换能器的单极脉冲及其频域特性

The Unipolar Ultrasonic Pulses and Frequency Band of Transducer

在超声波探伤领域，换能器的性能是关键因素之一。单极（半个周期的正弦信号）的声压脉冲和单极的接收电信号是一种理想情况，本文就单极脉冲的获得及其频域特性展开讨论。

For the purpose of improving transducer,we have carried out studies on generation of unioplar ultrasonic pulse. This paper use Mason equivalent circuit to calculate theunipolar ultrasonic pulses,and to studies on generation of unipolar ultrasonic pulses. Thetheoretical result and experimental result are in agreement.