%0 Journal Article
%T 基于缓冲波导的T(0,1)模态导波激励方法实验研究<br>Experimental study of the T(0,1)-wave excitation method based on a buffer waveguide
%A 孙斐然
%A 丁雨林
%A 孙振国
%A 陈强
%A MURAYAMA Riichi
%J 清华大学学报（自然科学版）
%D 2018
%R 10.16511/j.cnki.qhdxxb.2018.21.014
%X 缓冲波导是解决超声传感器在高温管道在线检测中失效问题的重要途径。针对已提出的通过在缓冲波导内产生S0模态的Lamb波，并利用缓冲波导与管道的连接耦合，间接激励出T（0，1）模态导波的方法，本文进行了实验研究，设计并研制了用于激励S0模态Lamb波的曲折型线圈电磁超声换能器和用于接收T（0，1）模态导波的周期性永磁铁阵列式电磁超声换能器。结果表明：S0模态的Lamb波通过缓冲波导后能够激励出T（0，1）模态的导波对管道进行检测，从而验证了该方法的有效性，并为该方法的工程应用奠定了基础。<br>Abstract：This paper presents an experimental study of the T(0,1) mode guided wave excitation method for a buffer waveguide wrapped around a pipe which has been proposed to overcome the main challenge in online inspection of high-temperature pipelines. The dispersion curve was analyzed in tests to show that the T(0,1) mode guided wave can be excited in the pipe by exciting the S0 mode Lamb wave in the buffer waveguide with a meander-line coil EMAT to generate the S0-wave and a PPM EMAT to detect the T(0,1)-wave. Tests indicate that the T(0,1)-wave can be converted from the S0-wave by the buffer waveguide, which verifies the validity of this method as a foundation for engineering applications.
%K 超声导波
%K 缓冲波导
%K T (0
%K 1)模态
%K 管道检测
%K 电磁超声换能器
%K 高温管道
%K &lt
%K br&gt
%K guided wave
%K buffer waveguide
%K T (0
%K 1) mode
%K pipe inspection
%K electromagnetic acoustic transducer (EMAT)
%K high-temperature pipe
%U http://jst.tsinghuajournals.com/CN/Y2018/V58/I8/740