CAN总线应用匹配设计  

Matching Design in CAN BUS Application

作　　者：付强[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《计算机与网络》2011年第7期38-41,共4页Computer & Network

摘　　要：控制器局域网(CAN)总线是一种应用广泛的串行现场总线,它支持多主系统,具有较强的抗干扰能力和实时性。介绍了CAN总线应用的通用网络拓扑结构一总线型拓扑结构,提出了应用中要进行匹配设计的方法,即总线终端电阻匹配,分支节点个数、电阻与总线长度匹配,位速率、总线长度与电缆特性匹配,支线长度与布线间距匹配,总线收发器选择和软件匹配等设计方法,达到提高CAN总线传输效率、提高抗干扰性的目的。Controller Area Network （CAN）is a kind of serial bus with widely applications. It supports multi-master systems and has strong anti-jamming and real-time capability. This paper introduces the general hardware and software structures in system applications. Some noticeable matching methods in CAN bus application are brought forward, such as terminal matching resistances, distance and interval between ECUs in, the trunk, selection of trunk length and cable length, relationship between bit rate and length of bus cable, using signal source coding and improving the transmission speciality. All of above improve the efficiency and anti-jamming capacity of CAN systems.

关 键 词：CAN ISO/OSI 电阻匹配电子控制单元 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]