摘要
行车限界内的崩塌落石灾害监测是保障山区铁路行车安全的重点研究课题.若干基于单信号特征的监测方法已经投入应用,其固有的误报率和漏报率超出了铁路运输所能容忍的限度.考虑到崩塌落石会产生侵限目标和冲击波等多种信号特征,提出了一种基于复合信号特征的监测方法,对信号源不同的多种信号特征进行提取,同时要求这些特征必须具备高度的时空域相关性.理论分析和各山区路局的实践表明,此方法可以使监测系统的误报率和漏报率同时降低到若干数量级以下.
Rockfall hazard surveillance inside traffic clearance is an important research issue for railway transportation safety in mountain area.Some single-feature-based detecting methods have been proposed and practiced,whose intrinsic False-positive-ratio （FPR） and False-negative-ratio （FNR） are worse than railway transportation can tolerate.Considering the fact that rockfall on railway line produces various signal features including object appearance and impulse wave,a composite-feature-based detecting method which imposes spatiotemporal constraint on features extracted from multiple signal sources is proposed.Theoretical analysis and practice in mountain railway show that FPR/FNR with several orders lower can be obtained simultaneously.
出处
《武汉理工大学学报（交通科学与工程版）》
2013年第5期1113-1118,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
铁道部科技司科技研究开发计划项目重点课题2005G007"高危路段线路障碍自动监测预警技术研究"
2010G018-E-4"艰险困难山区高速铁路综合技术研究-高陡边坡运营安全防灾监控及报警系统技术研究"
2011G017-A"铁路防灾减灾技术深化研究--铁路防洪安全检测监控"资助
关键词
铁路行车安全
崩塌落石监测
复合信号特征
红外激光测量
冲击波定位
railway transportation Safety
tockfall hazard surveillance
composite feature
infrared laser measuring
impulse relocation
