JASO D902-1995 汽车电子设备的耐用性测试方法

JAPANESEAUTOMOBILESTANDARDJASOD902-95Durabilitytestingmethodsforautomotiveelectronicequipment1.ScopeThisstandardstipulatesthestandardizedtestingmethodsforevaluatingthedurabilityofautomotiveelectronicequipment(hereinafterreferredtoasequipment)usedwith12-Vor24-Vnominalvoltagepowersuppliesunderspecificambientconditions.RemarkThefollowingstandardsarequotedinthisstandard.JISC1102:Directactingindicatinganalogueelectricalmeasuringinstruments,andtheiraccessoriesJISD1601:VibrationtestingmethodsforautomobilepartsJISZ8703:StandardatmosphericconditionsfortestingJASOD001:Generalrulesofenvironmentaltestingmethodsforautomotiveelectronicequipment2.DefinitionsThedefinitionsofthemaintermsusedinthisstandardarelistedbelow.(1)Automotiveelectronicequipment:Thegeneraltermforautomotivecomponentswithastructureorconfigurationallowingmountingonamotorvehicle,includingelectronicsensors,controlunits(orcomputers),displays,andaudiolvisualsystems.(2)Transientvoltage:Atransientvoltageoccurringinthepowersupplycircuittoanelectricaldevicebeforeconditionsreturntonormalafterafluctuationhasoccurredintheelectricalcircuitsincorporatingthedevice,oravoltageoccurringinadevice'selectricalcircuitsduetoconnectionorinductioncausedbyhigh-tensioncables.3.TestcategoriesTestingiscategorizedasshowninTable1.Table1:TestcategoriesHigh-temperaturehigh-humidityelectricaltestI5.3TestcategoryTransientvoltageendurancetestThermalshockendurancetestVibrationendurancetestI5.4Testitemnumber5.15.24.Generalconditions4.1TestlocationconditionsUnlessotherwisespecified,theambientconditionsofthetestlocationaretobeconstantat20°C*I5°Cand65%220%humidity,asstipulatedinJISZ8703.4.2TestapparatusUnlessotherwisespecified,testapparatusesaretobeasfollows.(1)Ammeter:Aninstrumentwithaccuracyofclass0.5orbetter,asstipulatedin4.1(Tolerances)inJISC1102.(2)Voltmeter:Aninstrumentwithaccuracyofclass0.5orbetter,asstipulatedin4.1(Tolerances)inJISC1102.(3)Powersupplyunit:AunitthatprovidesastableDCpowersupply(abatteryorunitwithlowimpedancesimilartoaJASOD902-95battery),maybevariedfrom8Vto38V,andforwhichsupplyvoltagefluctuationsduetoequipmentoperationdonotexceedk0.3V.(4)Inputdevice:Asignalgeneratorforthetestcomponent,suchassensorsusedinthevehicle,oradevicewithsimilarcharacteristics.(5)Loaddevice:Apassivedeviceforthetestcomponent,suchasactuatorsusedinthevehicle,oradevicewithsimilarcharacteristics.Dummydevicesmaybeusediftheyhavenodirecteffectsonthetestresults.4.3TestcomponentsTestcomponentsaretobedevicesadjustedasspecifiedinthespecificationsmanual,andaretobetestedbeforehandasdescribedin4.5.Testcomponentsaretobethoseagreeduponbythedeliverysupervisors.4.4TestvoltageandsustentionUnlessotherwisespecified,thetestvoltageistobe14V(fora12-Vsystem)or28V(fora24-Vsystem).Thetestvoltageistobemonitoredandsustainedcorrectlyusingavoltmeter,asstipulatedin4.2(2).4.5NormalpowersupplyvoltagetestThevoltageistobeappliedafterconnectingthepowersupplyunit,inputdevice,andloaddevicetothetestcomponent,andtheequipmentcharacteristicsaretoberecordedforatleastthreedifferentvoltagesinarangefrom10Vto16V(fora12-Vsystem)or20Vto32V(fora24-Vsystem),includingthemaximumandminimumfortheapplicablerange.5.Testmethod5.1Transientvoltageendurancetest5.1.IObjectivesToevaluatedurabilityagainsttransientvoltagesgeneratedbytheoperationofotherelectricalorelectronicdevicesmountedinthevehicle.5.1.2TestapparatusIncludesequipmenttogeneratethetransientvoltagestipulatedinTable2(seeFigure2),powersupplyunit,andinputandloaddevices.5.1.3OperationThepowersupplyunitandinputandloaddevicesaretobeconnectedtothetestcomponentinthesameconfigurationasintheactualvehicle,andtheequipmenttogeneratethetransientvoltageistobeconnectedtothetestcomponenttoenableoperationduringthetest.Thetestcomponentistobetestedasdescribedin4.5,byapplyingandthenremovingthetransientvoltagestipulatedinTable2andrecordingtheresultantdevicecharacteristics.Table2:TransientvoltageendurancetestconditionsCategory12-Vsystem24-VsystemTesttypeTypeBTestconditionsB-IB-2Testcycles10000OooO10000VPV-80-260-320TypeETransientvoltagelocationPowersupplyterminalszPS60000200026000ts0.5-30R,s2880210Wave-formFig.1TransientvoltagegeneratingunitFig.2JASOD902-95Remark1:Componentspermanentlyconnectedtothepowersupplyvoltagearetobetestedsubjecttoagreementofthedeliverysupervisors.2:TypeBorEhere:ExponentiallyattenuatingnegativeelectrodetransientvoltagestipulatedinTable3ofJASOD001.V,:Maximumvalueoftransientvoltage.r:Attenuationtimeconstant(timerequiredforvoltagetoattenuateto36.8%ofmaximum)t:RepeatperiodR,:OutputimpedanceoftransientvoltagegeneratorFigure1:VoltagewaveformfortransientvoltageendurancetesttypeBandEPowersupply,ZIHOV*tRemark:ThetimetakentoreachthemaximumtransientvoltageV,from0Vmustnotexceed1psFigure2:VoltagegeneratorcircuitfortransientvoltageendurancetesttypeBandELinked--.-----------------------*------------------------------Inputdevlceco,$~~e,tLoaddeuce-+Repeating1oscillatorRelaydriveSinglel-7EB:CapacitorchargingpowersupplyEl:PowersupplyunitV:VoltmeterRemark1:Whentherelayisde-energized,S2ison,andS1switchestothelefttocharg