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

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　ｔｅｃｈｎｏｌｏｇｙ．ｙ．Ｔｈｅ　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 is commonly used in the metallurgical industry in HX1 type electric heating furnace, furnace temperature for 20-600° 2 System structure . The hardware device is mainly composed of PC, programmable controller, temperature sensor, temperature transmitter, solid state relays and electric heating furnace. As shown in figure 1. Fig 1 the block diagram of the control system of heating furnace The control system of control information and data information in the computer centralized management, allocation, make the system more simple, effective, the user can browse, printing various field data, statements, and also to control the spot operation control. The temperature control system of single loop control system, by the Mitsubishi Co Fx2N series PLC as the