目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc417936212"摘要PAGEREF_Toc417936212\h1HYPERLINK\l"_Toc417936213"第一章绪论PAGEREF_Toc417936213\h2HYPERLINK\l"_Toc417936214"1.1课题研究及应用前景PAGEREF_Toc417936214\h2HYPERLINK\l"_Toc417936215"1.2本设计任务主要要求PAGEREF_Toc417936215\h2HYPERLINK\l"_Toc417936216"第二章方案选择PAGEREF_Toc417936216\h3HYPERLINK\l"_Toc417936217"2.1温度传感器的选择PAGEREF_Toc417936217\h3HYPERLINK\l"_Toc417936218"2.2主控机的选择PAGEREF_Toc417936218\h4HYPERLINK\l"_Toc417936219"2.3显示电路PAGEREF_Toc417936219\h5HYPERLINK\l"_Toc417936220"2.4调速方式PAGEREF_Toc417936220\h5HYPERLINK\l"_Toc417936221"第三章系统硬件设计PAGEREF_Toc417936221\h7HYPERLINK\l"_Toc417936222"3.1系统总体设计PAGEREF_Toc417936222\h7HYPERLINK\l"_Toc417936223"3.2主控芯片介绍PAGEREF_Toc417936223\h7HYPERLINK\l"_Toc417936224"3.2.1AT89C51简介PAGEREF_Toc417936224\h7HYPERLINK\l"_Toc417936225"3.2.2AT89C51主要功能和系统参数PAGEREF_Toc417936225\h8HYPERLINK\l"_Toc417936226"3.2.3AT89C51单片机引脚说明PAGEREF_Toc417936226\h9HYPERLINK\l"_Toc417936227"3.2.4AT89C51单片机最小系统PAGEREF_Toc417936227\h11HYPERLINK\l"_Toc417936228"3.3DS18B20温度采集电路PAGEREF_Toc417936228\h13HYPERLINK\l"_Toc417936229"3.3.1DS18B20温度处理方法PAGEREF_Toc417936229\h13HYPERLINK\l"_Toc417936230"3.3.2DS18B20工作原理PAGEREF_Toc417936230\h13HYPERLINK\l"_Toc417936231"3.4其他电路PAGEREF_Toc417936231\h14HYPERLINK\l"_Toc417936232"3.4.1数码管驱动显示电路PAGEREF_Toc417936232\h14HYPERLINK\l"_Toc417936233"3.4.2风扇驱动电路PAGEREF_Toc417936233\h15HYPERLINK\l"_Toc417936234"3.4.3按键模块PAGEREF_Toc417936234\h15HYPERLINK\l"_Toc417936235"第四章系统软件设计PAGEREF_Toc417936235\h17HYPERLINK\l"_Toc417936236"4.1主程序流程图PAGEREF_Toc417936236\h17HYPERLINK\l"_Toc417936237"4.2DS18B20子程序流程图PAGEREF_Toc417936237\h18HYPERLINK\l"_Toc417936238"4.3数码管显示子程序流程图PAGEREF_Toc417936238\h19HYPERLINK\l"_Toc417936239"4.4按键子程序流程图PAGEREF_Toc417936239\h19HYPERLINK\l"_Toc417936240"第五章系统调试PAGEREF_