Design And Implementation Of A New Type Of Dual-duplex Safety-critical Computer System

With the rapid development of China's urbanization level, The traffic has become an urgent problem put in front of the city managers. The popularity of rail transportation provides a new way to solve the traffic problems brought about by China's urbanization. Therefore, there are a number of manufacturers started to develop the rail traffic signal system with independent intellectual property. As the hardware core of rail traffic signal system, Developing with high reliability and security safety-critical computer has become a top priority. The author describes in detail several kinds of safety-critical computer used widely in the country. The author designs a new type of dual-duplex safety-critical computer system and describes the safety-critical computer system from three parts. In the CPU module, this paper presents a synchronization vote program based on Ethernet communication. In the IO module, The dynamic circuit design can make us achieve safe input and output data. In the switch module, the authors implement seamless switch by loop control. It was shown through functional and performance test that the dual-duplex safety-critical computer system can meet the needs of computer platform with high reliability and security...