SJ/T 11122-1997 电视节目自动播出系统的技术要求及测量方法
时间:2024-05-14 06:46:22 来源: 标准资料网 作者：标准资料网 阅读：8307
基本信息
| 标准名称： | 电视节目自动播出系统的技术要求及测量方法 |
| 英文名称： | Technical requirements and test methods of TV program automatic broadcasting systems |
| 中标分类： |
|
| ICS分类： |
电信、音频和视频技术 >>
音频、视频和视听工程 >>
其他音频、视频和视听
|
| 发布部门： | 中华人民共和国电子工业部 |
| 发布日期： | 1997-09-03 |
| 实施日期： | 1998-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 归口单位： | 电子工业部标准化研究所 |
| 起草单位： | 北京电视设备厂、北京广播学院 |
| 起草人： | 曹云生、陈善移、武世鹏、卢桂兰 |
| 出版日期： | 1998-01-01 |
| 页数： | 10页 |
适用范围
本标准规定了电视节目自动播出系统的技术要求和测试方法。本标准适用于电视节目自动播出系统。
前言
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目录
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引用标准
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所属分类： 电信 音频和视频技术 音频 视频和视听工程 其他音频 视频和视听
【英文标准名称】:StandardTestMethodsforPerformanceCharacteristicsofMetallicBondedResistanceStrainGages
【原文标准名称】:金属粘结电阻应变仪性能特征的标准试验方法
【标准号】:ASTME251-1992(2003)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:E28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:测量;机械试验;应变;试验;质量;延伸;伸长仪;试验设备;应变仪;工作特性
【英文主题词】:bondedresistancestraingages;elongation-metallicmaterials;gagefactor;performance;resistance;resistancegages;straingages;temperaturetests;transversesensitivity;performancecharacteristicsofmetallicbondedresistancestraingages,test
【摘要】:Straingagesarethemostwidelyuseddevicesforthedeterminationofmaterials,propertiesandforanalyzingstressesinstructures.However,performanceparametersofstraingagesareaffectedbyboththematerialsfromwhichtheyaremadeandtheirgeometricdesign.Thesetestmethodsdetailtheminimuminformationthatmustaccompanystraingagesiftheyaretobeusedwithacceptableaccuracyofmeasurement.Mostperformanceparametersofstraingagesrequiremechanicaltestingthatisdestructive.Sincetestgagescannotbeusedagain,itisnecessarytotreatdatastatisticallyandthenapplyvaluestotheremainingpopulationfromthesamelotorbatch.Failuretoacknowledgetheresultinguncertaintiescanhaveseriousrepercussions.Resistancemeasurementisnon-destructiveandcanbemadeforeachgage.Properlydesignedandmanufacturedstraingages,whosepropertieshavebeenaccuratelydeterminedandwithappropriateuncertaintiesapplied,representpowerfulmeasurementtools.Theycandeterminesmalldimensionalchangesinstructureswithexcellentaccuracy,farbeyondthatofotherknowndevices.Itisimportanttorecognize,however,thatindividualstraingagescannotbecalibrated.Ifcalibrationandtraceabilitytoastandardarerequired,straingagesshouldnotbeemployed.Tobeused,straingagesmustbebondedtoastructure.Goodresultsdependheavilyonthematerialsusedtocleanthebondingsurface,tobondthegage,andtoprovideaprotectivecoating.Skilloftheinstallerisanothermajorfactorinsuccess.Finally,instrumentationsystemsmustbecarefullydesignedtoassurethattheydonotundulydegradetheperformanceofthegages.Inmanycases,itisimpossibletoachievethisgoal.Ifso,allowancemustbemadewhenconsideringaccuracyofdata.Testconditionscan,insomeinstances,besoseverethaterrorsignalsfromstraingagesystemsfarexceedthosefromthestructuraldeformationstobemeasured.Greatcaremustbeexercisedindocumentingmagnitudesoferrorsignalssothatrealisticvaluescanbeplacedonassociateduncertainties.1.1Thepurposeofthisstandardistoprovideuniformtestmethodsforthedeterminationofstraingageperformancecharacteristics.Suggestedtestingequipmentdesignsareincluded.1.2TestMethodsE251describesmethodsandproceduresfordeterminingfivestraingageparameters:SectionPartI-GeneralRequirements7PartII-ResistanceataReferenceTemperature8PartIII-GageFactorataReferenceTemperature9PartIV-TemperatureCoefficientofGageFactor10PartV-TransverseSensitivity11PartVI-ThermalOutput12Product Code:SAE J1922
Title:Powertrain Control Interface for Electronic Controls Used in Medium- and Heavy-Duty Diesel On-Highway Vehicle Applications (STABILIZED Aug 2011)
Issuing Committee:Truck And Bus Low Speed Communication Network Committee
Scope:This SAE Recommended Practice provides a development or possibly interim production communication protocol between engine, transmission, ABS/traction control, and retarder systems until higher speed communication links are established.