管道中单向传播的电磁超声换能器检测研究  

Research on Testing of Electromagnetic Acoustic Transducer of Unidirectional Propagation in Pipe

作　　者：张佳 杨理践[1] 邢燕好[1] 高松巍[1] 赵璐[1] 谢哲 付宏文 ZHANG Jia;YANG Li-jian;XING Yan-hao;GAO Song-wei;ZHAO Lu;XIE Zhe;FU Hong-wen(School of Information Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Aerospace System Engineering Shanghai,Shanghai 201108,China)

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110870 [2]上海宇航系统工程研究所,上海201108

出　　处：《仪表技术与传感器》2021年第11期104-109,共6页Instrument Technique and Sensor

基　　金：辽宁省教育厅重点项目(201744115)。

摘　　要：针对常规电磁超声换能器检测时难以根据回波直接判定缺陷位置的问题,提出单向电磁超声导波换能器结构。建立波叠加数学模型,推导控制超声波传播方向与强度的参数。通过控制换能器双激励线圈的相对位置与延迟时间参数实现超声波强弱的控制。建立有限元仿真模型,验证理论分析的正确性。实验研究了不同参数对超声波幅值与方向控制的影响,验证了理论与仿真的正确性。结果表明:管道中单向电磁超声导波换能器产生单向超声导波,实现了管道检测中缺陷的精准识别与定位,增强了信号识别能力,提高了检测信号的信噪比,为管道缺陷检测提供了理论和实验依据。In order to solve the problem that it is difficult to determine the defect location directly according to the echo in conventional electromagnetic acoustic transducer testing,a unidirectional electromagnetic acoustic guided wave transducer structure was proposed.The mathematical model of wave superposition was established,and the parameters controlling the direction and intensity of ultrasonic propagation were deduced.The ultrasonic intensity was controlled by controlling the relative position and delay time parameters of the dual excitation coils of the transducer.The finite element simulation model was established to verify the correctness of the theoretical analysis.The influence of different parameters on the amplitude and direction control of ultrasonic wave was studied experimentally,and the correctness of theory and simulation was verified.Results show that the unidirectional electromagnetic acoustic guided wave transducer in the pipeline generates unidirectional ultrasonic guided wave,which realizes the accurate identification and positioning of defects in the pipeline inspection,enhances the signal recognition ability,improves the signal-to-noise ratio of the inspection signal,and provides theoretical and experimental basis for the pipeline defect inspection.

关 键 词：管道 电磁超声换能器 单向 控制 缺陷检测 

分 类 号：TB552[理学—物理]