Flow meter assembly, gate assemblies and methods of flow measurement

摘要

The present invention provides an acoustic flow meter assembly (2) for pipes or open channels, said assembly including a frame (24) with a predetermined geometry. The frame has at least one user accessible port (36-42) with the at least one user accessible port (36-42) adapted to receive an interchangeable cartridge (44) which contains at least one acoustic transducer (46) to measure fluid velocity through said frame (24).

主权项

1. A method of measuring fluid velocity in a pipe or open channel, said method including the steps of:
providing a timing circuit which includes a first circuit having at least one upstream acoustic transducer and a second circuit having at least one downstream acoustic transducer; measuring a time delay in detecting an acoustic signal from said at least one upstream acoustic transducer to said at least one downstream acoustic transducer from said first circuit; measuring a time delay in detecting an acoustic signal from said at least one downstream acoustic transducer to said at least one upstream acoustic transducer from said second circuit; measuring a time delay in said first circuit when said at least one upstream acoustic transducer is bypassed in said first circuit; measuring a time delay in said second circuit when said at least one downstream acoustic transducer is bypassed in said second circuit and calculating said fluid velocity using said measurements.