基于磁致伸缩效应的超声导波在管道检验中的应用  

作　　者：辛军[1] 

机构地区：[1]北京市特种设备检测中心

出　　处：《中国特种设备安全》2012年第4期37-40,共4页China Special Equipment Safety

摘　　要：本试验研究了基于肱致伸缩效应的超声导波技术在涂刷防腐层管道及实际管道检测中的检测能力。在试验过程中传感器与管道之间采用机械干耦合方式，控制传感器单向激励低频T（O.1）模态超声导波。试验表明随着防腐漆厚度的增加，传感器激励信号的衰减在数值上呈下降趋势。对现场蒸汽管道的检测实验，得出单向激励64kHz，T（O.1）模态超声导波能够检测到管道长度内的焊缝、支架、弯头等管道典型结构。The ability of ultrasonic guided wave inspection of pipeline and anti-corrosion coating pipeline using the magnetostrictive sensor technology is studied experimentally. T （0, l） mode ultrasonic guided waves of low frequency of uni-directional excitation signal by mechanical dry coupling method between sensor and the pipe during the test. It showed that with the anti-corrosion coating thickness increasing, the attenuation of the sensor excitation signal has a downward trend. The typical structures of stream pipes such as the welds, stents and elbows of the pipes can be well detected at T （0, l） mode at 64 kHz.

关 键 词：管道检验 超声导波 磁致伸缩效应 应用 试验过程 激励信号 检测能力 传感器 

分 类 号：TE973.6[石油与天然气工程—石油机械设备]