STC89C52单片机的PM2.5检测仪设计
毕业论文关键词：单片机 传感器技术 PM2.5
PM2.5 Detector Based on 51 Single Chip Microcomputer
Abstract With the gradual deepening of reform and opening up, economic development is very rapid. People's living standard also will continue to improve.So people for their own living environment has become very high.People have more and more attention to the serious pollution of the environment. People develop a variety of high-tech products to detect the living environment and understand the situation of their living environment. At the same time, single chip microcomputer also continue to grow. The SCM development of various testing instruments become smaller and smaller,but their function become more and more. So, using a SCM to design a measuring instrument of PM2.5 is very meaningful. This paper introduce the design of a measuring PM2.5 system. This system mainly has two parts, one part is a single chip microcomputer, another part is a sensor.The sensor collect the PM2.5’s concentration in the air. After analog-to-digital conversion, information transmits to the SCM.At the last,the result displays on the screen.This design can detect air quality and let people have a clear understanding of their own living environment .Then people will have the consciousness of environmental protection. It has a certain significance and it is practicality.
Key Words: Single Chip Microcomputer Journal of Transducer Technology PM2.5
目录
摘要I
Abstract.II
目录III
1绪论1
1.1概述1
1.2设计的主要内容1
2主要控制器和器件.3
2.1单片机3
2.2粉尘传感器4
2.3模数转换芯片ADC0832.5
2.4LCD1602液晶显示屏.6
3硬件电路设计.8
3.1系统概述8
3.2单片机最小系统8
3.3采集电路设计9
3.4LCD显示模块设计10
3.5报警电路设计.11
3.6按键电路设计.11
4软件部分设计12
4.1主程序设计.12
4.2初始化编程.13
4.3中断程序设计.13
5系统的调试及下载14
5.1硬件的调试.14
5.2软件的调试.14
5.3软件的下载.15
6设计遇到的问题及解决办法17
6.1元器件的选取.17
6.2电路的排版.17
6.3电路的调试.18
7结论.19
参考文献.20
致谢.21
1 绪论 1.1概述 人们的生活水平在不断的提高，所以人们就想过得越来越好，无论是物质还是精神，而空气的质量与人们的生活息息相关。由于经济发展体系的不完善，所带来的一系列环境污染问题越来越严重，导致人们也越来越关注自己居住在一个什么样的环境里面。 环境污染越来越严重，雾霾天气在全国各地不断出现，严重影响人们的日常出行，所以大家对于环境污染越来越重视，希望自己可以生活在一个没有雾霾的环境当中，每天可以呼吸到健康的空气。所以设计一款检测 PM2.5 的仪器可以为大家带来很多便捷，让人们可以意识到自己处在一个什么样的环境，方便大家做好防范措施，并且对改善环境也有一定的积极作用。天气预报也可以看到当地的PM2.5大体情况，但是却不是实时的。天气预报测量出来的值是某一个地区某个时间段的情况，而设计的这款 PM2.5 检测仪大小适中，方便携带，可以随时测量所处环境的 PM2.5，具有一定的市场价值。 很早以前检测环境非常的复杂，需要去采集样品，然后到实验室做实验进行分析。现在检测方法已经在不断的进步，由人工向智能化发展。没有了那么多繁琐的过程，每个人就可以很直观的了解到空气质量是否良好。环境检测的核心也在改变，逐渐开始采用单片机，使得检测功能更加的多样化，检测更加快速准确。所以，本设计采用单片机为核心， 灰尘检测传感器采集数据，LCD显示，蜂鸣器报警，从而实现快速高效的测量。