家用可燃气体报警器的设计.doc

摘要
随着可燃气体作为一种新型能源的应用,。一但可燃气泄露,极易发生火灾乃至爆炸,对人民的生命财产造成极大伤害, 我们需对各种可燃性气体在家庭中存在的情况进行有效的监控。
本文介绍了一种单片机控制的可燃气体报警器的电路, 在整个设计过程,分别从硬件和软件两个方面描述,即从硬件电路的设计方法到实现所要求功能的软件技术。该报警系统是以AT89S51单片机为控制器,先由气敏传感器QM-N5采集室内空气,再通过ADC0804进行摸—数转化,所得到的数据于原设定好的数据进行比较分析,最后得出天然气或液化气的浓度是否超标,如不超标则继续采集下一组气体样本,如超标根据超标量进行高低不同的分级报警, 并控制相应设备进行工作, 以达到安全保护的作用。
关键词:天然气、单片机、气敏传感器、驱动控制、分级报警
Abstract
With bustible gas as new energy applications, which bring great convenience to the daily lives of the people, but also bring some new dangers. Once the gas leak, which is so easy to cause fire ,and even the explosion,the lives and property of the people can be great harmed, We need to conduct effective monitoring to all kinds bustible gases that exist in the family .
In this paper, we design a control bustible gas alarm circuit, throughout the design process with single-chip, during the whole designed process, include both hardware and software description. That is, from the hardware circuit design method to achieve the required function of software technology. The alarm system is based on single-chip controller AT89S51, Gas sensors by the QM-N5 collection of indoor air, ADC0804 conducted Analog and digital conversion, These data pare with that set in the original analysis of good data, then Judge the conclusion whether the concentration of natural gas or liquefied petroleum gas is excessive, I