FPGA Based Research on Safety Information Transmission Mechanism of Rail Transit

摘要

In recent years, with the rapid development of China High-speed Rail and magnetic levitation transportation, the domestic rail transit industry has entered a high-speed, high efficiency, high safety and high reliability stage. Signal safety is the core of safe and reliable operation of rail transit. In order to guarantee the safe and reliable transmission of rail transit signals, China has already had its own proprietary safety information transfer protocol of RSSP-1 and RSSP-2. At the application level of the protocol, however, it can only achieve the communication between the train control center. The application environment of the protocol, which requires the safety computer with high performance, is usually achieved by high-level language. Based on the analysis of the safety information transmission mechanism, it is the first time to propose that using the FPGA to achieve the safety information transmission protocol, which is original and expands the application scenarios of rail traffic safety communication protocol. Due to the erase and reconfiguration ability of FPGAs, the cost of safety information transmission engineering can be reduced to a great extent, and it has a high value on research. In this paper, the design of communication frame protocol is given from two aspects: sender and receiver. Its reliability and function was tested, and the test results showed that the safety information transmission interface based on the FPGA fully meets the design requirements. The system can not only achieve the function of fail-safe but also can meet requirements of reliability on the rail transit system.