基于51单片机的温控风扇设计.doc

摘要 PAGE IV PAGE I 基于51单片机的温控风扇设计 摘 要 在炎热的夏天人们用电风扇来降温；在工业生产中，大型机械用电风扇来散热等。随着温度控制的技术不断发展，应运而生的温控电风扇也逐渐走进了人们的生活中。温控电风扇可以根据环境温度自动调节电风扇启停与转速，在实际生活的使用中，温控风扇不仅可节省宝贵的电资源，也大大方便了人们的生活和生产。 本设计为一种温控风扇系统，具有灵敏的温度感测和显示功能，系统采用STC89C51 单片机作为控制平台对风扇转速进行控制。利用DS18B20数字温度传感器采集实时温度，经单片机处理后通过三极管驱动直流风扇的电机。根据采集的实时温度，实现了风扇的自起自停。可由用户设置高、低温度值，测得温度值在高低温度之间时打开风扇弱风档，当温度升高超过所设定的温度时自动切换到大风档，当温度小于所设定的温度时自动关闭风扇，控制状态随外界温度而定。 关键词：温控风扇，单片机，DS18B20，自动控制 前言 Temperature control fan?design?based on 51 single chip microcomputer ABSTRACT In the hot summer,?people use?cooling fan;?in the industrial production,?is used toheat?the electric fan?large machinery.?With the continuous development?of thetechnology?of temperature control,?temperature controlled electric fan?emerge as the times require?gradually into?peoples lives.?Temperature controlled electric fan?can be adjusted automatically?stop?and?start?the fan?speed?according to the environment temperature,?the?use?of real life,?temperature controlled fan?not only can save?power resources?valuable,?but also greatly facilitate the?peoples life and production. The design of?a temperature controlled fan?system,?sensitive?temperate- easuing?and display,?the system?uses STC89C51 microcontroller as the control?platform?to control?the speed of the fan.?The real-time?temperature?using DS18B20 digital temperature sensor,?SCM processing?through the transistor?DCfan?motor drive.?According to the real-time temperature?acquisition,?the?fan?selfstop.?High,?low?temperature value?set by the user,?the measured?temperaturevalues in the?high and low temperature?between?open fan?weak wind profile,when the temperature?exceeds?the set temperature?automatically switch to?thefile,?automatically?turn off the fan?when the temperature is lower than the?set temperature,?the control?state?varies with the?outside temperature.? KEY WORDS: Temperature control fan,?MCU,?DS18B20,automatic control 目　录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc396941794 HYPERLINK \l _Toc396941795 前　言 PAGERE