强电磁干扰环境下测控系统的通信系统设计

Communication System of Measure-control System in Heavy EMI Surrounding

介绍了在强电磁干扰环境下工作的测控系统的串行通信子系统的硬、软件设计。整个系统分两级网络 ,均为RS - 4 85 /光纤混合 ,由一级网通过RS - 2 32接口与上位机相连。并分别给出了接口电路和相应程序流程。

This paper introduces the design of serial communications subsystem in a measure-control system which is operated in surrounding with strong electro magnetic interference(EMI). The subsystem consists of two level networks, both of the two levels are composed of RS-485 and optical fibers. And then the system communicates with PC through RS-232 interface. The circuits of the interfaces and flow-chat of the program are presented in the article.