电动公交车CAN总线系统通信节点的设计

Design of CAN-BUS communication node for electric bus

以解决电动公交车各控制器之间的信息交换问题为目标,采用CAN总线技术作为实现的方法,分析了CAN-总线作为主流现场总线的重要作用和技术特点,讨论了CAN-总线应用在电动公交车上的巨大潜力和发展前景.对电动公交车的实际工况要求进行了独特性分析,提出了电动公交车CAN总线通信系统的完整框架.研究了CAN总线的四种主要的拓扑结构,通过分析CAN的协议标准,定义了电动汽车上光纤通信的协议规则,设计了一种适合于电动公交车的CAN总线节点,同时进行了相应的软件设计.实验结果证明,该方案在电动公交车总线控制、信息传输等方面,非常有应用价值.

In order to solve the information exchange problem between various controllers of electric bus, CAN-BUS technology was applied. The importance and characteristics of CAN-BUS as the mainstream field bus were analyzed, and the enorraous potential and development prospect of CAN-BUS in electric bus were discussed. After performing the unique analysis on the actual operating condition requirements of electric bus, the complete frame was proposed for CAN-BUS communications system of electric bus. Through studying the four major topological structures of CAN-BUS and by analyzing the protocol standard of CAN, the agreement rules of optical fiber communication in electric bus were defined and the CAN-BUS node applicable for electric bus was designed. Meanwhile, the corresponding software was programmed. The experimental results prove that this solution has much application value in such aspects as the field bus control and information transmission for electric bus.