现有设备Internet联网控制的研究

Research of Controlling the Existing Equipment by Internet

为提高设备群的整体效率,需要将个体设备联网控制,但因现有智能设备的RS232通讯接口受到很大的限制。本设计采用单片机和网卡控制芯片为主的电路,进行协议的转换,将原接口变换成RJ45接口,使其具有独立的IP地址,便于IE直接访问,方便地实现了远程监控和管理。本文主要阐述如何针对RS232的特点,通过W78E51单片机控制以太网控制器RTL8019A,最后实现协议转换的关键技术。

To improve the integrated effi ciency of device group, the individual device should be controlled through internet. But it has been greatly limited by RS232 communication interface. Aiming at this problem, a circuit that is mainly composed of SCM and network control chip is proposed in this paper. The combination of protocol conversion and RJ45 interface took the place of RS232 interface, the individual device was interviewed easily through IE with a self-existent IP address, which makes the realization of remote monitoring and management of existing equipments convenient. In the following statement, we would expatiate on how to aim at the characters of RS23 through W78E51 MCU and RTL8019A and realize the key technology of protocol conversion.