Two-Dimensional Impact Reconstruction Method for Rail Defect InspectionReport as inadecuate




Two-Dimensional Impact Reconstruction Method for Rail Defect Inspection - Download this document for free, or read online. Document in PDF available to download.

Mathematical Problems in Engineering - Volume 2014 2014, Article ID 236574, 9 pages -

Research Article

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China

Department of Industry Manufacture, Chengdu University, Chengdu 610106, China

State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China

Received 2 May 2014; Accepted 27 June 2014; Published 17 July 2014

Academic Editor: Xuefeng Chen

Copyright © 2014 Jie Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The safety of train operating is seriously menaced by the rail defects, so it is of great significance to inspect rail defects dynamically while the train is operating. This paper presents a two-dimensional impact reconstruction method to realize the on-line inspection of rail defects. The proposed method utilizes preprocessing technology to convert time domain vertical vibration signals acquired by wireless sensor network to space signals. The modern time-frequency analysis method is improved to reconstruct the obtained multisensor information. Then, the image fusion processing technology based on spectrum threshold processing and node color labeling is proposed to reduce the noise, and blank the periodic impact signal caused by rail joints and locomotive running gear. This method can convert the aperiodic impact signals caused by rail defects to partial periodic impact signals, and locate the rail defects. An application indicates that the two-dimensional impact reconstruction method could display the impact caused by rail defects obviously, and is an effective on-line rail defects inspection method.





Author: Jie Zhao, Jianhui Lin, Jinbao Yao, and Jianming Ding

Source: https://www.hindawi.com/



DOWNLOAD PDF




Related documents