round the objects, and means for determining the volume flow of the fluid from this frequency, wherein the sensor means comprises(a) at least first and second sensors for measuring the vortex frequencies (fv1 and fv2) corresponding with each of said at least two objects, and (b) a third sensor for determining a possible pulsation frequency arising in the approach velocity of the fluid, the difference in shape and/or diameter of the at least two objects being such that, at all possible pulsation frequencies, at least one of the vortex frequencies is independent of the pulsation frequency.