Research on CAN Bus Fail-Safe Communication of Computer-Based Interlocking System

Based on the application of CAN bus technology in the computer-based interlocking system,this paper researches how to realize fail-safe communication.This paper analyzes the safety requirements of the communication network that the computer-interlocking system need,educes that the sufficient and necessary condition of fail-safe communication is transmission link survivability,information transmission integrity,real-time,testability.and gives a solution,which adopts system fault tolerance,packets error control codes,to realize CAN bus fail-safe communication,The results from function testing and theoretics calculation show that the design corresponds to fail-safe principle,the safety of systemin reaching the computer-based interlocking system requirements.