铁路信号区间分布式轨旁通信单元的研究与设计

Research and Design on Distributed Track-side Communication Unit of Railway Signal Section

区间分布式轨旁信号控制系统是实现对区间信号设备的轨旁闭环控制,实时监控现场信号设备.通过研究分布式轨旁信号控制系统,提出了系统中的分布式控制架构,重点进行了轨旁通信单元的硬件和软件设计,实现系统控制主机与室外分布的轨旁执行单元的安全通信.为保证信息传输的可靠性和安全性,进一步研究设计了冗余网络结构和安全通信协议,完成了验证测试,实现了区间轨旁信号设备的分布式通信.

The structure of railway section distributed track-side signal control system is similar to the all-electronic computer interlocking system.The system consists of monitoring layer,logic control layer,track-side execution units,field devices layer and track-side safety communication network.Monitoring layer achieves human-computer interaction.Logic control layer achieves a variety of control logic operation.Track-side execution units achieve control and state acquisition of field signal devices.Track-side communication unit is the core of this system.Its main function is sending control commands issued by the control panel and uploading status information of field signal devices to achieve decentralized control and monitoring of signal devices.And it ensures the reliability and safety of information transmission.In this paper,the communication interface conversion module of track-side communication unit is designed and a high reliability bicyclic redundant fiber-optic communications network is set up.The communication network is tested,the safety of this network structure is analyzed and the distributed control to the field devices is achieved.