单片机的智能温风扇的设计5.doc

题目： STC89C52电风扇智能调速器的设计 摘 要 从一百多年前开始，越来越多的发明开始融入人们的生活。风扇这一项发明，想必没有人会不知道。在学名上风扇指的就是在热天借以生风取凉的用具电扇，是通过电驱动产生气流的一种装置，内配置的扇子通电后来进行转动化成自然风来达到乘凉的效果（这应该就是是大众对风扇的基本认知）。作为在炎炎夏日里解暑必备的电器之一，风扇应该是家家户户必备的电器。作为取代人力扇扇子的重要发明，风扇在这些年来一直在技术上有革新。从1830年开始第一台风扇的问世，到现在历经的一百八十多年，风扇从最初的的固定在天花板上用发条来驱动的机械风扇，到如今的落地扇、台式、壁扇、换气扇、转页扇等许多种，风扇的种类和功能变得越来越多，能满足更多人对于风扇的需求。 而本次设计呢，是一种温控风扇系统，该系统具有灵敏的温度感测和显示功能，系统STC89C52单片机作为控制平台对风扇转速进行控制。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。所设高低温值保存在温度传感器DS18B20内部E2ROM中，掉电后仍然能保存上次设定值，性能稳定,控制准确。 关键词：单片机；温度传感器；智能控制。 ABSTRACT Since more than one hundred years ago, begin to embody the life of people more and more inventions. Fan this invention, surely no one will dont know. Fan on the scientific name is born on a hot day to take the cold wind appliance electric fan, is generated by electric currents, a device configuration in fan electricity later turn into natural wind to reach the effect of shade that is, should is the basic cognition on popular fan . As a good one of the necessary appliances in sorching summer, fan should is indispensable for every household electrical appliances. As an important invention replace human fan, fan over the years has been on the technology innovation. The first fan since 1830, after more than one hundred and eighty years up to now, fixed on the ceiling fan from the initial mechanical fan, driven by the wind to the todays floor fan, desktop, wall fan, exhaust fan, fan and so on many kinds of pages, types and function of the fan is becoming more and more, can meet more people in. And for the design, is a kind of temperature control fan system, this system has the sensitive temperature sensor and display function, system STC89C52 single-chip microcomputer as the control platform to control the fan speed. High and low temperature can be set by the user, the measured temperature value between high and low temperature when open the fan weak wind, when the temperature exceeds the set temperatur