轨道几何特征匹配列车定位方法

Track geometry feature matching method for train positioning

轨道不平顺和轨距偏差等几何特征是直接反映轨道质量优劣的信息,它们均是轨道里程的函数,包含了丰富和低成本的位置信息,在重复观测中具有一致性。本文对轨道几何特征匹配列车定位方法的可行性进行了评估,建立了存储于计算机的背景数据库,然后通过采集待匹配数据和背景数据库进行匹配比对,获得了满足精度要求的列车位置。该方法为多传感器融合的列车控制系统提供了一种新的定位信息和思路,可以作为提高列车定位系统稳健性的辅助手段。

Geometric features such as track irregularity and gauge deviation are information that directly reflects track quality.They are all functions of track mileage and contain abundant and low-cost position information,which are consistent in repeated observations.In this paper,the feasibility of the train positioning method based on track geometry feature matching is evaluated,and the background database stored in the computer is established.By collecting the data to be matched and matching it with the background database,the train position which meets the accuracy requirement is obtained.This method provides a new positioning information and idea for multi-sensor fusion train control system and can be used as an auxiliary means to improve the robustness of train positioning system.