中文摘要：

以单片机89C52作为主控制器,采用温度传感器DS18B20检测环境温度,利用数码管显示所测温度值,不但可以根据风扇挡选择风速大小,而且重点将PID控制调速技术应用到智能风扇中,从而实现更加精确且快速地调节风扇转速。

英文摘要：

This system uses single chip microcomputer 89C52 as the main controller,and through the temperature sensor DS18B20 detecting environment temperature,and displays the measured temperature by digital tube. Such not only can choose speed according to fan gear, but also PID speed control technology is applied to intelligent fan,so as to realize more accurate and fast adjustment of the fan speed.