基于传感器阵列的电子鼻

,,,CH4COH2STC89C523SnO2GGAVC++6.0MatlabMatlabANNToolboxBPBPABSTRACTElectronicnosesystemisanelectronicdeviceofmodelingbiologicalolfactorysystembyusingelectricitytoanlysisandidentifymixtures.Asinglegassensorofgasresponseofnon-specificandspecifictothepreferredresponsecharacteristicsofgas,accordingtotheactualapplication,formapluralityofsinglegassensoroptimizationcombinationtoagassensorarrayandthegasisinhaledairchambercavity,inductedbythesensorarray.Usingmultidimensionalspacegasresponsepatternsofarray,thesensorwilltranslateinductionsignalintotheelectricalsignal,throughsignalprocessing,sendtothepatternrecognitionsystemtopatternrecognitionandtoutputanddisplaytherecognitionresult,toidentificatethegas.ThispaperdescribesthequantitativeanalysisoftheelectronicnosesystemappliedforCH4COandH2ofmixedgasesofdifferentconcentrationratio.STC89C52SCMiscontrolcore,integratedgassensorarraycomposedof3metaloxidesemiconductorbasedonGermanGGAseriessensorandthedesignofthesignalpretreatmentcircuitthePCsoftwaredevelopmentusingVC++6.0,usingthemixedprogrammingtechnology,embeddedMatlabengine,ImplementationofBPnetworkpatternrecognitionalgorithmusingartificialneuralnetworktoolboxfunctionofMatlab.Theelectronicnosesystemofgassensorarrayandpatternrecognitiontechnologytocombine,analysisandidentificationofmixedgascompositionandconcentrationwell.Thesystemalsousestheartificialneuralnetworkmethod,toeffectivelysolvethecrosssensitivityproblemofthetraditionalsinglegassensor,toimprovetheprecisionofgasdetection.Keywords:electronicnosegassensorarraysignalpretreatmentBPnetwork1..............................................................................................................01.1..................................................................01.2........................................01.2.1..............................................................01.2.2..............................................................11.2.3..................................................................11.3..................................................21.4........................................................22..........................................................................................42.1..................................................42.2............................................................52.2.1..........................................................52.2.2..........................................................52.2.3..............................................................62.3........................................................62.4..........................................................72.4.1................................................................72.4.2....................................................72.4.3................................................................82.5..............................................................93................................................................................113.1.........................................................113.2.......................................................113.2.1STC89C52...............................................................113.2.2...................................................................123.2.3...............................................................123.3...........................................133.3.1...........................................................133.3.2.........................................................143.3.3.........................................................153.4.......................................................153.4.1...................................................................163.4.2A/D................................................................163.5.....................................................174................................................................................184.1.................................................................184.2.......................................................194.3.......................................................204.4BP...............................................................224.4.1.......................................................................224.4.2BP................................................................224.5.......................................................244.5.1...................................................................244.5.2.............................................................244.5.3...................................................................245................................................................................................315.1.................................................................315.2...................................................31.................................................................................................................31..............................................................