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15220056JOURNALOFTIANJINUNIVERSITYOFTECHNOLOGYANDEDUCATIONVol.15No.2Jun.2005P30031,2(1.,300222;2.,300072):OddballP300,EEG,P300BCI,P300,BCI,P300BCI:;P300;:TP334.7:A:167321018(2005)0220005205StudyontheP3002basedbraincomputerinterfaceZHAOLi1,WANBai2kun2(1.DepartmentofAatomation,TianjinUniversityofTechnologyandEducation,Tianjin300222,China;2.CollegeofPrecisionInstrumentandOpto2ElectronicsEngineering,TianjinUniversity,Tianjin300072,China)Abstract:Abrain2computerinterface(BCI)isacommunicationsystemthatdoesnotdependonthebrainsnormaloutputpathwaysofperipheralnervesandmuscles.Intheresearch,EEGsignalacquisitionsystemisbuiltbasedontheLabVIEWwhichisthebasisoftheonlineBCIssystem.TheP300evokedpotentialsisdetec2tedontheacquisitionsystembytheOddballstimulateprogramandrealizetheprimarystageP3002basedBCIssystem.ThepaperpresentstheanalyticalmethodofWaveletTransform(WT)forthepreprocessingofEEGac2quiredfromtheacquisitionsystem.ItisimportationforonlineBCIssystem.Keywords:brain2computerinterface(BCI);P300;signalprocessing2(braincomputerinterfaces,BCI)1929HansBerger[1](electroencephalogram,EEG),BCI10,BCI,,(ALSLouGehrig),200,[25],,3:2005-05-08.:(LB20050506).:(1962),,,,.:;;,EEGBCI,,,,,,BCI,,BCI,BCI,,11.11947Dowson(EvokedPotentials,EP)1951Dawson,(averageevokedpotentials,AEP),(eventrelatedpotentialsERP)[6]P300ERP,,ERPEPERP,P300Sutton1965P3003P3,P3300ms,P300P300Oddball[7],:(850Þ0),;(150Þ0),,300ms,P300P300P300,P300,(Fz,Cz,Pz,Oz)P300(Pz),(Cz),ERP210V,,ERP,,EEGERP,ERPERP50HzERP,1.21.2.1P300Oddball11P300,OddballOddball66,,,66,,,,,,16.70Þ0,83.30Þ0P300,P300,,,620056,P30010(6,4),22,OddballEEG,EEG,P3001.2.2(NI)6024E,LabVIEW(labora2toryvirtualinstrumentengineeringworkbench,),,RMS-DCPzCzFz,,/,168Hz22.1P300,,,[8]245245P300,,P300,[9]P300,P300,P300300ms,P300700msP3000.320V[9]P300(Pz),(Cz),CzP300PzFz,2.280,,,,[1015]:(),,,,,334Pz458,,,,,,,34(f),454(g)8,(h)8,45,8P300,BCIPzCzFz,3P300,,,7152:P3004Pz8200563(1)EEG,,,(2)P300BCI,,(3)P300OddballP300,,,P300,(4),,,,,BCI,,:BCI;,,;;;;,10,BCI,,:[1]DamperRI,BurnettJW,GrayPW,etal.Hand2heldtextto2speechdeviceforthenon2vocaldisabled[J].BiomedEng,1987,(9):332340.[2]FickeRC.Digestofdataonpersonswithdisabilities[J].DC:USDepartmentofEducation,NationalInstituteonDisa2bilityandRehabilitationResearch,1991.[3]NeidermeyerE.Electroencephalography:BasicPrinciples,ClinicalApplicationsandRelatedFields[M].Baltimore:1999.[4]MurrayC,LopezAD.TheGlobalBurdenofDisease:AComprehensiveAssessmentofMortalityandDisabilityFromDiseases,Injuries,andRiskFactorsin1990Projectedto2020[summary][M].Boston:HarvardUniversityPress,1996.[5]CarterGT.Rehabilitationmanagementinneuromusculardisease[J].NeurolRehabil,1997,(11):6980.[6],.[M].:,2002.[7]DonchinE,KarisD,BashoreTR,etal.CognitivePsycho2physiologyandNumanInformationProcessing[A].Psycho2physiology:SystemProcessesandApplications[C].NewYork:GuilfordPress,1986.244267.[8],.[M].:,1997.[9]LauerRT.Applicationsofcorticalsignalstoneuroprostheticcontrol:Acriticalreview[J].IEEETransactionsonRehabi2litionEngineering,2000,(8):205208.[10],,.[J].,2001,18(2):256259.[11],,.[J].,2000,26(4):914.[12].[J].,1997,17(4):712.[13],,.[J].,1997,13(3):457461.[14],,.[J].,2000,(4):5759.[15],,.[J].,1999,14(2):183186.9152:P300