Abstract
Rail surface scratching occurs with increasing frequency, seriously threatening the safety of vehicles and humans. Online repair of rail-surface scratches on damaged rails with scratch depths >1 mm is of increased importance, because direct rail-replacement has the disadvantages of long operation time, high manpower and high material costs. Advanced online repair of rail-surface scratch using three-dimensional (3D) metal printing technology such as laser cladding has become an increasing trend, desperately demanding a solution for the fast and precise establishment of a complete closed mesh model of rail-surface scratch data. However, there have only been limited studies on the topic so far. In this paper, the complete closed mesh model is well established based on a novel triangulation algorithm relying on the topological features of the point-cloud model (PCM) of scratch-data, which is obtained by implementing a scratch-data-computation process following a rail-geometric-feature-fused algorithm of random sample consensus (RANSAC) performed on the full rail-surface PCM constructed by 3D laser vision. The proposed method is universal for all types of normal-speed rails in China. Experimental results show that the proposed method can accurately acquire the complete closed mesh models of scratch data of one meter of 50 Kg/m-rails within 1 min.
Highlights
IntroductionThe railway industry has developed rapidly in China. The frequency and degree of rail rolling have increased sharply, and rail-surface scratches have become more and more aggravated [1,2]
In recent years, the railway industry has developed rapidly in China
The triangulation algorithm can convert the scratch-data point-cloud model (PCM) to the complete closed mesh model required for the online rail-repair by the laser cladding technology
Summary
The railway industry has developed rapidly in China. The frequency and degree of rail rolling have increased sharply, and rail-surface scratches have become more and more aggravated [1,2]. The precondition for online using laser rail-repair cladding technology is to cladding technology is to acquire the complete closed mesh model of the scratch data. A method for establishing a complete closed mesh model of the rail-surface scratch. A method for establishing a complete closed mesh model of the rail-surface scratch data is presented. The triangulation algorithm can convert the scratch-data PCM to the complete closed mesh model required for the online rail-repair by the laser cladding technology. Experimental results show our method performs well for the acquisition of a complete closed mesh model of the rail-surface (4) Experiments for verifying the proposed method are carried out. Section 4for presents the triangulation algorithm based the point-cloud topology
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
