基于AD9850超声换能器的驱动和接收电路设计*

摘要

为了提高超声检测在海底声学测量中的测量精度，利用DDS芯片AD9850作为高精度信号源，并设计了超生换能器的驱动和接收电路。采用分频移相、光电隔离、功率放大的和阻抗匹配的方法对换能器进行驱动；用电荷放大器和带通滤波器对接收信号进行处理。实验结果表明，电路性能良好，满足测量要求。%In order to improve the measurement accuracy of ultrasonic testing on submarine acoustic measurements, this paper used the DDS chip AD9850 as a high-precision signal source,and designed the driver and receiver circuits of ultrasonic transducer. Some methods such as,frequency division,phase shift,optical isolation,power amplification and impedance matching,etc,were designed to drive the transducer,and then the reception signal was processed by charge amplifier and band-pass filter. Finally,experiment shows that the circuits not only were in good condition,but also met the measurement requirements.