【英文标准名称】:StandardPracticeforVerifyingAcousticEmissionSensorResponse
【原文标准名称】:检验声音传播传感器响应的标准实施规程
【标准号】:ASTMF2174-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:F18.55
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:acrylicrod;calibration;sensor;Acousticemission(AE)testing;Acrylicsensorrod;Calibration--acousticemissionanalysisinstrumentation;Sensitivitycriterion/response;Sensors;Verification
【摘要】:Degradationinsensorperformancecanoccurduetodropping,mechanicalshockwhilemountedontheteststructure,temperaturecycles,andsoforth.Itisnecessaryanddesirabletohaveasimplemeasurementprocedurethatwillchecktheconsistencyofsensorresponse,whileholdingallothervariablesconstant.Whiletestblocksofmanydifferentkindshavebeenusedforthispurposeformanyyears,anacrylicpolymerrodoffersthebestall-aroundcombinationofsuitableacousticproperties,practicalconvenience,easeofprocurement,andlowcost.Becausetheacousticpropertiesoftheacrylicrodareknowntodependontemperature,thispracticerequiresthattherod,sensors,andcouplantbestabilizedatthesameworkingtemperature,priortoapplicationofthepractice.Attentionshouldbepaidtostorageconditionsfortheacrylicpolymerrod.Forexample,itshouldnotbeleftinafreezingorhotenvironmentovernight,unlessitisgiventimefortemperaturestabilizationbeforeuse.Properlyappliedandwithproperrecordkeeping,thispracticecanbeusedinmanyways,suchas:Todeterminewhenasensorisnolongersuitableforuse.Tochecksensorsthathavebeenexposedtohigh-riskconditionssuchasdropping,overheating,andsoforth.Togetanearlywarningofsensordegradationovertime.Toobtainmatchedsetsofsensorsandpreamplifiers.Toverifysensorsquicklybutaccuratelyinthefield,andtoassisttroubleshootingwhenachanneldoesnotpassaperformancecheck.1.1Thispracticeisusedforroutinelycheckingthesensitivityofacousticemission(AE)sensors.Itisintendedtoprovideareliable,preciselyspecifiedwayofcomparingasetofsensorsortellingwhetheranindividualsensor''ssensitivityhasdegradedduringitsservicelife,orboth.1.2Theprocedureinthispracticeisnotax201C;calibrationx201D;anddoesnotgivefrequency-responseinformation.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thispracticedoesnotpurporttorecommendonesensormanufactureroveranothernordoesitimplythatonetypeofsensorwillreactdifferentlyfromanotherwhenusingthisprocedure.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N65
【国际标准分类号】:17_140_01
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:StandardGuideforNon-destructiveExaminationofPaper
【原文标准名称】:纸的无损检验的标准指南
【标准号】:ASTME2325-2005e1
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:E30.02
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:forensicdocumentexamination;forensicsciences;non-destructivepaperexamination;paper;questioneddocuments;watermark;Nondestructiveexamination;Paper
【摘要】:Theproceduresoutlinedherearegroundedinthegenerallyacceptedbodyofknowledgeandexperienceinthefieldofforensicdocumentexamination.Byfollowingtheseprocedures,aforensicdocumentexaminercanreliablyevaluatethephysicalsimilaritiesordifferencesbetweenpapersthatcanleadtoadeterminationastowhetherpapersoriginatedfromthesamesource.1.1Thisguideprovidesproceduresthatshouldbeusedbyforensicdocumentexaminers(seeGuideE444)fornon-destructiveexaminationsofpaper.1.2Theseproceduresareapplicablewhethertheexaminationisofquestionedandknownitemsorofexclusivelyquestioneditems.1.3Theseproceduresincludeevaluationofthesufficiencyofthematerialavailableforexamination.1.4Theparticularmethodsemployedinagivencasewilldependuponthenatureofthematerialavailableforexamination.1.5Thisguidemaynotcoverallaspectsofparticularlyunusualoruncommonexaminationsofpapersamples.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y30
【国际标准分类号】:85_060
【页数】:3P.;A4
【正文语种】:英语