城市轨道交通NTP时间服务器的研究与设计  

Research and Design of NTP Time Server for Urban Mass Transit

作　　者：武晓春[1] 黎磊[1] 张壮 

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]乌鲁木齐城市轨道集团有限公司,新疆乌鲁木齐830026

出　　处：《兰州交通大学学报》2013年第4期18-22,共5页Journal of Lanzhou Jiaotong University

摘　　要：根据城市轨道交通控制系统的控制中心与车站的二级控制模式,设计了基于NTP的时间同步网络结构.采用基于S3C2410的ARM9开发板,并扩展串口和增加Zigbee无线传输模块,设计了一套基于嵌入式Linux的城市轨道交通NTP时间服务器.服务器通过GPS接收机采用NMEA-0183协议获取GPS卫星的高精度时间信息,通过Ethernet接口和NTP协议为网络内的计算机提供精确的授时服务.根据NTP授时原理,设计了客户端和服务器端的校时程序,其中Windows下的NTP客户端授时精度可达10ms,能够满足轨道交通行车控制和运营管理的特定要求.According to the two-level control mode of the control center and the station of the urban mass transit control system,the structure of the time synchronization network based on Network Time Protcol and embedded Linux NTP time server for uban mass transit is designed. By employing ARM9 development board based on S3C2410 which expands the serial ports and increases the Zigbee wireless module, a NTP time server based on embedded Linux for urban mass transit is designed. The server gets high-precision GPS satellite time information via GPS receiver by using the NMEA-0183 protocol and also supplies pre- cisely synchronized timing services for the computers within the network via the Ethernet Interface and NTP network time service protocol. According to NTP timing principle, the timing program of the client and server is designed, in which the timing accuracy of NTP client under Windows reaches 10 ms. It can meet the specific requirements for control and operational management of urban mass transit.

关 键 词：城市轨道交通 嵌入式 NTP协议 时间服务器 

分 类 号：U239.5[交通运输工程—道路与铁道工程]