摘要本设计是一个单片机人体感应智能风扇系统，它可以灵敏地检测温度并且在数码管上显示出来。用户可以按照自己周围情况和自身需要自行设置最高和最低的温度值，在温度达到最高和最低温度的区间时再按按钮打开风扇的弱风档，而当周边环境温度持续走高并大于用户自己所限定的数值时，会自动跳到大风档，而当外面的温度持续减小并且还比之前使用者限定的值还小时风扇会停下。温度传感器所检测到的温度与风扇息息相关。用户按照自身情况设定的上下限值存在于B20传感器内部，如果是这种情况即使外界停电后风扇脱离电源仍然能够保存上次所设的限定的温度，它能基本上一直呈现出它稳定的状态，并且被它控制的风扇能够精准的运转，误差小。68864

该论文有图14幅，表2个，参考文献15篇。

毕业论文关键词：B20温度传感器  C52单片机  FIR  智能控制

Intelligent Fan Based on  Human Body Induction

Abstract

This intelligent fan system is based on the human body induction. It can test the temperature sensitively and display on the digital tube. The user can set highest and lowest temperature according to their surrounding environment and their own requirement. When the temperature reaches the range of maximum and minimum temperature, the system will press the button to turn on the weak wind. When the temperature of the surrounding environment is higher than the value set up by the user, the system will jump to the wind file automatically. When the temperature keeps decreasing and the value is smaller than the user defined before, the fan will stop. The temperature sensor is closely related to the temperature of the fan. The upper and lower limits which the user sets up according to their own circumstances will exist in the B20 sensor. The system can still save the last set of limited temperature even if the power can’t supply the fan. It can basically have a stable state and the fan is able to operate accurately.

There are 14 figures, 2 tables and 15 references in this paper.

Key Words: B20 temperature sensor   FIR microcontroller   C52 intelligent control

目录

摘    要 I

Abstract II

图清单 Ⅳ

表清单 Ⅳ

1 绪论 1

2 系统概述 3

2.1设计任务 3

2.2 主要内容 3

3 系统硬件设计 4

3.1 4位共阳数码管 4

3.2 C52单片机 5

3.3 18B20温度传感器 6

3.4 发光二极管 8

3.5 自锁开关 8

3.6 三极管 9

3.7 热释电红外传感器 11

3.8 菲涅耳透镜 11

3.9 BISS0001 12

4 系统软件设计 15

4.1 系统总体设计 15

4.2 主程序流程框图 15

5 调试与结论 17

5.1调试 17

5.2 结论