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1、外文資料翻譯MovingObjectCountingwithanInfraredSenswkByKIChiKeungAbstractWirelessSenswk(WSN)hasbecomeahotresearchtopicrecently.GreatbenefitcanbegainedthroughthedeploymentoftheWSNoverawiderangeofapplicationscoveringthedomainsofc

2、ommercialmilitaryaswellasresidential.Inthisprojectwedesignacountingsystemwhichtrackspeoplewhopassthroughadetectingzoneaswellasthecrespondingmovingdirections.Suchasystemcanbedeployedintrafficcontrolresourcemanagementhuman

3、flowcontrol.OurdesignisbasedonourselfmadecosteffectiveInfraredSensingModuleboardwhichcooperateswithaWSN.ThedesignofoursystemincludesInfraredSensingModuledesignsensclusteringnodecommunicationsystemarchitecturedeployment.W

4、econductaseriesofexperimentstoevaluatethesystemperfmancewhichdemonstratestheefficiencyofourMovingObjectCountingsystem.Keywds:Infraredradiation，WirelessSensNode1.1IntroductiontoInfraredInfraredradiationisapartoftheelectro

5、magicradiationwithawavelengthlyingbetweenvisiblelightradiowaves.Infraredhavebewidelyusednowadaysincludingdatacommunicationsnightvisionobjecttrackingsoon.Peoplecommonlyuseinfraredindatacommunicationsinceitiseasilygenerate

6、donlysufferslittlefromelectromagicinterference.TaketheTVremotecontrolasanexamplewhichcanbefoundineveryoneshome.Theinfraredremotecontrolsystemsuseinfraredlightemittingdiodes(LEDs)tosendoutanIR(infrared)signalwhenthebutton

7、ispushed.Adifferentpatternofpulsesindicatesthecrespondingbuttonbeingpushed.ToallowthecontrolofmultipleappliancessuchasaTVVCRcableboxcentsdependingonthesizeofthesenswkthecomplexityrequirementoftheindividualsensnodes.Thesi

8、zecostareconstrainedbysensnodestherefehaveresultincrespondinglimitationsonavailableinputssuchasenergymemycomputationalspeedbwidth.Thedevelopmentofwirelesssenswks(WSN)wasiginallymotivatedbymilitaryapplicationssuchasbattle

9、fieldsurveillance.Duetotheadvancementinmicroelectronicmechanicalsystemtechnology(MEMS)embeddedmicroprocessswirelesswkingtheWSNcanbebenefitedinmanycivilianapplicationareasincludinghabitatmonitinghealthcareapplicationshome

10、automation.1.3TypesofWirelessSenswksWirelesssenswknodesaretypicallylesscomplexthangeneralpurposeoperatingsystemsbothbecauseofthespecialrequirementsofsenswkapplicationstheresourceconstraintsinsenswkhardwareplatfms.Theoper

11、atingsystemdoesnotneedtoincludesupptfuserinterfaces.Furthermetheresourceconstraintsintermsofmemymemymappinghardwaresupptmakemechanismssuchasvirtualmemyeitherunnecessaryimpossibletoimplement.TinyOS[TinyOS]ispossiblythefir

12、stoperatingsystemspecificallydesignedfwirelesssenswks.UnlikemostotheroperatingsystemsTinyOSisbasedonaneventdrivenprogrammingmodelinsteadofmultithreading.TinyOSprogramsarecomposedintoeventhlerstaskswithruntocompletionsema

13、ntics.WhenanexternaleventoccurssuchasanincomingdatapacketasensreadingTinyOScallstheappropriateeventhlertohletheevent.TheTinyOSsystemprogramsarebothwritteninaspecialprogramminglanguagecallednesC[nesC]whichisanextensiontot

14、heCprogramminglanguage.NesCisdesignedtodetectraceconditionsbetweentaskseventhlers.TherearealsooperatingsystemsthatallowprogramminginC.ExamplesofsuchoperatingsystemsincludeContiki[Contiki]MANTIS.Contikiisdesignedtosupptlo

15、adingmodulesoverthewksupptsruntimeloadingofstardELFfiles.TheContikikerneliseventdrivenlikeTinyOSbutthesystemsupptsmultithreadingonaperapplicationbasis.UnliketheeventdrivenContikikerneltheMANTISkernelisbasedonpreemptivemu

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