标准名称：	机车车辆车轮检查器
英文名称：	Wheel-checker for railway locomotive and vehicle
中标分类：	铁路 >> 机车车辆通用标准 >> 机车车辆检修工艺与设备
ICS分类：	铁路工程 >> 铁路车辆
替代情况：	TB/T 1360-1980 TB/T 1361-1980 TB/T 2597-1996
发布部门：	中国人民共和国铁道部
发布日期：	2005-03-29
实施日期：	2005-07-01
首发日期：
作废日期：
主管部门：	中国人民共和国铁道部
提出单位：	中国南车集团戚墅堰机车车辆工艺研究所
归口单位：	中国南车集团戚墅堰机车车辆工艺研究所
起草单位：	中国南车集团戚墅堰机车车辆工艺研究所、铁路部标准计量研究所、哈尔滨铁路局计量管理中心
起草人：	蒋田芳、王彦春、付德利
出版社：	中国铁道出版社
出版日期：	2005-07-01
页数：	7页

本标准规定了机车车辆车轮检查器（以下简称检查器）的结构形式、技术要求、试验方法、检验规则及标志、包装等。本标准适用于静态接触式测量机车车辆车轮轮缘和踏面有关尺寸的游标类检查器和数显类检查器。其他测量装置可参照使用。

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【英文标准名称】:StandardGuideforDeterminingtheReproducibilityofAcousticEmissionSensorResponse
【原文标准名称】:声发射传感器响应再现性测定的标准指南
【标准号】:ASTME976-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:E07.04
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:声发射测试;降解;再现性;传感器
【英文主题词】:Acousticemission(AE)testing;Degradation;Reproducibility;Sensors
【摘要】:Acousticemissiondataisaffectedbyseveralcharacteristicsoftheinstrumentation.Themostobviousoftheseisthesystemsensitivity.Ofalltheparametersandcomponentscontributingtothesensitivity,theacousticemissionsensoristheonemostsubjecttovariation.Thisvariationcanbearesultofdamageoraging,ortherecanbevariationsbetweennominallyidenticalsensors.Todetectsuchvariations,itisdesirabletohaveamethodformeasuringtheresponseofasensortoanacousticwave.Specificpurposesforcheckingsensorsinclude:(1)checkingthestabilityofitsresponsewithtime;(2)checkingthesensorforpossibledamageafteraccidentorabuse;(3)comparinganumberofsensorsforuseinamultichannelsystemtoensurethattheirresponsesareadequatelymatched;and(4)checkingtheresponseafterthermalcyclingorexposuretoahostileenvironment.Itisveryimportantthatthesensorcharacteristicsbealwaysmeasuredwiththesamesensorcablelengthandimpedanceaswellasthesamepreamplifierorequivalent.Thisguidepresentsseveralproceduresformeasuringsensorresponse.Someoftheseproceduresrequireaminimumofspecialequipment.ItisnottheintentofthisguidetoevaluateAEsystemperformance.RefertoPracticeE750forcharacterizingacousticinstrumentationandrefertoGuideE2374forAEsystemperformanceverification.Theproceduresgiveninthisguidearedesignedtomeasuretheresponseofanacousticemissionsensortoanarbitrarybutrepeatableacousticwave.Theseproceduresinnowayconstituteacalibrationofthesensor.Theabsolutecalibrationofasensorrequiresacompleteknowledgeofthecharacteristicsoftheacousticwaveexcitingthesensororapreviouslycalibratedreferencesensor.Ineithercase,suchacalibrationisbeyondthescopeofthisguide.Thefundamentalrequirementforcomparingsensorresponsesisasourceofrepeatableacousticwaves.Thecharacteristicsofthewavedonotneedtobeknownaslongasthewavecanbereproducedatwill.Thesourcesandgeometriesgiveninthisguidewillproduceprimarilycompressionalwaves.Whilethesensorswillresponddifferentlytodifferenttypesofwaves,changesintheresponsetoonetypeofwavewillimplychangesintheresponsestoothertypesofwaves.Theseproceduresuseatestblockorrod.Suchadeviceprovidesaconvenientmountingsurfaceforthesensorandwhenappropriatelymarked,canensurethatthesourceandthesensorarealwayspositionedidenticallywithrespecttoeachother.Thedeviceorrodalsoprovidesmechanicalloadingofthesensorsimilartothatexperiencedinactualuse.Caremustbetakenwhenusingthesedevicestominimizeresonancessothatthecharacteristicsofthesensorarenotmaskedbytheseresonances.Theseproceduresallowcomparisonofresponsesonlyonthesametestsetup.Noattemptshouldbemadetocompareresponsesondifferenttestsetups,whetherinthesameorseparatelaboratories.1.1Thisguidedefinessimpleeconomicalproceduresfortestingorcomparingtheperformanceofacousticemissionsensors.Theseproceduresallowtheusertocheckfordegradationofasensorortoselectsetsofsensorswithnearlyidenticalperformances.Theproceduresarenotcapableofprovidinganabsolutecalibrationofthesensornordotheyassuretransferabilityofdatasetsbetweenorganizations.1.2Units8212;ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareinclu......
【中国标准分类号】:L31
【国际标准分类号】:
【页数】:7P.;A4
【正文语种】: