基于单片机的温控风扇系统 毕业论文.docVIP

摘　　要 温控风扇在现代社会中的生产以及人们的日常生活中都有广泛的应用，如工业生产中大型机械散热系统中的风扇、现在笔记本电脑上的广泛应用的智能CPU风扇等。本文设计了基于单片机的温控风扇系统，采用单片机作为控制器，利用温度传感器DS18B20作为温度采集元件，并根据采集到的温度，通过一个达林顿反向驱动器ULN2803驱动风扇电机。根据检测到的温度与系统设定的温度的比较实现风扇电机的自动启动和停止，并能根温度的变化自动改变风扇电机的转速，同时用LED八段数码管显示检测到的温度与设定的温度。该系统改变了传统的手动控制电风扇的起停，实现了温控电风扇全自动调速控制，较好地把智能控制技术应用到了家用电器控制系统中，用人体周围的环境温度对风扇进行温控。 实践证明该调速器可靠性高、控制准确、节能节电、成本低；利用软件技术实现电风扇风速调级和开停机控制，增强了抗干扰性。该设计具有较高的应用价值，适用于依靠电风扇散热来降温的任一控制系统中。 关键词：单片机、DS18B20、智能、风扇 ABSTRACT Temperature control fan widely used in the modern society of production and Peoples Daily life，Such as industrial production machinery cooling system of medium fan、the intelligence CPU fan is widely used in the Notebook computer etcThis article introduces the design of the temperature control system based on single chip computer fan，Using single chip microcomputer as the controller，Use temperature sensor DS18B20 as temperature gathering components And according to the collected temperature，the fan motor driven by a Darlington Reverse drive ULN2803According to the temperature detected by the temperature and system settings of the realization of the motor starts and stops， And can automatically change the fan motor speed according to temperature changes At the same time，the Eight period of digital tube LED display of the detected temperature and set temperature，The system has changed the traditional manual control from the fan`s stopped，In which intelligent control technology is applied to home appliances control system． Practice prove that the controlling of this electric fan governor is high reliability-stabilit，accurate and energy-saving，low cost；Kind of software technology is used to achieve transfer-level fan speed controlling and open parking controlling，which enhances the anti-interference．This design has higher value ,could be applied in any control system in which electric fan is used to lower the temperature． Key words ：Single-chip microcomputer、DS18B20、Temperature control、fan 目　　录 第一章　　概述 1.1选题背景及意义 1 1.2研究目标和内容