温控风扇.doc

I 基于 STC89C52 的智能温控风扇设计摘要智能温控风扇是一种基于 STC89C52 单片机的系统, 该控制系统通过温度传感器 DS18B20 检测环境温度,单片机将温度模拟量的变化以数字量的形式输出,通过 3个继电器控制电风扇实现不同的转速。风扇转速大小通过变压控制,实现了“温度高,风力大,温度低,风力弱”的性能。关键字: STC89C52 ;智能温控风扇; DS18B20 II Intelligent Electric Fan Control System Design Based on STC89C52 Single-chip Abstract Intelligent electric fan isa systerm that based on STC89C52 Single- systerm can test environment temperature through the temperature sensor chip puter transforms temperature simulation quantity into the form of digital output and realizes different speed of electric fan through the three relay control. Size of electric fan speed is controlled by variable system has realized the performance —“ high temperature, strong wind;low temperature,weak wind ”. Key Words : STC89C52;intelligent electric fan;DS18B20 目录 1绪论................................................................................................................................................. 1 系统概述......................................................................................................................................... 2 STC89C52 单片机简介....................................................................................................... 2 本课题完成的主要内容................................................................................................... 2 2 方案论证.............................................................................................................................................. 6 温度传感器的选用................................................................................................................... 6 控制核心的选择......................................................................................................................... 7 显示电路......................................................................................................................................... 7 调速方式.......................................................