| Citation: | XU Lijun, LIU Fulu, DING Yiqing, et al. Residual thickness detection of pipeline based on electromagnetic ultrasonic shear wave[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(9): 1767-1773. doi: 10.13700/j.bh.1001-5965.2022.0301(in Chinese)
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To accurately detect the residual thickness of pipeline, a non-contact pipeline thickness detection system based on the electromagnetic ultrasonic shear wave was designed. The system adopts a self-developed electromagnetic ultrasonic high-power excitation source and a transducer to generate shear wave, and the receiver is used to filter and process the echo voltage signal in real-time to obtain the accurate residual thickness of the aluminum pipe. The excitation coil parameters were optimized to improve the small-signal and low signal-to-noise ratio of the receiving signal. On this basis, the beam radiation of shear waves propagating within the pipe was analyzed. Based on the fact that the number of turns of the coil and the width of the coil are the majority influence factors to the peak-to-peak value of the echo signal and the SNR respectively, the transducer is designed and the residual thickness detection accuracy with the error less than 0.2% is achieved.
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