完整word版外文翻译基于单片机的红外防盗报警系统设计.docx

完整word版外文翻译基于单片机的红外防盗报警系统设计.docx

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完整word版外文翻译基于单片机的红外防盗报警系统设计

外文原文

Basedoninfraredalarmtechnologysecuritysystems

1theintroduction

1.1theresearchsignificanceofthistopicresearchsituationathomeandabroad.

Withthedevelopmentofsocietyandscienceandtechnologyunceasingdevelopment,people'slivingstandardsbeenimprovedgreatly,andtotheprivatepropertyprotectionmeansintheunceasingenhancement,theintelligentfacilitiesforanti-theftputsforwardnewrequirements.Thisdesignistomeettheneedofmodernresidentialanti-theftdesignedfamilyelectronicalarmsystem.Itinpreviousdevicesbasedonimprovedgreatly,becauseusethesingle-chipprocessorsignal,notonlycanusedforsingleresidentialarea,alsocanbeusedinalarge-scaleresidentialsecuritysystems.It'sthejoboftheperformanceisgood,donotappeartoreportandmisstatementphenomenon,safeandreliable.

Inourcountry,thepresentmarketconditionalarmbasicallyhastriggeredalarmsystempressureswitchelectronandalarmsystemandpressureshadingtriggeredalarmsystem,etc.Variouskindsofalarm,butthisseveralcommonalarmtherearesomeshortcomings.ThissystemUSESahumanpyroelectricinfraredsensorinthehumanbodydetectorintheflied,passivepyroelectricinfrareddetectorsbecauseofitslowcost,easyfabrication,lowcost,installationismoreconvenient,anti-theftperformanceisstableandhighsensitivity,safeandreliable,hasattractedbroadfamilycharacteristicssuchaspopularwiththecustomers.Andalarmsinstallationconcealment,noteasilybyroguefound.

1.2infraredalarmtechnologyintroduction

1.2.1natureobjectsoftheinfraredradiation

Thenatureofanyobject,aslongasthetemperatureaboveabsolutezero（273℃）,constantlyoutwardissuedinfraredradiation,andtravelatthespeedoflightenergy.Objectradiateoutwardinfraredradiationofenergyandtheobjectoftemperatureandinfraredradiantwavelength.Assumingobjectslaunchinginfraredradiationofpeakwavelengthforafew,itstemperatureforT,theradiationenergyequalsinfraredradiationofpeakwavelengthgerbenandobjectproducttemperatureT.Thisproductisaconstant,namely:

Thehigherthetemperatureoftheobjects,emitinfraredradiationofthesmallerpeakwavelength,sendoutinfraredradiationenergyisbiggeralso.

1.2.2.pyroelectriceffect

Passiveinfrareddetectoralsocalledpyroelectricinfrareddetector,itsmainworkingprincipleispyroelectriceffect.Pyroelectriceffectmeansifmakesomestrongdielectricmaterial（suchasqinbatio3,qinwrongacidleadP（zT）,etc.）ofthesurfacetemperaturechanges,thenwiththetemperatureriseorfall,materialsurfaceoccurspolarization,namelyonthesurfaceofthechargewillbeproducedchange,andmaterialsurfacechargelostbalanceandeventuallychargewillchangewithvoltageorcurrentformoutput.

1.2.3pyroelectricinfraredsensorbasicstructure

Pyroelectricinfraredsensorsfromsensordetectionyuan,interferencefiltersandmosfetverifierthreeparts.Accordingtothenumberofdetectingyuantopoints,pyroelectricinfraredsensorshaveunit,doubleyuanhefouryuantowaitforafewkinds,forhumandetectionofinfraredsensoradoptsdoubleyuanorfouryuantypestructure.Accordingtopyroelectricinfraredsensorutilitycent,havethefollowingkinds:

usedformeasuringtemperaturesensor,it'sthejobofthewavelengthof（1-20）nano,Usedforflamedetectionsensor,it'sthejobofthewavelengthfor

0.435+/-0.15nano,Forhumandetectionsensor,it'sthejobofthewavelengthof7to15feet.Figure1.2isadoubledetectionyuanpyroelectricinfraredsensorstructureschematicdrawing.Thesensorwilltwooppositepolarity,special

1.2.4pyroelectricinfrareddetectorbasicprinciple

Pyroelectricinfraredsensorbyreceivingmobilehumanradiationthatcertainwavelengthsofinfraredradiation,canbetransformedintoandhumanbodymovementspeedanddistance,thedirectionoflow-frequencysignalsabout.Whenpyroelectricinfraredsensorbyirradiationsourcesofradiation,itsinternalsensitivematerialstemperatureswillrise,polarizationintensityisabate,surfacechargereduce,usuallywillreleasethispartofthechargecalledpyroelectriccharge.Becauseofpyroelectricchargehowmanycanreflectmaterialchangesoftemperature,sobypyroelectricchargebycircuittransformedintotheoutputvoltagecanalsoreflectmaterialchangesintemperature,thusdetectirradiationenergychanges.

2hardwaresystemdesign

2.1infraredanti-theftalarmsystemhardwaredesign

Becausethisdesignfocusesonfamilyguardagainsttheft,real-timemonitoringofanarrowerrange,sothisdesignbysimplyusingapassiveinfrareddetectorisenough.Therefore,infraredintelligentanti-theftalarmsystem,andthespecificdesignrequirementsfor:

（1）completestohighsensitiveinfraredsensord