【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
【标准状态】:现行
【国别】:
【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(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
【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:3.5.1Todeterminewhenasensorisnolongersuitableforuse.3.5.2Tochecksensorsthathavebeenexposedtohigh-riskconditionssuchasdropping,overheating,andsoforth.3.5.3Togetanearlywarningofsensordegradationovertime.3.5.4Toobtainmatchedsetsofsensorsandpreamplifiers.3.5.5Toverifysensorsquicklybutaccuratelyinthefield,andtoassisttroubleshootingwhenachanneldoesnotpassaperformancecheck.1.1Thispracticeisusedforroutinelycheckingthesensitivityofacousticemission(AE)sensors.Itisintendedtoprovideareliable,preciselyspecifiedwayofcomparingasetofsensorsortellingwhetheranindividualsensor'ssensitivityhasdegradedduringitsservicelife,orboth.1.2Theprocedureinthispracticeisnota"calibration"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】: