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The Design of Embedded MCU Network Measure and
Control System
GAO Guanwang, WANG Yanpeng, SHA Zhanyou
College of Information Science and Engineering,Hebei University of Science and Technology, ,Shijiazhuang Hebei, China
Abstract
This paper introduces a type of embedded MCU network measure and control system based on Ethernet, which adopts high speed MCU with kernel of 8052. Through controlling the special chip for Ethernet, the system realized the function of TCP/IP protocol. Since the system can be used as a independent system, any computer on the net can control the system or transmit order and data to the system through standard TCP/IP protocol. Equipped the system by digital temperature sensor, it can be used to measure industry field temperature and transmit the results to computer through network, and then get temperature curve. And its measure and control range are all -10~125℃,the accuracy is℃, the resolution reaches 0.1℃. This system have many advantages such as simple structure,better universal, communicating through network, flexible usage, low cost etc. It can be adapted by various of intelligent sensor and has better extend ability. It can be used in the fields of remote data acquisition, remote measurement and control and so on.
Keywords: Embedded MCU Network Measure and Control System; Ethernet; System parameter; Digital Temperature Sensor.
1.Introduction
The development history of the measure and control system experienced six phases in the following. (1)The traditional control system consists of MCU, PC or IPC. (2) The measurement and control system based on PC bus. (3) Distributed Control System (DCS). (4) DCS system based on LAN. (5) HART bus which is developed by the 2-wire 4mA ~ 20mA standard signal, and is a kind of fieldbus used between the intelligent field equipment and automatic control equipment. (6) Since 90s of the 20th century, with the rapid development of the Internet, it becomes possible that more quickly, more convenient and more ec
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