英文文献

DesignofwirelessburglaralarmbasedonMCUFortosteals,robsandsoonaccidentstocarryontheeffectivemonitorandthewarning,unifiedusingtheMCUAT89C51controllingtechnologyandtheinfrareddetectiontechnology,onekindofwirelessburglaralarmhasbeendesigned,itincludinghardwareandsoftwaretwoparts;Thehardwarepartiscomposedbytheinfraredsensor,sendandreceivemodule,MCU,acousto-opticwarningandsoon;Thesoftwarepartiscomposedofthemainprogramandmusicsubroutine.WithCortheassemblylanguagecompilationsourceprogram,carriesonthetranslationandthedebuggingintheKeilc51platform,afterdownloadstotheMCUAT89C51chip,andthisMCUandotherprimarydevicesweldingonthePCBboardaccordingtodesignacircuit.Onelectricity,closed-cyclecontrolswitch,whensomepeopleintrudeintheinfraredlauncharea,hastheacousto-opticwarning,indicatedthathasachievedthedesignrequirements.Thispaperappearsin:MultimediaTechnology(ICMT),2011InternationalConferenceon,IssueDate:26-28July2011,Writtenby:Guang-liLong©2011IEEESECTIONIPREFACEAlongwithtimeunceasingprogress,thepeoplelocatedtheenvironmentsecuritytooneselftoproposeahigherrequest,itwaslivingatthesecurityaspectparticularly,itmustpayattentiontheseunexpectedvisitorsfrequently.Nowmanyplotshaveinstalledtheintelligencealarmsystem,thusenhancedtheplotsafetyrategreatly,becauseinfraredisablacklight,usesthewirelesslaunchandthereceive,doesnotneedtheindependentwiring,ithastheverystrongconfidentialityandthesecrecy,thusinsecurity,securityinstallmentsandsoonsecuritytheuseshouldhavetheverybigsuperiority.SECTIONIIDESIGNOFSYSTEMHARDWAREThewirelessburglaralarmdiagrambasedonMCUasshowninFigure1.Thissystemincludinginfraredsensor,launchmodule,receivemodule,MCU,acousto-opticwarningandsoon.TheinfraredsensoriscomposedofthepyroelectricinfraredsensorRE200B,pyroelectricinfraredswitchBISS0001andmatchesthefewexternalconnectionprimarydevice.Thepyroelectriceffectandpiezoelectriceffectissimilar,itisreferstocausescrystalplaneelectricallychargedphenomenonasaresultofthetemperaturechange[1].Thepyroelectricsensoristothetemperaturesensitivesensor.Itiscomposedoftheceramicoxidecompoundorthepiezoelectriccrystalpart,itmakestheelectrodeintheparttwosurfaces,thetemperaturehasthechangeΔTwhenthesensormonitorscope,thepyroelectriceffectwillhavetheelectricchargeontwoelectrodesΔQ,namelywillproduceaweakvoltageΔVbetweentwoelectrodes.Becauseitsoutputimpedanceisextremelyhigh,ithasafieldeffecttubeinthesensortocarryontheimpedanceconversion.ThepyroelectriceffectproducestheelectricchargeΔQwillbeunifiedbytheairinionvanishes,namelywillworkaswhentheambienttemperaturewillbestablyinvariable,,thenthesensorwillrelief.Whenthehumanbodyenterstheexaminationarea,becausethehumanbodytemperatureandtheambienttemperaturehavethedifference,producesΔT,thenhastheoutputΔT;Ifafterthehumanbodyenterstheexaminationareamotionless,thenthetemperaturedoesnothavethechange,thesensorhasnotoutput.Thereforethiskindofsensorexaminationhumanbodyoranimal'sactivesensing.Theexperimentisprovedthatthesensordoesnotaddtheopticallens(alsotosayFresnellens),itsexaminationdistanceissmallerthan2m,butafteraddingontheopticallens,itsexaminationdistancemaybebiggerthan7m.Figure1ThewirelessburglaralarmdiagrambasedonMCUViewAll|NextRE200Bisthebinarycellpyroelectricinfraredsensor,itusesthepyroelectricmaterialpolarizationalongwiththetemperaturechangecharacteristicsurveyinfraredradiation,itusesthedoublesensitiveacomplementarymethodtosuppressthedisturbancewhichthetemperaturechangeproduces,itenhancedsensor'sworkstability.BISS0001isonesectionhasthehighperformancesensingsignalprocessingintegratedcircuit,itmatchesbythepyroelectricinfraredsensorandthefewexternalconnectionprimarydeviceconstitutionpassiveformpyroelectricinfraredswitch.Whensomepeopleentertheinductionscope,theinfraredsensoroutputsthehighlevel,thehumanleavestheinductionscopeautomatictimedelaytoclosethehighlevel,outputsthelowlevel.ThelaunchmodulemainlyconstitutesbycodechipPT2262andwirelesslaunchmoduleFS1000A[2].CodechipPT2262carriesonthecodetoinfraredsensor'sserialnumber,whatthePT2262launchpressedkeysendsoutisinfraredsensor'scodedsignal,itscodedsignaliscomposesacompletesymbolbytheaddress,thedatacode,thesynchronouscode,afterthecodesignallaunchesthroughwirelesslaunchmoduleFS1000A.ThelaunchmoduleFS1000AusestheASKwaymodulation,reducesthepowerloss,whendatasignalstoptheemissioncurrentreducestozero,thedatasignalandtheDFlaunchmoduleinputendmayusetheresistanceorthedirectconnection,butcannotusethecapacitivecoupling,otherwisetheDFlaunchmodulewillnotbeablethenormalwork.ThedatalevelshouldapproachtheDFdatamodulethepracticalworkvoltage,obtainsthehighmodulationeffect.ThereceivemodulemainlyconstitutesbywirelessreceivemodulePC-RHSAanddecodingchipPT2272[2].The14pinofdecodingchipPT2272andthereceivemodule'sdataoutputlookscarefullytheconnection,thusaddressmatchmayreceivethesignalwhichthemodulereceivestosendindecodingchipPT2272.Thedecodingchip'saddressendisconsistentwiththetransmissioncircuitPT2262addressend,withtheaimofimplementingthecontrol.TheMCUselectsAT89C51chip,connectsaccordingtothesmallestsystem[3],soonthe31pinofAT89C51ch