天然气泄露报警控制器设计.doc

伊犁师范学院电子与信息工程学院 201 3 届本科毕论文( 设计) 论文题目: 天然气泄漏报警控制器设计作者姓名: 李龙江班 级:09 -2班专 业: 电子信息科学与技术学 号: 09071201016 指导教师: 肖辉高级讲师完成时间: 201 3年4月 26日电子与信息工程学院二〇一三年四月天然气泄漏报警控制器设计内容摘要随着天然气的大量使用,每一座居民大楼都被天然气所“笼罩”。天然气的普及给公共生活带来了方便, 减少了城市的污染, 提高了生活质量和效率, 但是同时,天然气也是潜在的“危险品”, 一旦发生大面积泄漏, 处置不及时就可能引发大爆炸, 给居民的生命财产安全带来巨大的威胁。面对燃气泄漏而造成的种种事故威胁,我们需要一个解决办法。使用天燃气报警器是对付燃气无形杀手的重要手段之一。本论文以半导体气敏传感器和单片机技术为核心设计的气体报警器可实现声光报警功能,是一种结构简单、性能稳定、使用方便、价格低廉、智能化的气体报警器,具有一定的实用价值。其中选用 MQ- 5 传感器实现对气体的检测,具有灵敏度高、响应快、抗干扰能力强等优点,而且价格低廉,使用寿命长。其与转换器连接,将气体信号转换成单片机可识别的数字信号,经单片机处理,并对处理后的数据进行分析,是否大于或等于某个预设值(也就是报警限),如果大于则会自动启动报警电路发出报警声音, 反之则为正常状态。关键词: 传感器报警器单片机 Gas leakage alarm controller design A bstract With the wide use of natural gas, each a residential towers were gas "enveloped". The popularity of natural gas to public life brought convenient, reduce the city's pollution and improve the life quality and efficiency, but at the same time, natural gas is also potential "dangerous", once produce large leak, disposal not timely could trigger, the big bang to people's life and property safety brought great threat. Facing the gas leak all kinds of accidents caused by threats, we need a solution. Use of natural gas alarm is deal with gas invisible killer one of the important means. This papers to the semiconductor gas sensors and single chip puter as the core design can realize the gas alarm sound-light alarm functions, isa kind of simple structure, stable performance, easy to use, inexpensive and intelligent gas alarm, has certain practical value. Among them choose MQ -5 of gas detection sensor realize, has a high sensitivity, fast response, strong anti-jamming capability etc, and the price is low, service life long. converters connected with the gas signal, convert microcontroller can identify the digital signal processing, by for processing the data and analysis, whether is equal to or greater than the a default value (that is, the alarm limit), if> will automatically start alarm circuit warning voice, conversely for normal s