Patent ID: 6851322
Filing Date: 2005-02-08
Classification: G01F

Abstract:
1. A flowmeter for measuring the flow of fluid in a channel, said flowmeter comprising: (a) an isolating flow conditioner configured for installation in said channel for reducing flow swirl and asymmetry; (b) an ultrasonic measuring device configured for installation in the channel downstream from said conditioner wherein said ultrasonic measuring device has at least one chordal path between acoustic transducers for measuring transit times of acoustic pulses; and (c) a digital microprocessor disposed in communication with said ultrasonic measuring device and configured to receive output from said ultrasonic measuring device and convert said output to a velocity measurement by applying at least one correction factor selected from the group of correction factors consisting of: a weighting factor based upon geometry of the chordal path, a weighting factor based upon flow turbulence, a weighting factor based upon flow relaxation, and combinations thereof.