外文翻譯--新型指紋識(shí)別傳感器的應(yīng)用分析.doc

4050字?jǐn)?shù)外文翻譯NewfingerprintidentificationsensorapplicationsanalysisAbdtractFingerprintrecognitiontechnologyasasophisticatedidentificationmethodshavebeenwidelyusedinvariousindustries.Thecorecomponentsofthetechnologyusedforsensors,thepaperintroducedfingerprintrecognitiontechnologysensorsintheapplication.KeywordsFingerprintidentificationSensorsApplicationsContacttypethesensorwithdelimitsthescratchingsensoristwokindofnewsolidstatesfingerprintssensor,allisthroughintouchesintheprocesstheelectriccapacitychangetocarryoninformationgathering.Thisarticlehascarriedonthemultianalysistotwokindofsensorsprinciplesofworkandthecharacteristic,andtheintroductionintheInternetsafeauthentication,theautomobiledoesnothavethekeytoenterthesystemandsoontheapplication.Atpresentinthemarkethastwokindofsolidstatesfingerprintssensor:Thefirstkindisthesingletimeoftouchingsensor,requeststhefingertocarryonreliabletouchinginthefingerprintgatheringarea；Thesecondkindthenneedstousethefingertoscratchinthesensorsurface,thesensorcangathersetofspecificdata,thencarriesonthefastanalysisandtheauthentication.Thesetwokindoffingerprintssensorwillobtainthemoreandmorewidespreadapplication.Theabovetwokindofsensorsprincipleofworkis:Wheninthefingerprintbulgepartiallyputsinontheelectriccapacitypictureelementelectrode,theelectriccapacitycanhavetheincrease,increasestheelectriccapacitythroughtheexaminationtocarryonthedataacquisition.Inthesensorpicturepictureelementis45squaresmicrons,thegapis50microns,theelectriccapacitypictureelementarrayresolutionishigherthan500dpislightly.Thiskindofsensorbasedononekindofstandardlist-polycrystallinesiliconthreemetalsCMOScraft,anduses0.5micronscrafttocarryonthedesign.Themetalinterlocksthethirdconstitutionelectriccapacitypictureelementlevel,ismadeandiscoveringnitridedsiliconbythetitaniumnitrides,thicknessisonly7,000Emmy.Thiskindofrigidmetalelectrodewithanti-rubsextremelysolidspreadsthesensorwhichthecoatingcombinationformstobedurable,theservicelifemayamounttoverymanyyears.1.FingerprintexaminationHumanitysfingerprintbythecloseneighboringconcave-convextraceconstitution,throughlightstheusestandardreferencedischargingcurrenttoeachpictureelement,thenmayexaminetothefingerprinttracecondition.Eachpictureelementinadvancechargesfirsttosomereferencevoltage,thenbyreferenceelectriccurrentelectricdischarge.Onundertheelectriccapacityanodethevoltagechangerateifonelectriccapacitybecomestheproportionalrelationship:Iref=Cdv/DIsinthefingerprintunderthebulgepictureelement(electriccapacityhigh)todischargeslowly,butisinthefingerprintunderthedepressionpictureelement(electriccapacitytobelow)dischargesquickly.Thiskindofdifferentdischargeratiomaymaintain(S/throughthesamplingH)theelectriccircuitexaminesandtransforms8outputs,thisexaminationmethodhasthehighsensitivitytothefingerprintbulgeandtheindentation,andmayformtheextremelygoodprimitivefingerprintimage.Processshowswhichthroughchart1,usesthecomplexsoftwarealgorithmtobepossibletocarryonthefingerprintrecognition.Thiskindofsoftwaregatheringprimitivefingerprintimage,andwithdrawsthepictorialinformationdigitizationdetailtemplate,thencarriesonthetest,determinedwithdrawswhetherthedetailtemplatedoestallywiththereferencetemplate.2.ComparedwithprocessContacttypethesensorwithdelimitsthescratchingsensorthesizeandthecostisalldissimilar.Thecontactpilotisbig,usualeffectivecontactfacefor1515mm,butrapidlygathersthebiggestfingerprintorthethumbfingerprint.Thiskindofsensoriseasytouse,andmaytheentirefingerprintimageby500dpi(automaticfingerprintrecognitionstandard)theprecisioncarriesonthespeedytransmission.Atpresentthesesensorshavecompletedthedesign,andusesintheUSgovernmentapparatusandthepolicestationcarriesonthefingerprintrecognition.NearfuturealsograduallywilluseinautomobileShanChushinothavingthekeytoenterthesystem,aswellasinemergingnationalsecurityapplication.Thiskindofsensor300(line)theminiaturemetalelectrodeiscomposedby256(row),eachrowconnectstopairofS/OnHelectriccircuit.Fingerprintimagesuccessionbyalineofgathering,eachmetalelectrodetakestheelectriccapacityextremely,withitcontactfingertheniselectriccapacityanotherextremely.Hasadeactivatedlevelinthecomponentsurface,takestwoelectriccapacitiesinterelectrodesthedielectricsheet.Putsinonthesensorwhenthefinger,inthefingerprintbulgeandtheindentationcanhavethedifferentcapacitancevalueinthearray,andtheconstitutionusesinanentireimagewhichauthenticates.Delimitsthescratchingsensorisonekindofnewfingerprintgatheringcomponent,therequestuserhasdelimitedthefingeronthecomponent.Delimitsthescratchingsensorthemeritisthesizesmall(forexampleFujitsusMBF300sizeonlyis3.613.3mm2)andthecostislow.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.Registrationprocessextremelysimple:Eachauthorizeddrivingmemberputsinhis/herfingeronthesensor,andcarriesonautomobileeachkindofparameteraccordingtoindividualhobbytheestablishment,thenstorestheseestablishmentsCheZaiinthecomputermemory.Whenthedriverenterstheautomobile,he/Sheputsinthefingeronthesensor,startrecognitionprocess.Nottoasecond,thecomputerexaminestothefingerprinttemplateandthememorytemplatewillcarryonthecomparison,andestablishesthecorrelationestablishmentwhichtallieswiththedriver.Thefingerprinttemplateandthematchsoftwarepreservationinsertsinthetypemoduleinautomobile.Whenthefingerprintmatchessuccessfully,theautomobilethenpresseshasprogrammedthehypothesisinternalparametertocontroltherearviewmirror,intheautomobilechair,thewirelessbasedepotaswellasthevehicletheairenvironment.Inaddition,butalsomaycontrolthedrivingspeed,ifthedriverisonlytenyear-oldchildren,thenratelimitationineachhour55kilometers.Thesefunctionsrealizationshaveextremelymanyuses.4.CausesthemobileinternedtoturnonsafelyAlongwiththesemiconductorandthesoftwaretechnologydevelopment,thehandsetgraduallywillbecomeonekindtobepossibletogainindividualanytimeandanywhereandthecompanydatamobiletermination,thereforeneedstoguaranteetheuservisitthesecurity,bypreventedhasnotbeenauthorizedthevisit.Theoriginallawenforcementagencyusefingerprintrecognitionwayonlysavesinthefingerprintsomedatabutthenon-entirephantom,thus,thebiologicalfingerprintsweepingsystemmoreeffective,isreliable.Thiskindofexaminationalltreatingprocessesdivideequallyforfollowingseveralsteps:Firstisgathersthestage,thecomponentgatheringfingerbiologysample；Thentheuseestablishesinadvancethemathematicalformulaorthealgorithmwithdrawthedatafromthesamplewhichitisinsolepossessionof,andtransformsitatemplate；Theregistrationauthenticationprocedurehitsthemarkfromafingerprint3040characteristicwithdrawssevencharacteristicsmatchesspottocarryontheconfirmationatleast,includingconstitutessomefingerprintdetailthetracebifurcationandtheendpoint,andisdefinedthecharacteristicpointthedistance.Whencarriesontheregistration,theinformationcodeissaved,willtakethenextuserauthenticationthereferencetemplate.Whentheuserentersthesystem,he/Shehasdelimitedthefingerthesensorregion,gainsthescenescanningtemplateandthereferencetemplatecarryonthecomparison.Theentireprocesscompletesin1or2seconds.Throughthecomparison,thesystemcandeterminewhetherthisscenescanningtemplatehascontainedtheenoughbiologicaldatawhichtallieswiththereferencetemplate,andjudgmenttwowhetherdomatch.Ifdoesnotmatch,thentheauthenticationdefeat,waitedforthenexttimewilldistinguish.Thiskindoffingerprintexaminationsystemperformanceisveryhigh,makesthewrongjudgmenttotheeffectivefingerprinttheprobabilityto