计轴设备与区域控制中心直接接口方案设计

Design of Direct Interface between Axle Counter Equipment and Zone Controller

列车占用检测设备(通常为计轴设备)是基于通信的列车控制(CBTC)系统的重要组成部分,其信息时延是区域控制中心的重要参数之一。随着全电子联锁系统的发展和应用,城市轨道交通计轴设备与联锁系统的接口方式也由继电接口方式变为通信接口方式,这一变化增加了计轴设备和区域控制中心的信息时延,并影响了区域控制中心的功能设计和工程设计。根据计轴信息数据流,分析计轴设备至区域控制中心的信息时延组成,并估计采用不同接口方式的计轴信息时延,找出影响计轴信息时延的关键环节,提出计轴设备与区域控制中心直接接口技术方案,最后对该方案进行时延分析并进行计算机模拟仿真。仿真结果表明,该方案可将区域控制中心与计轴设备之间的信息时延减小至1.0~2.4 s,为进一步优化区域控制中心的功能设计和工程设计提供了依据。

Train occupancy detection equipment(usually as Axle Counting Equipment)is an important part of communication-based train control(CBTC)system,and its message latency is one of the most important parameters of Zone Controller.With the development and application of the full-electronic interlocking,the interface between Axle Counting Equipment and interlocking system of urban rail transit has changed from relay method to communication method.This change increases the message latency between Axle Counting Equipment and Zone Controller,and influences the functional and engineering design of Zone Controller.Following the data flow of Axle Counting Equipment,this paper analyzes the composition of the message latency from Axle Counting Equipment to Zone Controller,estimates the message latency with different interface methods,finds out the key process that affects the message latency of Axle Counting Equipment,proposes a technical scheme of direct interface between Axle Counting Equipment and Zone Controller.In the proposed scheme,the message latency is analyzed and simulated by computer.The simulation result shows that the message latency between Axle Counting optimizing the functional design and engineering design of Zone Controller.