NDLI: Dynamic Rail-wear Inspecting System Based on Machine Vision

Content Provider	IEEE Xplore Digital Library
Author	Guoxin Li Chonglin Wang Jianhua Liu Wenxian Jin
Copyright Year	2007
Description	Author affiliation: China Univ. of Min. & Technol., Xuzhou (Guoxin Li; Chonglin Wang; Jianhua Liu)
Abstract	Inspecting rail-wear status is critical to guarantee high-speed running safety, proper maintenance schedule, and low operating costs. A dynamic inspecting system based on machine vision is presented using near-infrared laser line projector, CCD (Charged Coupled Device) camera and image processing technology for detection of rail wear parameters. The design of single-element laser-beam projector is described. The projector takes a Gaussian laser beam and expands it into a uniform intensity line. A calibration frame has been constructed to obtain system coefficients before detection. A DLT (Direct Linear Transformation) algorithm is analyzed and modified to correct the nonlinear lens distortion using a planar spot-grid. And hundreds of rail profile images have been acquisitioned and processed. At the same time, rail wear values have been obtained fast and accurately. It is testified that the whole system of rail wear reflects the status of rail profiles wear authentically and dependably. Having high performance /cost ratio, the system is much suitable for Chinese context.
Starting Page	1
Ending Page	4
File Size	849393
Page Count	4
File Format	PDF
ISBN	9781424407361
DOI	10.1109/ICIEA.2007.4318358
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-23
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Machine vision Rails Costs Laser noise Railway safety Charge coupled devices Optical coupling Charge-coupled image sensors Image processing Optical design
Content Type	Text
Resource Type	Article

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