人体感应智能温控风扇的设计
人体感应智能温控风扇的设计(任务书,开题报告,论文13000字)
摘要
在人民群众的日常生活和企业工厂的生产生活中，风扇扮演着一个十分重要的角色。近年来，随着各种温度传感器与相关温度控制技术的进步和发展，人体感应智能温控风扇也在人们的生活中发挥着越来越重要的作用。人体感应智能温控风扇可以根据环境温度与是否有人活动自动调节风扇的启动、停止与转速。在日常生活中，人体感应智能温控风扇不仅可以节省宝贵的资源，而且极大的方便了人们的生产与生活。
本设计是一种人体感应智能温控风扇系统，具有敏感的人体感应和温度感测功能，整个设计以STC89C52单片机作为主控芯片，将DS18B20数字温度传感器与HC-SR501人体红外传感器相结合来控制风扇转速。当风扇处于人体感应智能温控模式时，人体红外传感器HC-SR501用于检测是否有人活动，DS18B20数字温度传感器用于采集当前环境的实时温度，将两种数据经过I/O口传入单片机，经处理后通过两个三极管构成的驱动电路驱动直流风扇的电机。用户可设定温度的上下限值。通过计算实时温度值与上限和下限温度值的差值，输出PWM信号控制风扇的转动，停止和转速，实现自动无极调速。当系统处于三挡可调速模式时，可以通过按键调节风扇以不同的三挡风速转动。当系统处于自然风模式时，系统输出随机信号，控制风扇的开关与转速，模拟自然界的微风。
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关键词：人体感应；温控风扇；单片机；DS18B20；HC-SR501
Abstract
In the daily life of the people and the production and life of the factory, the fan plays a very important role. In recent years, with the advancement and development of various temperature sensors and related temperature control technologies, human body sensing intelligent temperature control fans are playing an increasingly important role in people's lives. The human body sensing intelligent temperature control fan can automatically adjust the start, stop and speed of the fan according to the ambient temperature and whether there is any activity. In daily life, the human body induction intelligent temperature control fan not only saves valuable resources, but also greatly facilitates people's production and life.
The design is a human body induction intelligent temperature control fan system with sensitive human body sensing and temperature sensing function. The whole design uses STC89C52 single chip microcomputer as the main control chip, and combines DS18B20 digital temperature sensor with HC-SR501 human body infrared sensor to control. speed of the fan. When the fan is in the human body sensing intelligent temperature control mode, the human body infrared sensor HC-SR501 is used to detect whether there is any activity. The DS18B20 digital temperature sensor is used to collect the real-time temperature of the current environment, and the two data are transmitted to the MCU through the IO port, and processed. The motor of the DC fan is driven by a drive circuit composed of two triodes. The user can set the upper and lower limits of the temperature. By calculating the difference between the real-time temperature value and the upper and lower temperature values, the output PWM signal controls the rotation, stop and rotation speed of the fan to realize automatic stepless speed regulation. When the system is in the three-speed adjustable speed mode, the fan can be adjusted to rotate at different three-speed wind speeds by pressing the button. When the system is in natural wind mode, the system outputs a random signal to control the switch and speed of the fan to simulate the natural breeze.
[资料来源：Doc163.com]
Key Words:Human body induction;temperature controlled fan;single chip microcomputer;DS18B20;HC-SR501
[资料来源：https://www.doc163.com]
目录
第1章绪论 1
1.1 研究目的及意义 1
1.2 系统功能设计 1
第2章设计方案选取 3
2.1 主控芯片选取 3
2.2 温度传感器选取 3
2.3显示设备选取 4
2.4调速方式选取 4 [资料来源：https://www.doc163.com]
第3章系统硬件设计 6
3.1 硬件系统整体设计 6
3.2 控制芯片简介 7
3.2.1 STC89C52简介 7
3.2.2 STC89C52最小系统 8
3.2.3 STC89C52电路接口设计 9
3.3 温度采集模块 9
3.4 人体检测模块 10
3.4.1 HC-SR501工作原理简介 11
3.4.2 HC-SR501模块参数及特性 11
3.5 数码管显示模块 12
3.6 风扇驱动模块 13
3.7 按键模块 13
第4章系统软件设计 15
4.1 主程序设计 15
4.2 温度采集子程序设计 16
4.3 EEPROM初始化及读写子程序设计 17
4.4 风扇转速控制子程序设计 17
4.5 数码管显示子程序设计 18
4.6 按键子程序设计 19
第5章总结与展望 20
5.1 工作总结 20
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5.2 未来展望 20
参考文献 22
附录A 硬件电路原理图 23
附录B 部分程序 24
致谢 27 [版权所有：http://DOC163.com]