Hybrid laser ultrasonic inspection based on optical fiber technique

作     者：赵扬 崔雷 孙继华 马健 贾中青 

作者机构：Laser Institute of Shandong Academy of Sciences Jinan 250014 China Shandong Academy of Sciences Jinan 250014 China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2014年第12卷第A01期

页      面：69-70页

核心收录：

学科分类：080503[工学-材料加工工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0803[工学-光学工程] 080201[工学-机械制造及其自动化] 

基　　金：This work was supported by the National Natural Science Foundation of China (No.51205240)  Out- standing Young Scientists Program of Shandong (No.BS 2011ZZ016)  and Youth Science Funds of Shan- dong Academy of Sciences (No.2012-02) 

主　　题：110.5125 Photoacoustics 170.1065 Acousto-optics 220.4840 Testing 070.1060 Acousto-optical signal processing 

摘      要：Laser generation and electromagnetic acoustic transducer （EMAT） detection techniques are combined as a hybrid ultrasonic technique for the inspection of the defects in the steel. Laser transmits through the optical fiber and irradiates on the steel surface. In case of inspection, Rayleigh wave is generated to test the surface defects based on the principle of mode conversion. In order to improve the testing accuracy and signal-to- noise ratio, wavelet soft-threshold method is introduced in the present work. Experimental results show that errors of testing surface defect are less than 10%, which proves laser-EMAT technique to be suitable for non- destructive assessment of metallic materials.