Patent ID: 7581453
Filing Date: 2009-09-01
Classification: G01F

Abstract:
1. An ultrasonic flow meter system comprising: transducers arranged with respect to a conduit to define at least one chordal path through fluid flowing in the conduit; at least one transmitting transducer and receiving transducer pair on the chordal path for generating a transit time signal; at least one receiving transducer positioned to receive scattered energy from any angle from point locations in the fluid to generate a range gated Doppler signal; a processing subsystem for exciting the at least one transmitting transducer and responsive to the transit time signal and the range gated Doppler signal and configured to generate a velocity profile and a mean velocity of the fluid flowing in the conduit; in which the receiving transducers output transit time and Doppler shift signals to the processing subsystem; in which the processing subsystem is configured to: in which the point locations are predetermined by using the sound speed.