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本文介绍了中频电加热炉温控系统。由８０３１ 单片机控制晶闸管触发角。利用温敏二极管的线性负温度特性对热电偶进行冷端补偿，补偿精度优于１℃。控制算法采用模糊ＰＩ复合控制。具有成本低，对参数变化不敏感，控制效果好等特点。
This article describes the frequency electric heating furnace temperature control system. By the 8031 microcontroller trigger thyristor trigger angle. Thermocouple cold junction compensation using linear negative temperature characteristics of the temperature-sensitive diode, the compensation accuracy better than 1 ℃. Control algorithm using fuzzy PI composite control. With low cost, the parameters are not sensitive to changes, the control effect is good and so on.