基于CAN总线的多机表决式故障诊断系统的设计方法

Designing Method of Multi-microcomputer Voting Fault Diagnosing System Based on CAN Bus

多机表决是提高故障诊断系统可靠性的一种有效措施。详细地描述了基于CAN总线的多机表决式故障诊断系统的硬件结构及其软件的设计方法 ,同时也设计了一种利用CAN总线构建双机冗余系统的方法。实际应用表明 ,该系统具有线路简单、工作可靠、扩展灵活、从机节点可以“热插拔”、可方便地根据不同安全等级要求灵活实现不同表决算法等诸多优点。

Multi-computer voting is an effective method to enhance reliability of fault diagnosing system.Hardware and software designing method of Multi-microcomputer voting fault diagnosing system based on CAN bus are described in detail.At the same time,a method of designing Dual-Microcomputer redundancy system based on CAN bus is presented too.According to test on the spot,this system has many advantages,such as simple circuit,flexible extending,high reliability,slave nodes hot plugging support,easy realization of different algorithm,etc.