信号系统更新改造中的站台门接口方案研究

Platform Screen Door Interface Solutions in Signaling System Upgrading and Renovation

[目的]城市轨道交通信号系统达到寿命周期后,需对老化的信号设备进行更新改造。站台门接口属于信号系统更新改造的重要部分。由于站台门改造与信号系统改造周期不同步,需研究信号系统更新改造中的站台门接口方案,以实现新信号系统与既有站台门的接口功能,且满足信号系统改造过程中不影响既有信号系统与站台门接口功能。[方法]新信号系统对既有站台门接口的适配以及新旧信号系统站台门接口倒接方案均属于信号系统改造过程的重点和难点。基于国内某信号系统更新改造中的站台门接口方案,阐述了信号系统与站台门接口功能;分析了信号系统控制命令分别采用脉冲信号及持续信号方式的接口时序;结合既有站台门接口电路及新信号系统特点,提出了既有站台门接口电路改造方法,可实现新信号系统适配既有站台门接口;设计了站台门接口倒接方案,可实现新、旧信号系统平稳过渡。[结果及结论]所提出的信号系统更新改造中的站台门接口方案,可实现新、旧信号系统与站台门接口的无扰过渡,并可在一定程度上提升站台门接口的可靠性。

[Objective]When urban rail transit signaling systems reach their lifespan end,the aging signaling equipment must be upgrade and renovated.The PSD(platform screen door)interface is a crucial part in signaling system upgrade.Since the renovation cycles of PSD and signaling system are not synchronized,it is essential to develop a PSD interface solution during the signaling system upgrade to ensure compatibility between the new signaling system and the existing PSD,while maintaining the interface functionality between them during the transition process of signaling system upgrade.[Method]The adaptation of the new signaling system to existing PSD interface and the PSD reverse connection scheme between new and old signaling systems are key challenges in the signaling system renovation process.Based on the PSD interface solution of a specific signaling system upgrade project in China,the interface functions between the signaling system and PSD are explained,the interface time sequence of signaling system control commands using pulse and continuous signal methods separately is analyzed.Considering the characteristics of existing PSD interface circuit and new signaling system,a modification method for existing PSD interface circuit renovation is proposed,allowing the new signaling system to be compatible with the existing PSD interface.A reverse connection scheme for PSD interface is also designed to ensure a smooth transition between the new and old signaling systems.[Result&Conclusion]The proposed PSD interface solution in the signaling system upgrade and renovation ensures seamless transitions between the old/new signaling systems and PSD interfaces,while also improving the reliability of the PSD interface to some extent.