| Along with the rapid development of urban and the quick increament of population, the traffic problem in the big city is more and more serious. The mass transit system with metro or light rail as the respesented have the feature of large transportation, fast, safety, on time, energy-save, comfortablity and low pollution, and take more and more important role in the big city. But the research of the core technology and engineering of signaling system for mass transit project is urgent to be resolved in the fields of transportation. Computer interlocking system was an importand subsystem of mass transit signaling system, which was responsible for the safety of train proceeding by the indication of signal.Due to the requirement of mass transit signaling system, base on the fail-safety rule, this paper describe the overall structure of interlocking system, hardware system and software module, and defined the data exchange for automatic train supervisor subsystem and automatic train protection subsystem. Meanwhile, according to the different control object of interlocking system, the signal control module, point control module and general digital input/output module was designed. Due to the technical requirement of the interface of platform screen door, emergency pluger and floodgate, the interface function was defined and the interface circuit diagram was engineeringed. Finally, the reliability, availblity, maintainability and safety (RAMS) of interlocking system were anlaysed by the failure tree method.The research of this paper make the contribution for sloving the key technology of computer interlocking sytem, and it improvess the research level of signaling system.to some extent. |
