城市轨道交通信号系统倒切电路设计

Design of Quick Switch Circuit of Signal System Used in Urban Rail Transit

在城市轨道交通信号系统改造调试期间,对新设信号系统的调试不能影响既有信号系统的正常运行。通过对城市轨道交通运营需求的分析,将新设信号系统放在非运营时段进行调试。在运营时段和非运营时段,分别由既有信号系统和新设信号系统控制室外设备。针对调试期间,两套系统分时复用共用室外设备的问题,设计了一种分时控制的倒切电路,并给出了倒切电路的工作流程。倒切电路具有两种控制权限,由转极电路、倒切电路、表示电路组成。该倒切电路具有倒切快速、操作方便、显示清晰、安全可靠等优点。

During the period of transformation and commissioning of the signal system of urban rail transit, the debugging of the new signal system should not affect the normal operation of the existing signal system. For this reason, by analysis on operational requirement of urban rail transit, the new signal system should be debugged during non-operating period. The existing signal system controls the outdoor equipments during operation period, while the new signal system controls the outdoor equipments during non-operation period. In order that the two systems could share the same outdoor equipment with the time division multiplex technology during the period of commissioning, a kind of quick switch circuit based on time-sharing control technology was designed, and the workflow of the quick switch circuit was given in this paper. The whole quick switch circuit has two kinds of control permissions, being made up of pole-turn circuit, switch circuit and indication circuit. Especially, this quick switch circuit has advantages of fast switching, convenient operating, clear displaying, higher safety and reliability and so on.