【作者】 徐琰锋； 胡文祥； 王浩；

【Author】 XU Yan-feng;HU Wen-xiang;WANG Hao;School of physics,Tongji University;

【机构】 同济大学物理科学与工程学院；

【摘要】 搭建二分量激光超声检测系统,同时检测面内和离面位移。实验检测铝块偏背中心的二分量信号,结果与数值计算一致。以此为基础讨论二分量检测技术在无损检测领域的应用,包括去除逆时偏移超声成像中的伪像,以及使用Lamb波的面内位移检测金属薄板的表面缺陷,说明了较单分量方法的优越性。更多还原

【Abstract】 A two-component laser ultrasonic detection system is set up and used to detect simultaneously in-plane and out-of-plane displacements.The two-component displacement of the off-epicenter of aluminium sample is measured.Experimental results are in agreement with numerical solution.In addition,the application of two-component detection technique in Non-destructive test is discussed in this paper.These applications include that the artifact removing in ultrasonic image using reverse time migration and surface defect detection in a metal plate using in-plane displacement.更多还原