外文翻译--PLC在加热炉温控制系统中的应用（适用于毕业论文外文翻译+中英文对照）.doc

电子与信息工程学院
本科毕业论文(设计)
开题报告
论文题目:PLC在加热炉温控制系统中的应用
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2012年 11 月
外文翻译
译文:
PLC Temperature Control of an Electric Heating Furnace
Abstract:This paper introduces a temperature control system for fin electric heating fumace based on the PLC technology and the electronic rectifier hardware and software of the system are also outlined.
Keyword:programmable logic controller;heating furnace;PID
1 Introduction
Hot stove using simple bit type constant temperature control method, temperature control precision is not high, the temperature control is of unidirectional rising, large inertia, large time delay, time-varying characteristics, and the heating, thermal insulation is dependent on the resistance wire heating, cooling, rely on the natural environment for cooling or add furnace material, once the overshoot is difficult to use control means to bring the temperature. According to mathematical model of controlled object is difficult to determine precisely the characteristics, the system consists of PLC as the core controller, according to the temperature change of the PID controller, the collection of temperature data, and then through the PLC output control, regulating thyristor conduction, to achieve accurate control of temperature. In this paper, the control object monly used in the metallurgical industry in HX1 type electric heat