摘要
全国燃气行业发展迅猛，液化气、天然气、煤气等城市燃气作为清洁能源已在工商业和城镇居民用户中得到广泛应用，特别是随着“西气东输”工程的快速进展，燃气行业发展潜力巨大。
但是随着燃气的广泛应用，由于燃气泄漏所引发的爆炸、中毒和火灾事故也时有发生，这在某种程度上增加了城市的不安全和不稳定因素。为了使燃气更好地造福于民，造福于社会，减少并杜绝各种因燃气泄漏而引发的爆炸及火灾事故，各燃气使用单位及居民用户选择一种适合的室内煤气泄露报警器实为必要之举。燃气报警器的核心是气体传感器及单片机。当气体传感器遇到燃气时，传感器电阻随燃气浓度而变化，随之产生电信号，供燃气报警器后级线路处理。经过电子线路处理变成浓度成比例变化的电压信号，由线性电路加以补偿，使信号线性化，经微机处理、逻辑分析，输出各种控制信号，即当燃气浓度达到报警设定值时，燃气报警器发出声光报警信号并可显示燃气浓度或启动外部联运设备。
本文正是通过分析目前燃气报警器的现状，设计制作室内故障监测报警系统，保障人们的生命财产安。
关键词：煤气报警；煤气泄漏；传感器；监测
THE DESIGN OF ALARM FOR GAS LEAKING
ABSTRACT
The rapid development of the national gas industry, liquefied gas, natural gas, coal gas and other city gas as a clean energy business and urban residents in users has been widely used, and gas industry has great potential.
But with the extensive use of gas, due to gas leak caused an explosion, poisoning and fire accidents have also occ- urred to some extent, increased the city's insecurity and instability. In order for gas to better benefit the people, the benefit of the community, to reduce and eliminate all due to gas leak caused the explosion and fire, the gas unit and residential customers use to select a suitable indoor gas leak alarm is actually necessary move. Gas sensor is the core of combustible gas. When the gas face gas sensor, the sensor resistance change with gas concentration, the resulting electrical signal for processing of combustible gas line after the class. After dealing with electronic circuit into a voltage proportional to the concentration change signal to be compensated by the linear circuit, the signal linearization, by computer processing, logical analysis, the output of various control signals, that is, when the gas concentration alarm set value , combustible gas audible alarm signal can display gas concentration or start an external transport equipment.
It is through this analysis of the current status of combustible gas, indoor design fault monitoring alarm system to protect people's lives and property.
Key words:Gas Leak;Gas Alarm;Sensor;Monitoring
目录
1 绪论 (1)
1.1 课题背景及目的 (1)
1.2 国内外研究状况 (2)
1.3 设计内容及研究方法 (2)
2 系统方案及模块设计 (4)
2.1 设计思路 (4)
2.2 设计框图 (4)
2.3 系统模块设计 (5)
2.3.1气体浓度检测模块 (5)
2.3.2温度检测与显示模块 (7)
2.3.3主控制模块 (10)
2.3.4 声光报警模块 (11)
3 硬件电路设计 (12)
3.1 气体检测模块的设计 (12)
3.2 温度检测及显示模块的设计 (13)
3.3 单片机模块的设计 (18)
3.4 声光报警模块的设计 (18)
4 程序设计 (20)
4.1 温度采集部分程序设计 (22)
4.2 显示部分程序设计： (23)
4.3 主函数程序设计： (24)
4.4 中断函数设计 (25)
总结
参考文献 (29)
致谢 (30)
附录A (31)
附录B (37)
附件1
