【英文标准名称】:Roadvehicles-Componenttestmethodsforelectricaldisturbancesfromnarrowbandradiatedelectromagneticenergy-Immunitytomagneticfields
【原文标准名称】:道路车辆.窄带辐射电磁能量的电干扰元部件试验方法.磁场抗扰性
【标准号】:BSISO11452-8-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-07-31
【实施或试行日期】:2007-07-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:元部件;电气测试;电磁的;电磁兼容性;电磁干扰;电子设备;电子装置;赫尔姆霍茨;抗扰性;影响量;干扰抑制;干扰;磁场;摩托车;窄带;辐射;道路车辆;测试;测试条件;运载工具
【英文主题词】:Components;Electricaltesting;Electromagnetic;Electromagneticcompatibility;Electromagneticinterferences;Electronicequipment;Electronically-operateddevices;Helmholtz;Immunity;Influencequantities;Interferencerejections;Interferences;Magneticfields;Motorvehicles;Narrowband;Radiation;Roadvehicles;Testing;Testingconditions;Vehicles
【摘要】:ThispartofISO11452specifiestestsfortheelectromagneticimmunityofelectroniccomponentsforpassengercarsandcommercialvehicles,regardlessofthepropulsionsystem(e.g.spark-ignitionengine,dieselengine,electricmotor),tomagneticfieldsgeneratedbypowertransmissionlinesandgeneratingstationsandsomepowerfulelectricalequipment,suchasmotors.Toperformthistest,thedeviceundertest(DUT)isexposedtoamagneticdisturbancefield.TheradiatingloopmethodcanbeappliedtosmallDUTsortolargerDUTsbypositioningthecoilinmultiplelocations.TheHelmholtzcoilissometimesusedasanalternativemethod.ThistechniqueislimitedbytherelationshipbetweenthesizeoftheDUTandthesizeofthecoils.TheelectromagneticdisturbancesconsideredinthispartofISO11452arelimitedtocontinuousnarrowbandelectromagneticfields.Immunitymeasurementsofcompletevehiclescangenerallyonlybecarriedoutbythevehiclemanufacturerforreasonsincludingthehighcostofanabsorber-linedshieldedenclosurepreservingthesecrecyofprototypesorthelargenumberofdifferentvehiclemodels.Consequently,forresearch,developmentandqualitycontrol,alaboratorymeasuringmethodisusedbythevehiclemanufacturerandequipmentsupplierstotestelectroniccomponents.ISO11452-1specifiesgeneraltestconditions,definitions,practicaluseandbasicprinciplesofthetestprocedure.
【中国标准分类号】:T36
【国际标准分类号】:33_100_20;43_040_10
【页数】:24P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforPlastics:DynamicMechanicalPropertiesMeltRheology
【原文标准名称】:塑料的标准试验方法:动力机械性能.熔体流变学
【标准号】:ASTMD4440-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:Dynamicmechanicalanalysis(DMA)--plastics;Flowandflowrate--thermoplastics;Frequencymeasurements;Meltindex;Polymers;Rheology/rheologicalproperties--plastics;Straintesting--plastics;Thermoplasticresins;Viscoelasticproperties;Viscosity--p
【摘要】:Thistestmethodprovidesasimplemeansofcharacterizingtheimportantrheologicalpropertiesandviscosityofthermoplasticpolymersusingverysmallamountsofmaterial(approximately25to50mmindiameterby1to3mminthickness...approximately3to5g).Datamaybeusedforqualitycontrol,researchanddevelopment,andestablishmentofoptimumprocessingconditions.Dynamicmechanicaltestingprovidesasensitivemethodfordeterminingmoltenpolymerpropertiesbymeasuringtheelasticandlossmoduliasafunctionoffrequency,strain,temperature,ortime.Plotsofviscosity,storage,andlossmoduli,andtandeltaasafunctionoftheaforementionedprocessparametersprovidegraphicalrepresentationindicativeofmolecularweight,molecularweightdistribution,effectsofchainbranching,andmelt-processabilityforspecifiedconditions.Valuesobtainedinthistestmethodcanbeusedtoassessthefollowing:Complexviscosityofthepolymermeltasafunctionofdynamicoscillation,Processingviscosity,minimumaswellaschangesinviscosityasafunctionofexperimentalparameters,Effectsofprocessingtreatment,Relativepolymerbehavioralproperties,includingviscosityanddamping,andEffectsofformulationadditivesthatmightaffectprocessabilityorperformance.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredintherelevantASTMmaterialsspecificationshalltakeprecedenceoverthosementionedinthetestmethod.IftherearenorelevantASTMmaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodoutlinestheuseofdynamicmechanicalinstrumentationindeterminingandreportingtherheologicalpropertiesofthermoplasticresinsandothertypesofmoltenpolymers.Itmaybeusedasamethodfordeterminingthecomplexviscosityandothersignificantviscoelasticcharacteristicsofsuchmaterialsasafunctionoffrequency,strainamplitude,temperature,andtime.Suchpropertiesmaybeinfluencedbyfillersandotheradditives.1.2Itincorporatesalaboratorytestmethodfordeterminingtherelevantrheologicalpropertiesofapolymermeltsubjectedtovariousoscillatorydeformationsonaninstrumentofthetypecommonlyreferredtoasamechanicalordynamicspectrometer.1.3Thistestmethodisintendedtoprovideameansofdeterminingtherheologicalpropertiesofmoltenpolymers,suchasthermoplasticsandthermoplasticelastomersoverarangeoftemperaturesbynonresonant,forced-vibrationtechniques.Plotsofmodulus,viscosity,andtandeltaasafunctionofdynamicoscillation(frequency),strainamplitude,temperature,andtimeareindicativeoftheviscoelasticpropertiesofamoltenpolymer.1.4Thistestmethodisvalidforawiderangeoffrequencies,typicallyfrom0.01to100Hz.1.5Thistestmethodisintendedforhomogenousandheterogeneousmoltenpolymericsystemsandcompositeformulationscontainingchemicaladditives,includingfillers,reinforcements,stabilizers,plasticizers,flameretardants,impactmodifiers,processingaids,andotherimportantchemicaladditivesoftenincorporatedintoapolymericsystemforspecificfunctionalproperties,andwhichcouldaffecttheprocessabilityandfunctionalperformance.Thesepolymericmaterialsystemshavemoltenviscositiestypicallylessthan106Pax00B7;s(107poise).1.6Apparentdiscrepanciesmayariseinresultsobtainedunderdifferingexperimentalconditions.Withoutchangingtheobserveddata,reportinginfull(asdescribedinthistestmethod)theconditionsunderwhicht......
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 夹具通用件压紧件 直角压块 |
| 发布日期： | 1994-10-31 |
| 实施日期： | 1995-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类：