摘要：随着社会经济的发展和人们环保意识的提高，越来越多的居民已经使用煤气，天然气等更加环保能源。相比于传统的煤炭，天然气和煤气在带给我们更加便利的生活的同时，也带来一定的危险，这些气体一旦使用不慎，发生泄漏，将极容易产生火灾，爆炸，中毒等事故，造成生命财产的损失。因此，研制燃气泄漏监测与报警装置就十分重要。
本课题是设计基于单片机的燃气报警器，利用气体传感器将气体浓度转变成电信号，然后传到单片机ATmega16中，由单片机进行处理，浓度值在显示器上显示出来，当浓度值超过报警值时，触发灯光报警电路进行报警，同时实现打开排风扇，关闭阀门等功能。
关键词：气体传感器 燃气泄漏 单片机系统 报警电路
毕业设计说明书外文摘要
Title Design of Gas Leakage Monitoring and Alarming Device based on SCM
Abstract：With the development of social economy and the improvement of people's awareness of environmental protection, more and more residents have already used gas, natural gas and other environmental friendly energy sources. Compared with the traditional coal, natural gas and coal gas to bring us a more convenient life at the same time, it also brings certain risk, once the gas leak, careless use, will be very prone to fire, explosion, poisoning and other accidents, resulting in loss of life and property. Therefore, it is very important to develop gas leak monitoring and alarming device.
This task is the design of gas alarm based on SCM，which convert the gas concentration into electrical signals using gas sensor and processed it with MCU-ATmega16. The concentration is displayed on the monitor. When the concentration value exceeds the alarm value, the SCM will trigger the light alarm circuit to alarm, and open the exhaust fan, turn off the valve and other functions at the same time.
Key words: Gas sensor Gas leakage SCM system Alarm device circuit
目 录
1. 绪论 1
1.1 课题的背景、目的和意义 1
2. 系统总体方案的设计 2
2.1 系统设计思路 2
2.2 系统原理及基本框图 2
3. 硬件设计 4
3.1 传感器 4
3.1.1 传感器的选择 4
3.1.2 常见气体传感器 4
3.1.3 传感器的选定 5
3.2 温湿度传感器 5
3.3 单片机 8
3.3.1 ATmega16的简介 8
3.3.2 ATmega16的引脚功能 8
3.3.3 复位与晶振电路 9
3.4 下载电路 9
3.5 显示屏电路 10
3.6串口通信电路 11
3.7 声光报警电路 12
3.8 应急处理系统 12
3.8.1 排气扇控制电路 12
3.8.2 阀门关闭装置控制电路 基于可调喷管的复杂装药发动机内弹道预示研究:http://www.chuibin.com/jixie/lunwen_205534.html