基于T(0,1)模态超声导波的输气管道腐蚀检测  

Detection of Gas Transmission Pipeline Corrosion Using Ultrasonic Guided Waves of T(0,1) Mode

作　　者：邹宁波[1] 谌海云[1] 刘全利 田芳[1] 赵松柏[1] 杜振华[1] 

机构地区：[1]西南石油大学电信院,成都610500 [2]中石油天然气管道科学研究院,廊坊065000

出　　处：《无损检测》2013年第9期19-22,68,共5页Nondestructive Testing

基　　金：四川教育厅重点科研资助项目(12ZA193)

摘　　要：介绍了超声导波的频散特性和输气管道腐蚀检测设备的构成,依据管道中导波的T(0,1)模态的非频散特性对低频段(70kHz以下)反射回波信号进行了动态频率分析。结果表明:该分析方法能够清晰辨别管道特征信号,可以精确定位腐蚀缺陷的位置。但是,由于回波信号的叠加,与较大三通管位于同一截面的腐蚀缺陷信号难以识别。As a new non-destructive detection mean, ultrasonic guide^wave technology is more and more widely used in pipeline inspectior~ The detection devices of ultrasonic guided waves and dispersive characteristics are introduced briefly. Based on the non-dispersion of T（0,1） mode, the reflected signals are analyzed with dynamic frequency in low frequency range（below 70 kHz） . The inspecting results show that the method can clearly identify the feature signals of pipeline and find out the accurate location of corrosion defect. Because of the superposition of reflected signals, the corrosion defects which are in the same section of asymmetric characteristics in pipeline are however difficult to distinguish.

关 键 词：超声导波 管道 缺陷 波形分析 

分 类 号：TG115.28[金属学及工艺—物理冶金]