MNet-DACS:多级网络数据采集与控制系统

Carlos Serôdio, J. B. Cunha, M. Cordeiro, A. Valente, R. Morais, P. Salgado, C. Couto
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引用次数: 6

摘要

本文介绍了一种基于英特尔80C592单片机的分布式数据采集网络的实现。每个站点以分层方式连接,形成树形拓扑结构。下层网站由从站指定,专门用于数据采集和控制信号的产生。上层,master,负责通信控制。两个网络都使用CAN(控制器局域网)总线,用于数据传输,全球网络也通过CAN连接到PC机。实现了一个设备路由器NetManager,以支持通信级别的全部内在需求。这种类型的连接允许从个人计算机(PC)进行总体配置,PC运行为Windows(TM)环境开发的软件应用程序。在实验室进行的传输速率从40千比特/秒到1兆比特/秒不等的测试表明,分别在1100米至40米的电缆长度上进行通信没有错误。该系统目前正在葡萄牙一所大学校园的一套环境室和温室中安装,在那里它将监测和控制空气温度和湿度、CO/sub 2/和氨浓度以及辐射水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
MNet-DACS: multi-level network data acquisition and control system
This paper describes the implementation of a distributed data acquisition network based on the 80C592 microcontroller from Intel. Each station is connected in an hierarchical way to form a tree topology. The lower level network stations, designated by slaves, are dedicate to the data acquisition and the generation of control signals. The upper level, masters, are responsible for the communications control. Both networks use a CAN (controller area network) bus, for data transfer, and the global network is also connected to a PC, via a CAN. A device router, NetManager, was implemented to support total intrinsic requirements at the communication level. This type of connection allows total configuration from a personal computer, PC, which runs a software application developed for Windows(TM) environments. The tests performed at the laboratory, with transmission rates varying from 40 kbits/s to 1 Mbits/s, showed that the communications were performed without errors for cable lengths of 1100 m to 40 m, respectively. This system is now being installed in a set of environmental chambers and greenhouses located on a Portuguese university campus, where it will monitor and control air temperatures and humidities, CO/sub 2/ and ammonia concentrations and the radiation level.
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