关于工业控制器设计研究毕业论文.doc

关于工业控制器设计研究毕业论文 附录C...................................................................................................................................................................................43 附录D...................................................................................................................................................................................45 插图清单 图2.1 硬件总体结构框图....................................................................................................................................7 图2.2 AT89C52单片机DIP封装的引脚....................................................................................................9 图2.3 复位电路和时钟电路...............................................................................................................................9 图2.4 铂电阻温度传感器采样电路.............................................................................................................10 图2.5 AD7705引脚图...............................................................................................................................................13 图2.6 A/D转换电路................................................................................................................................................14 图2.7 相位控制调功电压波形........................................................................................................................14 图2.8 通断控制调功电压波形........................................................................................................................15 图2.9 交流SSR工作原理框图........................................................................................................................16 图2.10 可控硅输出电路......................................................................................................................................17 图2.11 键盘电路.......................................................................................................................................................18 图2.12 显示电路......