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1、外文原文Basedoninfraredalarmtechnologysecuritysystems1theintroduction1.1theresearchsignificanceofthistopicresearchsituationathomeandabroad.Withthedevelopmentofsocietyandscienceandtechnologyunceasingdevelopment,people'slivingstandardsbeenimprovedgreatly,andtothepri
2、vatepropertyprotectionmeansintheunceasingenhancement,theintelligentfacilitiesforanti-theftputsforwardnewrequirements.Thisdesignistomeettheneedofmodernresidentialanti-theftdesignedfamilyelectronicalarmsystem.Itinpreviousdevicesbasedonimprovedgreatly,becauseuset
3、hesingle-chipprocessorsignal,notonlycanusedforsingleresidentialarea,alsocanbeusedinalarge-scaleresidentialsecuritysystems.It'sthejoboftheperformanceisgood,donotappeartoreportandmisstatementphenomenon,safeandreliable.Inourcountry,thepresentmarketconditionalarmb
4、asicallyhastriggeredalarmsystempressureswitchelectronandalarmsystemandpressureshadingtriggeredalarmsystem,etc.Variouskindsofalarm,butthisseveralcommonalarmtherearesomeshortcomings.ThissystemUSESahumanpyroelectricinfraredsensorinthehumanbodydetectorintheflied,p
5、assivepyroelectricinfrareddetectorsbecauseofitslowcost,easyfabrication,lowcost,installationismoreconvenient,anti-theftperformanceisstableandhighsensitivity,safeandreliable,hasattractedbroadfamilycharacteristicssuchaspopularwiththecustomers.Andalarmsinstallatio
6、nconcealment,noteasilybyroguefound.1.2infraredalarmtechnologyintroduction1.2.1natureobjectsoftheinfraredradiationThenatureofanyobject,aslongasthetemperatureaboveabsolutezero(273℃),constantlyoutwardissuedinfraredradiation,andtravelatthespeedoflightenergy.Object
7、radiateoutwardinfraredradiationofenergyandtheobjectoftemperatureandinfraredradiantwavelength.Assumingobjectslaunchinginfraredradiationofpeakwavelengthforafew,itstemperatureforT,theradiationenergyequalsinfraredradiationofpeakwavelengthgerbenandobjectproducttemp
8、eratureT.Thisproductisaconstant,namely:Thehigherthetemperatureoftheobjects,emitinfraredradiationofthesmallerpeakwavelength,sendoutinfraredradiationenergyisbiggeralso.1.2.2.pyroelec
