毕业设计（论文）-基于物联网的PM2.5实时监测系统的设计.doc

本科毕业设计 题目: 基于物联网的PM2.5实时监测系统的设计 学 院: 信息科学与工程 专 业: 电子信息工程 学 号: 学生姓名: 指导教师: 日 期: 二○一四年六月  摘 要 PM2.5是指大气中直径小于或等于2.5微米的颗粒物，也称可入肺颗粒物。与其它大气污染物相比，PM2.5粒径小，含有大量有毒、有害物质并且在空气中停留时间较长，对人体健康和环境质量的影响更大，已经引起了国内外普遍的高度关注。但目前，对于PM2.5的研究，国内外多数还停留在检测方法和仪器设备的开发上，面对监测系统网络化的研究很少，并且现在已研发出来的PM2.5监测设备因其价格昂贵、体积庞大、网络扩展能力差、系统运行维护费用高等特点，无法得到广泛应用。 本设计旨在开发一种体积小、成本低的PM2.5监测器并利用物联网监测数据，供人们对空气质量进行评估PM2.5浓度，并能将数据通过微博或微信的方式发送出来，用户可以通过手机实时查看。通过相关功能测试，证明该系统测量准确，应用前景广阔。 关键词： PM2.5； Arduino单片机； 实时监测； 物联网 Abstract PM2.5 refers to the particles in the atmosphere whose diameters are equal to or less than 2.5 microns, which are also called inhalable particles. Compared with other air pollutants, PM2.5 has smaller diameter and stays in the atmosphere for a longer time. It also has large amount of toxic, harmful substances. So the impact on human health and environmental quality is more remarkable, and has been highly concerned by the people all over the world. However, for the research related to PM2.5 now are still focusing on the development of detecting methods and devices, which are either expensive or massive. Some of the studies on developing monitoring systems based on the Internet cannot be widely used. The design in this thesis aims to develop a small-size, low-cost, PM2.5 monitor, which makes use of the Internet of Things to display real-time monitoring results in a portable way for users to evaluate the air quality. The key point of the design is to use a cheap and powerful Arduino micro controller, which is dedicated for sensor applications, to control the sampling and transmission of PM2.5. The main work includes: designing the circuit to connect Arduino micro controller and sensor hardware; coding to realize the air pollutants sampling by PM2.5 sensor under the control of Arduino; coding to transmit sensor data over the network to the Leweiso, which is a implementation of Internet of things; Configuring Leweiso, including setting