Design Of Smoke Alarm Based On Microcontroller

At present,mankind is stepping into the information age.Smart home is the product of information society.Remote alarm system has become the basis for safety management of household equipment.The domestic research is devoted to the fire alarm system in the comprehensive place,and the smoke alarm system suitable for the family should not only meet the requirements of the small structure,but also the economic benefits.In order to monitor and realize remote alarm for household gas,this paper designed a remote smoke alarm system based on single chip microcomputer,which can realize the function of sound and light alarm,alarm state character display and so on.In the aspect of hardware design,AT89C52 single chip computer is selected,and MQ-2 semiconductor gas smoke sensor is equipped with AD module.A 6 × 6 × 5keystroke module composed of an active electromagnetic acousto-optic device,a9015 PNP transistor and a LED lamp is used to inform the current smoke concentration alarm module.In software design,it includes main program,acousto-optic alarm subroutine,display subroutine,sensor concentration detection subprogram and GPRS module subroutine.The system test shows that the system can detect fire accurately and alarm quickly in the early stage of fire.The designed smoke alarm system has the advantages of simple structure,stable performance,convenient use,low price,intelligence,convenient installation,low maintenance cost and so on.It is not only suitable for home use,but also suitable for work.Workshop and other places,has a certain practical value.