NF C72-310-1993 "顶端闪光/触摸闪光"摄影闪光灯阵列
作者:标准资料网 时间:2024-05-14 09:52:21 浏览:9344
来源:标准资料网
【英文标准名称】:"Topflash/flipflash"photographicflashlamparray.
【原文标准名称】:"顶端闪光/触摸闪光"摄影闪光灯阵列
【标准号】:NFC72-310-1993
【标准状态】:现行
【国别】:法国
【发布日期】:1993-09-01
【实施或试行日期】:1993-09-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:机械试验;摄影技术;照明设备;闪光设备;使用;尺寸;电气工程;规范(验收);照明系统;普通照明灯;电灯;照相闪光灯;灯;闪光灯;系统;电子闪光装置;摄影
【英文主题词】:
【摘要】:
【中国标准分类号】:N46
【国际标准分类号】:37_040_10
【页数】:11P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforMagneticPropertiesofHigh-CoercivityPermanentMagnetMaterialsUsingHysteresigraphs
【原文标准名称】:使用磁滞曲线记录仪测试高矫顽磁力永磁材料磁性的标准试验方法
【标准号】:ASTMA977/A977M-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:A06.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coercivefieldstrength;coercivity;hysteresigraph;induction;magnetic;magneticmaterial;magnetictest;permanentmagnets;permeameter;remanence
【摘要】:1.1Thistestmethodcovershowtodeterminethemagneticcharacteristicsofmagneticallyhardmaterials(permanentmagnets),particularlytheirinitialmagnetization,demagnetization,andrecoilcurves,andsuchquantitiesastheresidualinduction,coercivefieldstrength,kneefield,energyproduct,andrecoilpermeability.Thistestmethodissuitableforallmaterialsprocessedintobulkmagnetsbyanycommonfabricationtechnique(casting,sintering,rolling,molding,andsoforth),butnotforthinfilmsorformagnetsthatareverysmallorofunusualshape.Uniformityofcomposition,structure,andpropertiesthroughoutthemagnetvolumeisnecessarytoobtainrepeatableresults.Particularattentionispaidtotheproblemsposedbymodernmaterialscombiningveryhighcoercivitywithhighsaturationinduction,suchastherare-earthmagnets,forwhicholdertestmethods(seeTestMethodA341)areunsuitable.AnapplicableinternationalstandardisIECPublication60404-5.1.2Themagneticsystem(circuit)inadeviceormachinegenerallycomprisesflux-conductingandnonmagneticstructuralmemberswithairgapsinadditiontothepermanentmagnet.Thesystembehaviordependsonpropertiesandgeometryofallthesecomponentsandontheoperatingtemperature.Thistestmethoddescribesonlyhowtomeasurethepropertiesofthepermanentmagnetmaterial.Thebasictestmethodincorporatesthemagneticspecimeninamagneticcircuitwithaclosedfluxpath.Testmethodsusingringsamplesorframescomposedentirelyofthemagneticmaterialtobecharacterized,ascommonlyusedformagneticallysoftmaterials,arenotapplicabletopermanentmagnets.1.3ThistestmethodshallbeusedinconjunctionwithPracticeA34/A34M.1.4Thevaluesandequationsstatedincustomary(cgs-emuorinch-pound)orSIunitsaretoberegardedseparatelyasstandard.Withinthistestmethod,SIunitsareshowninbracketsexceptforthesectionsconcerningcalculationswherethereareseparatesectionsfortherespectiveunitsystems.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththistestmethod.1.5Thenamesandsymbolsofmagneticquantitiesusedinthistestmethod,summarizedinTable1,arethosegenerallyacceptedbytheindustry.1.6ThistestmethodisusefulformagnetmaterialshavingHcivaluesbetweenabout100Oeand35kOe[8kA/mand2.8MA/m],andBrvaluesintheapproximaterangefrom500Gto20kG[50mTto2T].High-coercivityrare-earthmagnettestspecimensmayrequiremuchhighermagnetizingfieldsthaniron-coreelectromagnetscanproduce.Suchsamplesmustbepremagnetizedexternallyandtransferredintothemeasuringyoke.Typicalvaluesofthemagnetizingfields,Hmag,requiredforsaturatingmagnetmaterialsareshowninTableA2.1.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H21
【国际标准分类号】:29_030
【页数】:12P.;A4
【正文语种】:
【英文标准名称】:Communicationnetworksandsystemsforpowerutilityautomation-Part9-2:Specificcommunicationservicemapping(SCSM)-SampledvaluesoverISO/IEC8802-3
【原文标准名称】:公用电力事业自动化的通信网络和系统.第9-2部分:专用通信服务映射(SCSM)通过ISO/IEC8802-3的抽样值
【标准号】:IEC61850-9-2-2011
【标准状态】:现行
【国别】:国际
【发布日期】:2011-09
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC57
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Circuitnetworks;Commandsystems;Communication;Datacommunication;Datatransfer;Definitions;Electricpowersystems;Electricalengineering;Electricalprotectionequipment;Electronicequipment;Energysupply;Links;Mapping;Powersystemmanagement;Signaltransmission;Stations;Substation;Telecommunications;Transmission
【摘要】:
【中国标准分类号】:F21
【国际标准分类号】:33_040_40;33_200
【页数】:65P;A4
【正文语种】:英语
