Research on Derailment Detection Technology of Railway Vehicles Based on Characteristic Physical Quantities
In recent years,railway vehicles have developed rapidly,but the accompanying safety problems have also attracted more and more social attention.Among them,the derailment problem has undoubtedly become the focus of attention,so the research on the derailment detection technology of railway vehicles is of great significance.After a long period of exploration and research,when the predecessors used the classical derailment coefficient,wheel load reduction rate and other indicators to determine whether the railway vehicle was facing the risk of derailment,there were problems such as difficulty in detecting the wheel-rail force of the daily operating vehicle and lagging information transmission.In view of the above problems,this paper first carries out the simulation experiment of railway vehicle derailment,and determines the characteristic physical quantities of derailment,namely,lateral acceleration and roll angle of wheelset,which are significant and easy to measure.Secondly,the composite sensor is used to detect the running state of the wheel set in the simulation.By detecting the state of the wheel set in real time,an online detection scheme for derailment is designed.Then,based on the simulation experiment of railway vehicle derailment,the observation threshold corresponding to the derailment of wheelsets running on straight and curve conditions is analyzed,and the additional roll angle introduced by the superelevation of the vehicle running on the curve section is compensated.Finally,Finally,a set of derailment detection and early warning system is designed according to the derailment detection scheme,and the feasibility and effectiveness of the design scheme are verified by simulation examples.The research results show that the designed derailment detection technology scheme can effectively detect the derailment fault of the vehicle,effectively support the development of the derailment warning system,and achieve the purpose of protecting the safety of passengers and vehicles.This research has certain value for the rapid and safe development of railway vehicles,and it is a derailment detection technology for railway vehicles.
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