排水管道声呐成像检测中换能器阻抗匹配技术研究OA北大核心CSTPCD

In allusion to the current problems of sonar detection signals being prone to oscillation and tailing,low efficiency of electroacoustic energy exchange,and difficulty in distinguishing sonar detection images in drainage pipelines,the core technology of impedance matching for integrated sonar transducers is researched emphatically,and the detailed research was conducted from three aspects:equivalent circuit modeling of sonar transducers,impedance matching network design,and circuit implementation and testing.The comparative analysis was conducted on the testing results of sonar transducers before and after the addition of impedance matching circuits.The results show that the designed impedance matching circuit is simple and effective,the sonar imaging images is clear,and the quantitative analysis error rate of sonar imaging detection results is low.The error rates of sonar detection quantities for the length,width,and diagonal distance of the tested object are 1.04%,1.71%,and 1.37%,respectively,which met the latest industry technical standards.The research findings can improve the detection ability of drainage pipeline diseases,which is of great significance for the prevention and control of urban waterlogging disasters.