PM25液晶显示论文.doc

题 目：基于单片机多功能 环境检测系统研究 随着经济的发展，人们越来越关注污染程度日益严重的居住环境。他们开始利用高科技产品及时对居住环境进行检测，从而及时了解环境状况 。 伴随着单片机技术的飞速发展，通过单片机开发的检测仪器越来越小型化和多样 化，然而对环境检测的多功能设备却很少被开发出来 。 本文主要介绍了基于单片原理开发的环境检测系统。该系统把单片机的控制技术和 传感器技术相结合，开发成多功能环境检测系统。通过它对温湿度传感器、燃气浓度传 感器、甲醒浓度传感器以及粉尘传感器的控制，实现对家庭环境的温湿度、燃气浓度、甲醒浓度、空气颗粒大小的采集。采集的数值经过 AI D 模数转换，再传输给单片机读取，然后传输给液晶显示屏显示 ，达到对室内环境的多功能检测和及时显示，使得室内环境 状况一目了然 。当检测值超出预设值时，单片机驱动蜂鸣器报警 ，使得用户及时发现环 境的具体状况，从而为用户的居住生活带来舒适和安全 。从而摆脱检测仪器的简单、独 立的缺点而实现检测仪器的系统化、小型化、高效率和多功能。 关键词：室内环境检测，单片机，传感器技术，PM2. 5  PAGE 3 Abstract With the development of economy, people are paying more attention to the living environment pollution is increasingly serious. They began to use the high-tech products in a timely manner to test the living environment, and in a timely manner to understand the status of the environment. Accompanied by single-chip computer technology rapid development, through the single-chip microcomputer detecting instrument is more and more miniaturized and diversified development. Detection of multi-function equipment to the environment, however, is rarely developed. This article mainly introduced the development of environment detection system on the basis of the principle of single chip. The system of the single chip microcomputer control technology and sensor technology,developed into a multifunctional testing system environment. Through its sensor for temperature and humidity sensor, the gas concentration in the dust, formaldehyde concentration sensor and sensor control, implementation of home environment tempera阳re and humidity, gas concentration and the concentration of formaldehyde，the air particles the size of the collection. Acquisition value after AID analog-to-digital conversion, to transmit to MCU read again，and then transferred to the LCD display shows, reached for the indoor environment of the multi-function detection and display in time, make indoor environment condition be clear at A glance. When values beyond the preset value, MCU drive buzzer alarm, allows the user