Patent ID: 7299705

Claim:
A flow measuring system for measuring the mass flow rate of an aerated fluid flowing in a pipe, the flow measuring system comprising: a meter having a pair of vibrating tubes wherein fluid flows therethrough, the meter providing a phase signal indicative of a phase difference between the pair of tubes, said tubes having an inward flow portion and an outward flow portion; a flow measuring device measuring the speed of sound propagating through the fluid at the inward flow portion and outward flow portion of a tube, the measuring device providing at least one of an SOS signal indicative of the speed of sound propagating through the fluid, a GVF signal indicative of the gas volume fraction of the fluid and a reduced frequency indicative of the reduced frequency of the fluid; and a processing unit determining a compensated mass flow rate measurement in response to at least one of the SOS signal, the GVF signal and the reduced frequency signal and the phase signal.