联合收获机CAN总线架构设计与试验

针对国内外农机装备智能化发展及设备物联远程网控需求,基于ISO 11783系列标准,提出并设计了联合收获机智能CAN总线方案及其应用系统。根据联合收获机的作业特点和智能控制需求,建立了由动力CAN总线、设备管理CAN总线、专用设备CAN总线1和专用设备CAN总线2组成的模块化、可扩展的智能农机CAN总线网络结构。基于ISO 11783 CAN总线应用层协议标准,制定了智能化联合收获机远程网控通信协议。最后,进行了联合收获机CAN总线应用系统网络负载和实时性的通信试验及工程应用试验验证。试验结果表明,在500 kb/s波特率下,所有总线的负载率均小于30%,数据在3层CAN总线之间传输总延时小于1 ms,满足联合收获机智能远程网控CAN总线系统的设计要求。

CAN Bus Architecture Design and Test of Combine Harvester

Aiming at the intelligent development of agricultural machinery and equipment at home and abroad and the remote network control requirements of equipment and materials, based on ISO 11783 agricultural machine CAN bus standard, the intelligent harvesting CAN bus program and its application system were proposed and designed. According to the operation characteristics and intelligent control requirements of the combine harvester, a modular and expandable intelligent agricultural CAN bus network structure, consisting of a power CAN bus, a device management CAN bus, a dedicated device CAN bus 1 and a dedicated device CAN bus 2 was established. Based on the ISO 11783 CAN bus application layer protocol standard, an intelligent remote harvester remote network control communication protocol was developed. Finally, the network load and real-time communication experiment of CAN bus application system of intelligent combine harvester and the engineering application experiment were carried out. The results showed that at the baud rate of 500kb/s, the load of all buses was less than 30%, and the data transmission delay between the three layers CAN buses was less than 1ms, which fully met the design requirements of the intelligent remote network-controlled CAN bus system of combine harvester. In engineering applications, it also met the automatic navigation communication requirements of harvesters.