光纤CAN网络节点数计算方法

光纤CAN网络节点数计算方法 The Calculation Method of Fiber-CAN Bus Network Node Number 吴友宇 WU You-yu 1 2 first-author 杨菊芳 YANG Ju-fang 1 2 梁红 LIANG Hong 1 2 秦神祖 QIN Shen-zu 1 2 武汉理工大学信息工程学院 武汉理工大学信息工程学院 School of Information Engineering, Wuhan University of Technology School of Information Engineering, Wuhan University of Technology 武汉理工大学信息工程学院,湖北,武汉,430070 武汉理工大学信息工程学院,湖北,武汉,430070 为电动汽车通信网设计了一种中继型节点的光纤CAN（Fibre CAN）环型总线网络.采用塑料光纤（POF）作为传输介质,用波长为660nm的红光光电收发器件实现光电转换.在对中继型节点的传输延迟进行详细的分析后,结合CAN协议定义的位周期,给出了基于传输延时的网络最大节点数的计算方法.并对该方法进行了实验验证,实验结果与理论计算具有良好的一致性,表明该方法的有效性. The Controller Area Network （CAN） bus is implemented for a wide range application in industrial field, and it is one of field buses that have broad prospects, because it has advanced features. Optical-fiber is focused the attention of people’s in many fields, because of excellent feature in anti-electromagnetic interference and smaller attenuation. For the EV（electric vehicle） communication network, a new Fiber-CAN network （the transmission medium is optical fiber） is given with loop topological construction. The plastic optical fiber （POF） is used as the communication medium of CAN bus. For this CAN bus network, the wavelength of the light-emitting diode and PIN photoelectric is 650nm. The designed of Fiber-CAN Bus Network is based on regenerating nodes. After analyzing the propagation time of nodes and the bit period of CAN protocol defined, the calculation method of network node number is put forward, and the node number is related well with the propagation time and the bit period of CAN bus. It is proved that the result of experiment is good consistent with the calculation. It is showed that the calculation method is effective. 光纤CAN网 塑料光纤 传输延迟时间 中继型节点 节点数 Fibre-CAN（controller area network） plastic optical fiber propagation time regenerating node node number TP273 国家863计划资助项目（2001AA501213） 2003-05-01 2021-04-01 5