Design and Implementation of the Networked measurement and Control System based on the Internet

Abstract

Distributed and networked measurement and control system has become a trend. In this paper, we designed and implemented an Internet-based networked measurement and control system. High-speed Ethernet plays the role of the field measurement and control subsystem. In this subsystem, we use the gateway node to manage the data acquisition and control units and through it to communicate with the Server on the Internet. The Internet Server, by providing the web service interface, can communicate with the third-party applications. We used C8051F340 as the core to design a control node, which achieved the coordinately call and execution efficiently based on event driven mechanism. In the software design aspect, the gateway node has joined the function of parameters configuration, which reduced the influence on the network bandwidth to the control system and improved the efficiency of measurement and control system. The web server was designed so that the gateway node can maintain the normal operation of the field measurement and control subsystem which only need the Internet server sends the configuration information to the corresponding gateway node. We verified the validity of this system through networked measurement and control of temperature and humidity.