Abstract
Withthedevelopmentofurbanization,itisnecessarytoinstallhomealarmsystemin
moreandmorebuildings.ThesystemusesAT89S52microcontroller,themicrocontroller
costperformanceisrelativelyhigh.Thefiredetectionunitusesthegasandtemperature
sensorstodetecttheindoorenvironment.TheA/Dconversionchipisusedfor
analog-to-digitalconversionandthensenttothesinglechipmicrocomputer.Whenthe
limitvalueisexceeded,thebuzzerofthesoundalarmcircuitwillsendoutanalarm;
DigitalLEDdisplaycircuitcandisplaythecurrentindoorte
基于单片机的居家报警系统-5081字.pdf