实时风扇散热系统设计.doc

JIU JIANG UNIVERSITY
毕 业 论 文（设 计）
题 目 实时电扇散热系统设计
英文题目 Design of real-time fan cooling system
院 系 电子工程学院
专 业 电子信息工程
姓 名 杨 永 强
年 级 二零零八 级
指引教师 查 兵
二零一二年五月
摘 要
温控电扇在当代社会中生产以及人们寻常生活中均有广泛应用，如工业生产中大型机械散热系统中电扇、当前笔记本电脑上广泛应用智能CPU电扇等。本文设计了基于单片机温控电扇系统，采用单片机作为控制器，运用温度传感器DS18B20作为温度采集元件，并依照采集到温度，通过二个三极管构成达林顿管驱动电扇电机。依照检测到温度与系统设定温度比较实现电扇电机自动启动和停止，并能根温度变化分自动和手动变化电扇电机转速，同步用LCD1602显示检测到温度与电扇转速。LCD1602第一行实现了环境温度显示。LCD1602第二行自动控制时能依照按键调节显示所需要温度初始值和电扇转速；手动控制时，显示转速级别和自动调节转速，两者形成对比，让顾客更明智地切换为自动控制还是手动控制。
核心词：单片机；自动；手动；温控；电扇
T
he Format Criterion of Master’s Degree Paper of DUT
Abstract
Fan in modern society production and people's daily life have a wide range of applications，such as industrial production in large mechanical cooling system of fan，now a laptop on a wide range of applications in intelligent CPU fan. This paper introduces the design of MCU based temperature control fan system，by using a single chip microcomputer as controller，use of temperature sensor DS18B20 as a temperature acquisition component，and according to the collected temperature，through the two three transistor composed of Darlington tube driving fan motor. According to the detected temperature and a set temperature comparison of implementation system of fan motor for automatic start and stop，and root temperature changes automatically or manually changing the fan motor speed，at the same time using LCD1602 to display the detected temperature and fan speed. LCD1602 the first line to achieve environmental temperature display. LCD1602 second line automatic control according to the button to adjust the display to the desired temperature the initial value and the fan speed；the manual control，display speed level and automatic adjustment of the speed，both contrast，allows users to more judicious switch for automatic or manual control.
Key words：si