Acoustic Flow Measurement Device Including a Plurality of Chordal Planes Each Having a Plurality of Axial Velocity Measurements Using Transducer Pairs

摘要

A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A plurality of axial velocity measurements are made in each chordal plane. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

主权项

1. An ultrasonic flow meter for measuring fluid flow in a conduit having a conduit axis comprising:
multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes, in each chordal measurement plane the multiple transducer pairs located in the chordal measurement plane are positioned to form acoustic transmission paths that traverse at least once from one side of the plane to another side of the plane, each traverse is either direct from one transducer to another or via one or more reflection points and whereby a plurality of axial velocity measurements are made in each chordal plane.