Title of Paper:Evaluation of rail surface cracks using laser ultrasonic technique

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Affiliation of Author(s):自动化学院

Journal:Annu. Conf. Br. Inst. Non-Destr. Test., NDT

Abstract:In order to detect and evaluate rail surface fatigue cracks, this paper proposes a non-contact laser ultrasonic technique based on data fusion and wavelet packet analysis. The theory for defect depth detection using Rayleigh wave was described via finite element method. Experimental studies were implemented for verification. Results show the feasibility of laser ultrasonic configuration to evaluate defect depth. The rail-track cracks at different depths are well classified by the proposed data fusion algorithm and Kernel PCA under unsupervised condition. Defect quantitative evaluation considering the proposed method is discussed for future works.

Translation or Not:no

Date of Publication:2017-01-01

Co-author:江奕,tianguiyun,Yi, Qiuji,Gao, Yunlai,XT10058,xj

Correspondence Author:Haitao Wang