高铁隧道内基于北斗卫星的导航定位延伸系统硏究

Study of Extended Navigation and Positioning System for High-speed Tunnels Based on Beidou Satellite

为了满足高速铁路隧道内的列车定位需求,提出了高铁隧道内基于卫星导航的定位延伸技术。采用中国自行研制、安全可控的全球卫星定位北斗卫星导航系统(BDS),利用现有设施、设备、漏缆、交换机,增加卫星导航接收机、再生卫星信号源等设备,将隧道外北斗卫星导航定位信息二次处理后.实时同步到隧道内信号发射设备上,实现隧道内卫星导航信号全覆盖,连续实时定位、不失锁,保障移动终端卫星接收机正常连续工作,为高铁运营、实时监控提供全方位支撑。

In order to meet the requirements of train positioning in high speed railway tunnels,an extended technology of satellite navigation positioning in high-speed rail tunnels is proposed.The BeiDou satellite navigation system(BDS)»which is developed by China with the safely under control by itself,is adopted and equipped with extra satellite navigation receivers and regenerated satellite signal sources besides existing facility,equipment,leaky cable and switch.After post­processing of satellite navigation positioning data from the outside of the tunnel,the data is syn­chronized with the signal transmitting equipment in the tunnel in a real-time manner.Thus,the full coverage of satellite navigation signals in the tunnel will be realized and continuous real-time positioning with lock-lose can ensure continuously normal operation of the satellite receiver of the mobile terminal,providing all-around supports for the operation and real-time monitoring of high speed railway.