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1、外文原文Basedoninfraredalarmtechnologysecuritysystems1theintroduction1.1theresearchsignificanceofthistopicresearchsituationathomeandabroad.Withthedevelopmentofsocietyandscienceandtechnologyunceasingdevelopment,people'slivingstandardsbeenimprovedgreatly,andtotheprivatepropertypro
2、tectionmeansintheunceasingenhancement,theintelligentfacilitiesforanti-theftputsforwardnewrequirements.Thisdesignistomeettheneedofmodernresidentialanti-theftdesignedfamilyelectronicalarmsystem.Itinpreviousdevicesbasedonimprovedgreatly,becauseusethesingle-chipprocessorsignal,n
3、otonlycanusedforsingleresidentialarea,alsocanbeusedinalarge-scaleresidentialsecuritysystems.It'sthejoboftheperformanceisgood,donotappeartoreportandmisstatementphenomenon,safeandreliable.Inourcountry,thepresentmarketconditionalarmbasicallyhastriggeredalarmsystempressureswitch
4、electronandalarmsystemandpressureshadingtriggeredalarmsystem,etc.Variouskindsofalarm,butthisseveralcommonalarmtherearesomeshortcomings.ThissystemUSESahumanpyroelectricinfraredsensorinthehumanbodydetectorintheflied,passivepyroelectricinfrareddetectorsbecauseofitslowcost,easyf
5、abrication,lowcost,installationismoreconvenient,anti-theftperformanceisstableandhighsensitivity,safeandreliable,hasattractedbroadfamilycharacteristicssuchaspopularwiththecustomers.Andalarmsinstallationconcealment,noteasilybyroguefound.1.2infraredalarmtechnologyintroduction1.
6、2.1natureobjectsoftheinfraredradiationThenatureofanyobject,aslongasthetemperatureaboveabsolutezero(273℃),constantlyoutwardissuedinfraredradiation,andtravelatthespeedoflightenergy.Objectradiateoutwardinfraredradiationofenergyandtheobjectoftemperatureandinfraredradiantwaveleng
7、th.Assumingobjectslaunchinginfraredradiationofpeakwavelengthforafew,itstemperatureforT,theradiationenergyequalsinfraredradiationofpeakwavelengthgerbenandobjectproducttemperatureT.Thisproductisaconstant,namely:Thehigherthetemperatureoftheobjects,emitinfraredradiationofthesmal
8、lerpeakwavelength,sendoutinfraredradiationenergyisbiggeralso.1.2.2.pyroelec
