基于自适应滤波技术的激光-电磁超声检测噪声抑制方法  

Investigation on the Method of Suppress Noise in the Laser-EMAT Testing Based on Adaptive Filter Technology

作　　者：赵扬[1,2] 郭锐[1] 宋江峰[1] 马健[1] 刘帅[1] 孙继华[1,2] 贾中青[1,2] 

机构地区：[1]山东省科学院激光研究所,济南250014 [2]山东省无损检测工程技术研究中心,济南250014

出　　处：《无损检测》2013年第6期29-31,共3页Nondestructive Testing

基　　金：国际科技合作基金资助项目(2010DFR50240);山东省优秀中青年科学家科研奖励基金资助项目(BS 2011ZZ016);山东省科学院青年基金资助项目(2012-02)

摘　　要：介绍了一种基于LMS(Least mean square)算法的自适应滤波技术,该技术适用于激光-电磁超声检测(EMAT)过程中的噪声抑制。选择6016铝板表面裂纹的超声检测信号作为信号处理对象,采用Matlab设计的LMS自适应数字滤波器并对信号进行处理,结果表明该技术能够有效提高检测信号的可识别性,在激光-电磁超声工程应用领域中具有良好的应用前景。Introduces the adaptive filter technique based on the least mean square algorithm. The proposed method is applicable to the noise suppression during the detection process of the laser-EMAT technique. Experiments have been carried out on the 6016 aluminum plate, and the ultrasonic signal of surface defect has been processed by I.MS adaptive digital filter designed by MATLAB. The results show that the technique can improve the identification ability of defect signal. The technique has good prospects in the engineering applications of laser- EMAT testing.

关 键 词：激光超声 电磁超声 无损检测 自适应滤波 最小均方算法 

分 类 号：TG115.28[金属学及工艺—物理冶金] O614.412[金属学及工艺—金属学]