基于新型485总线的分布式数据采集控制系统  

Distributed Data Acquission and Control System Based on A New Kind RS485 BUS

作　　者：宋晓伟[1] 解大[1] 舒晓琼 戴维 庄骏鹏 何伟 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海飞平电子,上海201109

出　　处：《机电一体化》2008年第10期67-71,共5页Mechatronics

摘　　要：对工业现场常用的RS485总线进行改造,设计了一种基于新型RS485总线的数据采集控制系统。该系统包含终端数据采集模块以及通信控制模块。控制模块通过共享RAM和非破坏性总线仲裁技术,使传统RS485总线具有多主结构,传输速度和稳定性大大提高,并在实际中得到运用。该技术不需要专用芯片,造价大大降低。In this thesis, a scheme of data acquisition and control system based on a new kind RS485 bus ,which improved traditional field bus is proposed. The system includes data acquisition block and communication block. In the design of communication block, the traditional RS485 is updated through the technology of RAM-share and CSMA/CD, and it is with the multi-master mode. Its speed and reliability of transmission is largely improved. The technology has been applied in some projects, and its cost is lower , because of no special chip.

关 键 词：RS485 内存共享 多主结构 总线竞争 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]