1、 摘摘 要要 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-2 传感器实现对气体的检测,
2、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 ADC0808 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 AT89C51 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 Abstract With the wide use of natural gas, each a residential towers were gas “enveloped“. The popularity of natural gas to publ
3、ic life brought convenient, reduce the citys 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 peoples life and property safety brought great threat. Faci
4、ng 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 microcomputer as the core design can realize the gas alarm sound-light alarm functions, is a kind of simple structure, stable performance, easy to use, inexpensive and intelligent gas alarm, has certain practical value. Among them choose MQ - 2 of gas detection senso