Ultrasonic fluid flow measuring using an oscillating body and a coupling piece having a reduced cross section than the oscillating body

摘要

The flow speed of a fluid (12) flowing in a conduit (14) is measured using at least one ultrasonic transducer (18a-b) that is attached to the conduit wall (22) from the outside The transducer (18a-b) has an oscillating body (34) that couples to a part region (32) of the conduit wall (22) that acts as a membrane of the ultrasonic transducer (18a-b) that can vibrate. A coupling piece (36) whose cross-section is smaller than the cross-section of the oscillating body (34) is arranged between the membrane (32) and the oscillating body (34).