单个CAN控制器的双总线冗余网络实现

提出了一种新的双CAN总线冗余网络拓扑,其每个CAN节点只需一个CAN控制器和模拟多路开关,当一条总线上出现短路或断路等故障致使通讯不能正常进行时,系统可自动切换到另一条无故障的总线上继续工作,使总线通讯的可靠性得到大大提高。另外,系统还可对总线上的节点进行周期性的查询,及时发现节点故障。对实验系统的测试结果表明,该系统动作可靠,方案可行,成本低廉,便于实现。

The Implement of Dual CAN-bus Redundancy Network with Single CAN Controller

This paper puts forward a new dual CAN-busredundancy network topology,in which each CAN node needs only one CAN controller and one analog multi-channel switch.When one bus encounters such troubles as short circuit or open circuit that it can not communicate normally,the system can switch automatically to another bus in good condition and go on with work,thus greatly improve the reliability of CAN bus communication.Besides,the system can query the CAN nodes periodically,and find the errors in time.The testing results of the system indicate that it can work reliably and is feasible due to its low cost.