摘 要电风扇是夏天给人们降温的非常好的家用电器,智能风扇就是能根据温度的改变,风扇转速随之改变,现在的风扇很难做到这一点,只有人为的几档调速。夏夜温度下降后人们容易因熟睡而受凉,当温度升高时,它又不能根据温度的变化改变转速。本设计智能风扇采纳单片机 AT89C51 作为控制系统的核心,使用温度传感器 DS18B20 进行当前的温度采集,利用 PWM 脉冲宽 23 度调制技术进行实时调速,并通过 LED 数码管显示当前温度。关键词:单片机;温度传感器;风扇; PWM;Design of Smart Fan Based on Single Chip MicrocomputerAbstractFan is very good for people cooling appliances in the summer. Smart Fan is according to changes in temperature, and fan speed changes. Now the fan is difficult to do this, only a few artificial stall speed. The design of the fan control system uses AT89C51 microcontroller , the indoor temperature sensor DS18B20 temperature acquisition, use PWM pulse width modulation technology for real-time control, and displays the current temperature through the LED digital tube. Key Words: Microcontroller;Temperature Sensors;Fan;第一章 绪 论....................................................................................................................................31.1 引言....................................................................................................................................31.2 进展现状与应用领域........................................................................................................31.3 本次设计的主要任务和内容.............................................................................................4第二章 方案论证.............................................................................................................................52.1 控制核心的选择................................................................................................................52.2 调速方式的选择......................................................