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摘要随着经济的发展，社会的进步，人们对自己的生活质量以及生命安全越来越重视，但是当前我国环境保护的形势越来越严峻，环境污染和生态破坏己经在一定程度上严重制约了经济的发展并日益威胁现代人的健康安全，其中由于空气污染所造成的经济损失和人群发病率的升高都十分惊人，空气污染通俗的来讲一般是个广义概念，它既指的是室内造成的空气污染，也指通常意义上的大气污染，同时也指在一些特定的行业中比如冶炼、采煤等空气环境下所带来的高危险。无论是以上哪种情形，其形成原因都是空气中的有害气体含量超标或浓度大于设定值所造成的。41596
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本课题首先分析了空气中CO、甲醛等易燃易爆有害气体的来源，指出日常生活中家庭燃气泄漏所带来的安全隐患，然后根据51单片机的特点和使用方法，以单片机为控制核心设计有害气体的监测系统，对有害气体的监测系统总体方案论述后，再进行分析所用的气体传感器的性能和工作原理，最后，着重论述了该系统的软件以及硬件的设计原理和方案。
当测量数据超过设置浓度值或浓度变化很快时，该系统能实时监测，发出声光报警，并在屏幕上显示测量的浓度，同时在超过设定值时可以自动报警。该系统能够广泛应用于居民家庭和企事业单位，从而大大降低由CO所引起的中毒、火灾、爆炸等事故的发生率，保障了人们的生命和财产安全，具有重要的实用价值。
该论文有图19幅，表1个，参考文献20篇。
毕业论文关键词：大气污染 有害气体 51单片机 传感器
Design of indoor harmful gas monitoring system
Abstract
With the development of economy, the progress of the society, people pay more attention to their quality of life and life safety and environmental protection in China, but the current situation is becoming more and more serious environmental pollution and ecological destruction has been to a certain extent restricted the development of economy and the growing threat of vice modern people's health and safety, which due to the increased the air pollution caused by the economic loss and the incidence rate of air pollution are very alarming, popular terms is usually a generalized concept, which refers to indoor air pollution, also refers to the common sense of air pollution, but also a high risk in some specific industries such as smelting, mining etc.
This paper begins with an analysis of the source of harmful gases Co, formaldehyde and other flammable in air, points out that daily life household gas leakage brought about security risks, then according to the characteristics and usage of 51 single-chip, MCU as the control core design the harmful gas monitoring system, for harmful gas monitoring the overall scheme of the system is discussed, the performance and working principle of gas sensor. In the end, we describe the system software and hardware design principle and scheme.
When the measured data is in excess of the set concentration or concentration change, real time monitoring, a sound and light alarm is sent out, and the concentration of the measurement is displayed on the screen.The system can be widely used in households, enterprises and institutions, so as to greatly reduce incidence caused by CO poisoning, fires, explosions and other accidents, ensure the safety of people's life and property, it has important practical value.
Key words: air pollution harmful gas 51 single-chip gas sensor
目 录
摘要 Ⅰ
Abstract Ⅱ
目录 Ⅲ
图清单 Ⅴ
表清单 Ⅴ
1前言 1
1.1研究背景与意义 1
1.2国内外研究现状 1
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