温湿度控制系统-房小凤.docx

毕业设计报告(论文)
题目:基于单片机的温湿度控制系统
所属系电子信息工程系
专业应用电子技术
学号 1202091215005
姓名房小凤
指导教师王鹏元
起讫日期 2014年10月16
设计地点 CAD/CAM实训室
基于单片机的温湿度控制系统
摘要
温湿度控制已成为当今社会研究的热门项目。是工农业生产过程中必须考虑的因素。作为最常见的被控参数。温度和湿度已经不再是相互独立的物理量,而应在系统中综合考虑。广泛应用于实验室、大棚、花圃、粮仓乃至土壤等各个领域。而传统的温湿度控制则利用湿度表、毛发湿度表、双金属式测量计和湿度试纸等测试器材。通过人工进行检测。对不符合温度和湿度要求的库房进行通风、降温、去湿等操作。这种人工测试方法费时费力,效率低。切随机性较大。误差大。因此就需要一种造价低廉、使用方便且计算精确的温湿度控制仪器。利用单片机对温、湿度控制,具有控温、湿精度高、功能强、体积小、价格低,简单灵活等优点,很好的满足了工艺要求。
本文通过使用AT89C51单片机、DHT11传感器模块、1602液晶显示屏模块以及报警模块。简单明了的实现的可提要求。DHT11数字温湿度传感器把采集到的温湿度数据传给单片机。经过单片机的处理。准确的显示到液晶屏上。并对温湿度设置上下限。越限报警。

关键词:单片机 DHT11传感器 1602液晶显示屏 AT89C51 报警
Abstract
The temperature and humidity control has e a popular project in today's social studies. Is the industry and agriculture production process must consider the factors. As the mon is accused of parameters. Temperature and humidity is no longer is independent of each other physical quantities, and in the system should be considered. Widely used in laboratory, awning, flower bed, granaries and soil, and other fields. While the traditional temperature and humidity control is use of humidity table, hair humidity table, double metal type gauge and humidity dipstick test equipment. Through the artificial testing. Not in conformity with the requirements of the temperature and humidity supply cooling, ventilation, to wet operation. This artificial testing time-consuming, the efficiency is low. Cut large randomness. Error. Hence the need for a cheap and easy to use and the calculating accurate temperature and humidity control instruments. Using single chip puter to control temperature and humidity, temperature control, wet with high precision and strong function, small volume, low price, advantages, such as simple nimble, meet the technological requirements.
This article through the use of AT89C51 microcontroller, DHT11 sensor module, 1602 LCD screen module and alarm module. Simple and clear implementation can be asked. DHT11 digital temperature and humidity sensors to the