Design and Application of Ultrasound Stress Wave Signal Bandpass Filter

According to the features of ultrasound stress wave signal, adopting a simple and accurate web filter design software, a eight-order Butterworth bandpass filter with the frequency range between 50 kHz and 200 kHz is designed. Using the circuit simulation software (Multisim), the filter circuit is tested and verified, by continuously changing the value of resistance and capacitance and optimizing the filter performance. The simulation results meet the design demands, which proves the reliability of the design. Using Labview to establish the automatic test platform, improves the test efficiency and saves the labor cost. By applying the filter to the nuclear pipeline evaluation system for HPR1000, the sealing performance of the main pipeline and the surge pipeline is monitored in real time.