A Safety Framework and Alarming Model for Train Operation Environment Based on CPS

In recent years, with the development of high speed railway, the speed and capability of the train constantly improve, and traffic density gets more and more serious. As a result the requirement to the reliability and safety of the high speed train operation enhances increasingly. However, safety of high speed railway extremely relies on its surrounding environment. This paper discusses the key technical problems about ensuring the safe operation of the high-speed train, and puts forward a high-speed railway safety framework based on CPS (Cyber Physical Systems). It uses the thought of wireless sensor network to design the high-speed railway infrastructure, in order to timely collect, transfer, analyze and process the surrounding environment information. Further, this paper discusses the system network structure, heterogeneous network access technology, key technology of heterogeneous information fusion as well as network fault-tolerant technology for the high-speed train safety monitoring system. The aim is to forecast before a disaster or accurate alarm after a disaster, by which to avoid or reduce the danger, and make the train operation keep fail-safe.