The Research And Application Of WJ-8 High-speed Rail Fastener Detection

In all the ways of transportation,railway transportation,due to its huge capability and low cost,plays an important role in national economy construction and development.As the basis and premise of railway transportation,the safety of railway is the eternal theme for railway development,and railroad rail is the important component of railway,its status and performance has a direct link with the capacity and safety of the train.Fastener is the connection of railroad rail and sleeper,its function is to fasten the railroad rail to the sleeper,to prevent the horizontal movement of the railroad rail and keep the track gauge.At present,the domestic fastener mainly depends on manual detection using feeler detection,which is low-efficiency and incurs heavy workload.In order to make up for the shortage of artificial detection,this paper proposes a new method--using laser technology to develop a set of automatic testing system for fasteners.The application of the two dimensional laser sensor’s unique measuring mechanism,combined with the industry standard wear measurement standard to achieve the detection of fastener state,it can get the section outline of the fastener quickly.For the reason that the types of fasteners is various,this article take WJ-8 fasteners as the research object,and automatically detect the feasibility of fasteners.Lately can according to different types of fasteners set the parameters.In this paper we used two-dimensional line laser to scan the cross section,then we will receive the data points,and then process the data by some algorithms,such as denoising,filtering and feature extraction algorithms,then convert the measured data to the fastener tighten aperture value.At last completed the system research include the system design,mechanical structure design,data collection,data processing,and user interface design and the uncertainty analysis of the instrument,the reliability analysis of the automatic testing equipment.In order to test the effect of fastener automatic detection.In this paper,under laboratory conditions,According to the processing results of the feature position data and the non-feature position data of prototype software system,This proves that its measurement results meet the expected accuracy.