一引言近年来,随着电子技术和计算机技术的飞速发展,微处理器和微型计算机已日益广泛地向各个领域普及。在过程控制方面,也已开始应用,这是工业自动化的发展方向。我厂树脂砂轮硬化工艺过程是在室式电阻炉内进行的。过去采用人工调温,工作繁琐,控制精度差,操作容易失误。实际炉温经常过多地偏离预定的工艺曲线,不利于产品质量的 I. INTRODUCTION In recent years, with the rapid development of electronic technology and computer technology, microprocessors and microcomputers have been increasingly popularized in various fields. In process control, has also begun to apply, which is the direction of industrial automation. I plant resin wheel hardening process is carried out in the chamber resistance furnace. In the past using artificial temperature control, tedious work, poor control accuracy, easy to make mistakes. The actual temperature often deviates too much from the intended process curve, which is detrimental to product quality