论文部分内容阅读
将CAN现场总线技术应用于工程机械分布式控制系统中,提出了该分布式控制系统的结构模型,在此基础上,详细介绍了人机界面节点、主操作台节点及其它子节点的具体功能及结构特点;为简化系统硬件设计及提高系统抗干扰性能,采用TI公司高性能的16位DSPTMS320LF2407作为核心器件来实现工程机械分布式控制系统的设计,利用TMS320LF2407芯片内置的CAN控制器来构成CAN总线网络;完成了系统各个节点的硬件设计,并在硬件上采用光电隔离的方法,以防止从CAN总线上窜入的干扰信号;完成了各节点的软件设计,并在软件上采用定时测试的方法来保证通信过程中数据传输可靠。通过模拟试验对各节点间通信的稳定与可靠性进行了检验。试验结果表明:该分布式控制系统软件及硬件稳定可靠,主节点能够与子节点间进行可靠的数据传输与通信,实现了在线远程监控。
The CAN field bus technology is applied to the distributed control system of construction machinery, and the structural model of the distributed control system is proposed. Based on this, the detailed functions of human-machine interface nodes, main console nodes and other subnodes are introduced In order to simplify the system hardware design and improve the anti-jamming performance of the system, TI’s high-performance 16-bit DSPTMS320LF2407 is used as the core device to realize the design of the distributed control system of construction machinery. The built-in CAN controller of TMS320LF2407 chip is used to form the CAN Bus network; completed the hardware design of each node of the system, and in the hardware using optical isolation method to prevent the interference signal fleeing from the CAN bus; completed the software design of each node, and in the software using regular testing Method to ensure reliable data transmission during communication. The stability and reliability of communication between nodes were tested by simulation. The test results show that the distributed control system software and hardware are stable and reliable, the master node can carry out reliable data transmission and communication with child nodes, and realize online remote monitoring.