目录综述······································································11方案分析与设计······················································21.1PID闭环温度控制电路··········································21.2以滞回比较器为核心元件的温度控制器·······················22电路设计框图及功能描述···········································32.1测量放大电路····················································42.2控制电路··························································82.3驱动电路··························································92.4加热模块··························································103电路原理设计及参数计算···········································114仿真运行······························································135课程设计体会························································15参考文献································································16摘要为了提高温度控制的精度，使控制更加方便简洁，设计出性能更好更优越的闭环温度控制器。本设计采用灯泡模拟加热系统，利用含有热敏电阻的电桥电路实现温度传感，由放大电路和滞回比较器的组合，控制加热系统的加热与否。令系统在温度T1以下灯泡自动点亮（加热），温度上升到T2时灯泡自动熄灭（停止加热），如此将温度控制在T1到T2范围内。利用此电路，可根据灯泡的亮与灭判断系统是否进行加热，方法简单易行。关键词：闭环温度控制器；灯泡；热敏电阻；桥式电路；滞回比较器