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Hybrid laser ultrasonic inspection based on optical fiber technique

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Abstract

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 nondestructive assessment of metallic materials.

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DOI:10.3788/col201412.s11102

所属栏目:Imaging systems

责任编辑:张雁

收稿日期:2013-12-13

录用日期:2014-01-20

网络出版日期:2014-03-25

联系人作者:联系作者(yang.aisin.zhao@gmail.com)

备注:This work was supported by the National Natural Science Foundation of China (No.51205240), Outstanding Young Scientists Program of Shandong (No.BS 2011ZZ016), and Youth Science Funds of Shandong Academy of Sciences (No.2012-02).

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引用该论文

Yang Zhao, Lei Cui, Jihua Sun, Jian Ma, Zhongqing Jia, "Hybrid laser ultrasonic inspection based on optical fiber technique," Chinese Optics Letters 12(s1), S11102 (2014)

CrossRef返回数据

【1】Yang Zhao, Jianwei Chen, Jihua Sun, Jiangfeng Song, Jian Ma, Shuai Liu, Yinian Zhu, J. Heled, A. Yuan. Applications of laser ultrasonic technique on nondestructive testing and evaluation of materials. MATEC Web of Conferences, 2018, 173(): 02033

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