基于光通信的计算机半自动闭塞系统研究与实现

Research and Implementation for Computerized Semi-automatic Block System Based on Optical Fiber Communication

针对既有继电半自动闭塞系统存在的传输电缆老化、可维护性差等问题,提出计算机半自动闭塞系统技术升级方案。该系统采用2乘2取2安全计算机平台架构,实现主、备系间的安全切换;采用安全计算机技术替代既有继电器电路,实现闭塞区间办理功能;采用光纤通信替代以电平信号传输的站间闭塞信息,并通过RSSP-Ⅰ铁路信号安全通信协议保证站间交互数据的安全传输;系统具备维护机功能,可有效缩短故障延时。该系统已通过各项安全性检测,并在实际站场应用,具有良好的稳定性和可维护性。

Aiming at the problems of aging transmission cable and poor maintainability in the existing relay semi-automatic block system,a technical upgrading scheme of computerized semiautomatic block system is proposed.The system adopts a double 2-vote-2 vital computer platform architecture to realize the active-standby switching.The secure computer technology is used to replace the existing relay circuit to realize the block section handling function.The optical fiber communication is used to replace the inter-station block information transmitted by the level signal,and the RSSP-Ⅰrailway signal safety communication protocol is used to ensure the safe transmission of inter-station exchange data.The system also has the function of maintenance machine,which can effectively shorten the fault delay.The system has passed various safety tests and has been applied in actual stations,with good stability and maintainability.