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1、AutomaticfirealarmsystembasedonMCUAbstract:Thepaperintroducedanautomaticwarehousefirea1armsystembasedonMCU.ThesystemwasmainlymadeupofATmega16,temperaturesensors,smokesensors,andEX-1autodialedalarmmodule.Inthesystem,temperaturesignalsweretransformedtoserialdata,andsmokesignalsweretransformedtovolt
2、agesignals.AllthedatawereprocessedbyMCU.Whenthesurveillancesystemcheckedfireinwarehouse,alarmsignalwasturnon,meanwhilethemessagesweretransmittedtomanagersthroughEX-1.Applicationofthesystemwasconvenienttodealwithfirein-time,efficientlybywarehousemanager.Keywords:firealarmtransducer;smokesensorsyst
3、em;ATmega16;temperaturetransducer;smokesensorI.INTRODUCTIONAutomaticfirealarmcontrolsystemhasexperiencedaprocessfromthesimpletothecomplexandintelligencesystemincreasinglyinChina.Thecharacteristicisautomaticfiredetectionandalarmtechnologyhasagreatprogressalongwithcomputinganddetectiontechnologydev
4、elopment.Atpresent,automaticfirealarmcontrolsystemwasusedinbulkstorageplant,shoppingmalls,high-levelofficebuildings,hotelsandotherplaces.Theywereusedinanumberofcollectionsfocusedononeareaofintelligentalarmcontrolmethodwithhigherlevelsofbus-typealarmcontrolsystem,andinsomeresidentialareasandcommer
5、cialbuildingswereinstalledbyasingleautomaticfirealarmdetectiondevice.Thesealarmdetectiondevicesfailtoreportsometimes,ormisinformation.Itsreliabilityisnothighbecauseofusingsinglesensor.Therefore,itisneededtodevelopasimplestructure,lowcost,highreliability,fastresponding,automaticfiredetectionsystem
6、.II.GENERALPROJECTOFTHESYSTEMThehardwareblockdiagramshowninFigure1,hardwarebytemperaturesensors,smokesensors,signalprocessingmodule,MCUmodulesandautomaticalarmmodule.Nonelectricalquantitythatisthroughthesensingelementsensors(smokesensorsandtemperaturesensors)willbeon-sitetemperature,smokeandother
7、non-electricalsignalintoanelectricalsignal,aswellassignalsforsignalprocessingtoconvertanalogquantitytodigitalquantity.Finally,thesampleddatawereprocessedandcomparedwiththelimitsbyMCUsystem.Thissystemcanproducelocalandr
