| 摘要 |
<p>An ultrasonic, flow measuring device including a measuring tube and at least two ultrasonic transducers having, in each case, two electrical connections. The ultrasonic transducers are arranged in or on the measuring tube for determining the flow velocity and/or the volume flow of a medium flowing through the measuring tube based on the travel-time difference method. The flow measuring device has an electrical circuit for operating the ultrasonic transducer. A first ultrasonic transducer of the two ultrasonic transducers is switchable in such a manner that, under action of an exciter signal, it emits an ultrasonic signal into the medium, and a second ultrasonic transducer of the two ultrasonic transducers is switchable in such a manner that, upon arrival of the ultrasonic signal, it returns a received signal, characterized in that the circuit includes at least one connection to one of the connections of one of the two ultrasonic transducer, in order that the ultrasonic transducer can be short-circuited for preventing a disturbance signal.</p> |
