【英文标准名称】:StandardGuideforTestingMaterialsforAerospacePlasticTransparentEnclosures
【原文标准名称】:航空航天塑料透明外壳用试验材料的标准规范
【标准号】:ASTMF790-2008
【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】:F07.08
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:abrasion;acrylic;adhesion;aerospace;bonding;electrical;enclosures;environmental;impact;interlayers;materials;mechanical;optical;physical;plastic;polycarbonate;properties;thermal;transparent;Acrylicplastics;Aerospacetra
【摘要】:Thisguideisintendedforusebymaterialsuppliers,aircrafttransparentenclosurefabricators,air-framemanufacturers,governmentagencies,andothersthatmaybecomeinvolvedinthetestingoftransparencycomponents.Thesetestmethodsprovidedataonbothindividualmaterialsandmaterialcombinationscommonlyutilizedinthefabricationsofaerospacetransparentenclosurescomprisedofmonolithicplastic,coatedmonolithicplasticorlaminatedconstructionscontainingplastics.Primarypropertiesandtheirlongtermstabilityarecriticaltotheperformanceofaerospacetransparentenclosures.Propertymeasurementtestsdefineas-manufacturedmaterialpropertiesofthesematerials.Agingproceduresprovideforexposureofpartsorrepresentativesectionstoenvironmentsthatmayinducechangesinmaterialpropertiesasdeterminedinpropertymeasurementtests.Propertymeasurementtestsperformedbeforeandafteragingexposureprovideameansofestimatingthepotentialusablelifespanofatransparencyortocomparethedurabilityofonematerialwithanother.Whenemployingthesetestmethodsforcomparisonofmaterialsforweatheringeffectstheusershouldbeawarethatthemanyfactorsinfluencingdegradationduetoweatheringvaryfromonelocationtoanother.Fordirectweatheringcomparisons,allmaterial(s)shouldundergoexposureconditionsandpropertymeasurementstestingatthesametime.Thetestmethodslistedincludethoseconsideredcriticaltotheperformanceofaircrafttransparentenclosures.Othertestmethodstoevaluatematerialsmayalsobeperformed.Additionaltestmethodsareinpreparationandwillbeincorporated.Theuserisadvisedtoemploythelatestrevisionofanytestmethod.Thedominantcomponentofalltransparentenclosuresisone,ormore,rigidtransparentsheet(s).Thesheet(s)mustpermitthenecessaryvisibilitywhileprovidingstructuralintegrityandprotectingtheaircraftinteriorfromexternalenvironmentsasrequiredbythespecificaircraftdesign.Initsmostsimpleform,therigidtransparentsheetmaybetheonlycomponentofatransparentenclosure.Whenmorethanonerigidtransparentsheetisemployed,thesheetsarelaminatedwithacontrolledthicknesswitheitheranairgaporwithatransparentadhesiveknownasaninterlayer.Transparentenclosuredesignsmayusemultiplerigidtransparentsheetstotakeadvantageofspecificpropertiesofdifferentmaterials.Inthisinstance,therewillbefunctionsrequiredofoneofthesheetsbutnottheother.Thetestmethods,practicesandguideslistedareasummaryoftheavailabletestmethodsapplicabletoplastictransparentenclosures.Theyarepresentedinthisformattosimplifythesearchandtoenabletheusertodetermineifamethodapplicabletohisrequirementsisavailable.1.1Thisguideisintendedtosummarizethestandardtestmethodsavailableonindividualandcompositematerialsutilizedinfabricationofaerospaceplastictransparentenclosures.Assuch,itisintendedtospecificallyincludetransparentthermoplastics,transparentelastomers,andreinforcedplastics,whetherthermoplasticorthermosetting.1.2ThisguideisintendedasanaidinthesearchfortestmethodspertinenttoAerospacePlasticTransparentEnclosures.Itshouldbeunderstoodthatallmethodslistedmaynotapplytoallenclosures.1.3ThestandardsincludedrefertothepropertiesoraspectslistedinTable1.Thepropertiesoraspectsarelistedinalphabeticalorderandthedescriptionsusedareintendedtofacilitatethesearch.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddetermi......
【中国标准分类号】:V13
【国际标准分类号】:49_045
【页数】:3P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 电视广播接收机 电子式调谐器基本参数及测量方法 |
| 英文名称： | Basic parameters and methods of measurement on electronic tuner for receivers for television broadcast transmissions |
| 中标分类： |
通信、广播 >>
广播、电视设备 >>
录制设备 |
| ICS分类： |
电信、音频和视频技术 >>
音频、视频和视听工程 >>
无线电接收机
|
| 替代情况： | 被GB/T 8496-2011代替 |
| 发布部门： | 中华人民共和国电子工业部 |
| 发布日期： | 1987-11-28 |
| 实施日期： | 1988-07-01 |
| 首发日期： | 1987-12-28 |
| 作废日期： | 2012-02-01 |
| 主管部门： | 信息产业部（电子） |
| 归口单位： | 全国音频、视频及多媒体系统与设备标准化技术委员会 |
| 起草单位： | 丹东调谐器总厂和上海电视调谐器厂 |
| 起草人： | 戴建中、王均龙、李振涛、彭守本 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 1900-01-01 |
| 页数： | 19页 |
适用范围
本标准适用于电视广播接收机用甚高频/特高频（VHF/UHF）电子式调谐器。录像机用电子式调谐器也可参照使用。
前言
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目录
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引用标准
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所属分类： 通信 广播 广播 电视设备 录制设备 电信 音频和视频技术 音频 视频和视听工程 无线电接收机