| 摘要 |
<p>A flow meter and a method of measuring flows, such as flows in liquids or gasses, are described, wherein ultrasonic signals are transmitted in two or more directions in different points - that is, one is detected before the next is transmitted - in time in order to, at a given transducer, remove the adverse effects of signals reflected back to a transducer reaching the transducer at the time it is to receive a signal. In addition, a measuring setup is described wherein varying impedances of the transducers are compensated for and wherein the impedances of the transmitting and the receiving electronics have no effect on the measurement. In this setup, the transmitting electronics and the receiving electronics are directly electrically connected, and the transducers are interconnected to this electrical interconnection.</p> |
