High-precision laser monitoring system with enhanced non-uniform scanning for railway safety  

作　　者：Yingying Yang Cheng Wang Xiaoqi Liu Yu Liu Weier Lu Zhonglin Zhu Hongye Yan Guotang Zhao Xuechun Lin 

机构地区：[1]Laboratory of All‑Solid‑State Light Sources,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]China State Railway Group Co.,Ltd.,Beijing 100844,China [3]School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China [4]Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100029,China [5]Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China

出　　处：《Railway Engineering Science》2025年第1期79-93,共15页铁道工程科学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.62275244,62375258,62225507,U2033211,62175230,and 62175232);the CAS Project for Young Scientists in Basic Research(No.YSBR-065);Scientific Instrument Developing Project of the Chinese Academy of Sciences(No.YJKYYQ20200001);National Key R&D Program of China(No.2022YFB3607800,No.2022YFB3605800,and No.2022YFB4601501);Key Program of the Chinese Academy of Sciences(ZDBS-ZRKJZ-TLC018)。

摘　　要：The intrusion of obstacles onto railway tracks presents a significant threat to train safety,characterized by sudden and unpredictable occurrences.With China leading the world in high-speed rail mileage,ensuring railway security is paramount.The current laser monitoring technologies suffer from high false alarm rates and unreliable intrusion identification.This study addresses these issues by investigating high-resolution laser monitoring technology for railway obstacles,focusing on key parameters such as monitoring range and resolution.We propose an enhanced non-uniform laser scanning method,developing a laser monitoring system that reduces the obstacle false alarm rate to 2.00%,significantly lower than the 20%standard(TJ/GW135-2015).This rate is the best record for laser monitoring systems on China Railway.Our system operates seamlessly in all weather conditions,providing superior accuracy,resolution,and identification efficiency.It is the only 3D LiDAR system certified by the China State Railway Group Co.,Ltd.(Certificate No.[2023]008).Over three years,our system has been deployed at numerous points along various lines managed by the China State Railway Group,accumulating a dataset of 300,000 observations.This extensive deployment has significantly enhanced railway safety.The development and implementation of our railway laser monitoring system represent a substantial advancement in railway safety technology.Its low false alarm rate(2.00%),high accuracy(20 cm×20 cm×20 cm),and robust performance in diverse conditions underscore its potential for widespread adoption,promising to enhance railway safety in China and internationally.

关 键 词：Laser monitoring technology Non-uniform laser scanning method False alarm rate Railway safety 

分 类 号：F53[经济管理—产业经济]