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外文翻译--新型指纹识别传感器的应用分析.doc

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外文翻译--新型指纹识别传感器的应用分析.doc

4050字数外文翻译NewfingerprintidentificationsensorapplicationsanalysisAbdtractFingerprintrecognitiontechnologyasasophisticatedidentificationmethodshavebeenwidelyusedinvariousindustries.Thecorecomponentsofthetechnologyusedforsensors,thepaperintroducedfingerprintrecognitiontechnologysensorsintheapplication.KeywordsFingerprintidentificationSensorsApplicationsContacttypethesensorwithdelimitsthescratchingsensoristwokindofnewsolidstatesfingerprintssensor,allisthroughintouchesintheprocesstheelectriccapacitychangetocarryoninformationgathering.Thisarticlehascarriedonthemultianalysistotwokindofsensorsprinciplesofworkandthecharacteristic,andtheintroductionintheInternetsafeauthentication,theautomobiledoesnothavethekeytoenterthesystemandsoontheapplication.AtpresentinthemarkethastwokindofsolidstatesfingerprintssensorThefirstkindisthesingletimeoftouchingsensor,requeststhefingertocarryonreliabletouchinginthefingerprintgatheringareaThesecondkindthenneedstousethefingertoscratchinthesensorsurface,thesensorcangathersetofspecificdata,thencarriesonthefastanalysisandtheauthentication.Thesetwokindoffingerprintssensorwillobtainthemoreandmorewidespreadapplication.TheabovetwokindofsensorsprincipleofworkisWheninthefingerprintbulgepartiallyputsinontheelectriccapacitypictureelementelectrode,theelectriccapacitycanhavetheincrease,increasestheelectriccapacitythroughtheexaminationtocarryonthedataacquisition.Inthesensorpicturepictureelementis45squaresmicrons,thegapis50microns,theelectriccapacitypictureelementarrayresolutionishigherthan500dpislightly.ThiskindofsensorbasedononekindofstandardlistpolycrystallinesiliconthreemetalsCMOScraft,anduses0.5micronscrafttocarryonthedesign.Themetalinterlocksthethirdconstitutionelectriccapacitypictureelementlevel,ismadeandiscoveringnitridedsiliconbythetitaniumnitrides,thicknessisonly7,000Emmy.Thiskindofrigidmetalelectrodewithantirubsextremelysolidspreadsthesensorwhichthecoatingcombinationformstobedurable,theservicelifemayamounttoverymanyyears.1.FingerprintexaminationHumanitysfingerprintbythecloseneighboringconcaveconvextraceconstitution,throughlightstheusestandardreferencedischargingcurrenttoeachpictureelement,thenmayexaminetothefingerprinttracecondition.Eachpictureelementinadvancechargesfirsttosomereferencevoltage,thenbyreferenceelectriccurrentelectricdischarge.OnundertheelectriccapacityanodethevoltagechangerateifonelectriccapacitybecomestheproportionalrelationshipIrefCdv/DIsinthefingerprintunderthebulgepictureelementelectriccapacityhightodischargeslowly,butisinthefingerprintunderthedepressionpictureelementelectriccapacitytobelowdischargesquickly.ThiskindofdifferentdischargeratiomaymaintainS/throughthesamplingHtheelectriccircuitexaminesandtransforms8outputs,thisexaminationmethodhasthehighsensitivitytothefingerprintbulgeandtheindentation,andmayformtheextremelygoodprimitivefingerprintimage.Processshowswhichthroughchart1,usesthecomplexsoftwarealgorithmtobepossibletocarryonthefingerprintrecognition.Thiskindofsoftwaregatheringprimitivefingerprintimage,andwithdrawsthepictorialinformationdigitizationdetailtemplate,thencarriesonthetest,determinedwithdrawswhetherthedetailtemplatedoestallywiththereferencetemplate.2.ComparedwithprocessContacttypethesensorwithdelimitsthescratchingsensorthesizeandthecostisalldissimilar.Thecontactpilotisbig,usualeffectivecontactfacefor1515mm,butrapidlygathersthebiggestfingerprintorthethumbfingerprint.Thiskindofsensoriseasytouse,andmaytheentirefingerprintimageby500dpiautomaticfingerprintrecognitionstandardtheprecisioncarriesonthespeedytransmission.Atpresentthesesensorshavecompletedthedesign,andusesintheUSgovernmentapparatusandthepolicestationcarriesonthefingerprintrecognition.NearfuturealsograduallywilluseinautomobileShanChushinothavingthekeytoenterthesystem,aswellasinemergingnationalsecurityapplication.Thiskindofsensor300linetheminiaturemetalelectrodeiscomposedby256row,eachrowconnectstopairofS/OnHelectriccircuit.Fingerprintimagesuccessionbyalineofgathering,eachmetalelectrodetakestheelectriccapacityextremely,withitcontactfingertheniselectriccapacityanotherextremely.Hasadeactivatedlevelinthecomponentsurface,takestwoelectriccapacitiesinterelectrodesthedielectricsheet.Putsinonthesensorwhenthefinger,inthefingerprintbulgeandtheindentationcanhavethedifferentcapacitancevalueinthearray,andtheconstitutionusesinanentireimagewhichauthenticates.Delimitsthescratchingsensorisonekindofnewfingerprintgatheringcomponent,therequestuserhasdelimitedthefingeronthecomponent.DelimitsthescratchingsensorthemeritisthesizesmallforexampleFujitsusMBF300sizeonlyis3.613.3mm2andthecostislow.Thesecomponentsmainlyuseinthemobileequipmentinsertingthetypesaferecognitionapplication,likehandsetandPDA.Thepreciseimagereconstructionsoftwarebyapproaches2,000/Asecondspeedfastgathersmanyimagesfromthesensor,andorganizeseachframedatadetailtotogether.3.InformationandauthenticationTheportablelowcostfingerprintrecognitiontechnologyiswithoutadoubtprofoundtoourlifesignificance.Forexample,thenextpolicemightsucceedintheimperialcivilserviceexaminationstheareainacrimetointerceptasuspect,willrequestittoprovidethefingerprintbutisnottheIDcardortheautomobiledrivinglicense.Thispersonthenhis/herrighthandfirst,twoorthethirdfingerputsinwiththewirelessPDAconnectedsensoron,mightrapidlycarriesonthesuspectandthebeforecrimerecordingthecontrastconfirmation.Thiskindofrecognitiontechnologyregardingthehandsetuserwhichrobsisalsohadtheadvantage.Handsetwhenrequeststheuserthroughafastauthenticationprocess,theusertodelimithis/herfingerthesensor,ifthroughauthenticationthenisauthorizedusesthehandseteachfunction.Ifisauthorizedtheuser,thehandsetthencontinuestomaintainlocksin.Ifseveralauthenticationisunabletopasscontinuously,theninthehandopportunitydeletionmemoryessentialinformationthen.Ininpronunciationmailapplication,afterallocatesapronunciationmailnumber,theuseronlymustdelimitthefingerthesensorthentobepossibletomakethesystemrecognition.Afterhadthefingerprintrecognition,thendoesnotneedtousethemailboxpasswordortheindividualidentificationnumber.Inthenextautomobileapplication,theusermightinputthefamilymemberfingerprintsample,willbeabletodriveafterthewarningpower.RegistrationprocessextremelysimpleEachauthorizeddrivingmemberputsinhis/herfingeronthesensor,andcarriesonautomobileeachkindofparameteraccordingtoindividualhobbytheestablishment,thenstorestheseestablishmentsCheZaiinthecomputermemory.Whenthedriverenterstheautomobile,he/Sheputsinthefingeronthesensor,startrecognitionprocess.Nottoasecond,thecomputerexaminestothefingerprinttemplateandthememorytemplatewillcarryonthecomparison,andestablishesthecorrelationestablishmentwhichtallieswiththedriver.Thefingerprinttemplateandthematchsoftwarepreservationinsertsinthetypemoduleinautomobile.Whenthefingerprintmatchessuccessfully,theautomobilethenpresseshasprogrammedthehypothesisinternalparametertocontroltherearviewmirror,intheautomobilechair,thewirelessbasedepotaswellasthevehicletheairenvironment.Inaddition,butalsomaycontrolthedrivingspeed,ifthedriverisonlytenyearoldchildren,thenratelimitationineachhour55kilometers.Thesefunctionsrealizationshaveextremelymanyuses.4.CausesthemobileinternedtoturnonsafelyAlongwiththesemiconductorandthesoftwaretechnologydevelopment,thehandsetgraduallywillbecomeonekindtobepossibletogainindividualanytimeandanywhereandthecompanydatamobiletermination,thereforeneedstoguaranteetheuservisitthesecurity,bypreventedhasnotbeenauthorizedthevisit.Theoriginallawenforcementagencyusefingerprintrecognitionwayonlysavesinthefingerprintsomedatabutthenonentirephantom,thus,thebiologicalfingerprintsweepingsystemmoreeffective,isreliable.ThiskindofexaminationalltreatingprocessesdivideequallyforfollowingseveralstepsFirstisgathersthestage,thecomponentgatheringfingerbiologysampleThentheuseestablishesinadvancethemathematicalformulaorthealgorithmwithdrawthedatafromthesamplewhichitisinsolepossessionof,andtransformsitatemplateTheregistrationauthenticationprocedurehitsthemarkfromafingerprint3040characteristicwithdrawssevencharacteristicsmatchesspottocarryontheconfirmationatleast,includingconstitutessomefingerprintdetailthetracebifurcationandtheendpoint,andisdefinedthecharacteristicpointthedistance.Whencarriesontheregistration,theinformationcodeissaved,willtakethenextuserauthenticationthereferencetemplate.Whentheuserentersthesystem,he/Shehasdelimitedthefingerthesensorregion,gainsthescenescanningtemplateandthereferencetemplatecarryonthecomparison.Theentireprocesscompletesin1or2seconds.Throughthecomparison,thesystemcandeterminewhetherthisscenescanningtemplatehascontainedtheenoughbiologicaldatawhichtallieswiththereferencetemplate,andjudgmenttwowhetherdomatch.Ifdoesnotmatch,thentheauthenticationdefeat,waitedforthenexttimewilldistinguish.Thiskindoffingerprintexaminationsystemperformanceisveryhigh,makesthewrongjudgmenttotheeffectivefingerprinttheprobabilityto

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