基于CAN的最大总线长度和节点数求解方法

Method of solving the maximal bus length and number of nodes based on CAN

本文以82C250作为CAN控制器与物理层总线之间的接口，通过CAN控制器与总线進行差动地发送与接收，建立CAN总线网络分布等效电路，推导出最大总线长度和节点数，从而为选择CAN总线来组建船舶监控系统提供理论依据，并能迅速发现和排除运行中的故障，增加安全可靠性。

This paper selects 82C250 as the interface between the CAN-bus controller and physical layer, provides differential transmission and reception through CAN-bus controller, and establishes network distribution equivalent circuit based on CAN-bus, and the largest length of bus and the number of nodes can be deduced. Thus, it provides a theoretical basis for vessel monitoring system. It can accurately estimate the length and the maximum number of nodes, and rapidly detect and exclude operational failures, and improve the safety and reliability of the system.