超声导波任意波形激励技术研究  

The technique of ultrasonic guided wave with arbitrary waveform excitation

作　　者：郑甜甜[1] 潘晓宇[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《电子设计工程》2016年第12期1-4,共4页Electronic Design Engineering

基　　金：国家自然科学基金(61134003)

摘　　要：高效准确的无缝钢轨温度应力检测与探伤是确保高速铁路安全运营的重要技术手段,近年来,基于超声导波的钢轨应力检测技术受到越来越大的关注,精确控制钢轨中导波的波形是该技术的关键,但目前得到的接收波形精确度却不高。本文利用超声导波换能器和时间反转法,通过ANSYS有限元仿真分析,获得了任意波形的激励信号,提高了接收波形与理想波形的相关度。仿真结果表明,由时间反转法得到的接收波形精确度提高了约12%。High efficiency and accurate seamless rail temperature stress detection and flaw detection is an important technology to ensure the safe operation of high speed railway. In recent years, the rail stress detection technology based on Ultrasonic guided wave has caused more and more attention, in which precise control of guided wave waveform in rail is the key. But at present the accuracy of received waveform is not high. Using ultrasonic guided wave transducer and time reversal method, the excitation signal of arbitrary waveform is gotand the correlation between received waveform andideal waveform is improvedby ANSYS finite element simulation. The simulation results show that the accuracy of the received waveform obtained by time reversal method is improved by about 12%.

关 键 词：超声导波换能器 时间反转法 波形 激励信号 

分 类 号：TN98[电子电信—信息与通信工程]