作者:标准资料网 时间:2024-05-12 13:42:32   浏览:8681   来源:标准资料网

【英文标准名称】:Non-destructivetesting-Ultrasonicinspection-Characterizationofsearchunitandsoundfield
【原文标准名称】:无损检测超声波探伤探测仪和声场特性
【标准号】:ISO10375-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC135
【标准类型】:()
【标准水平】:()
【中文主题词】:试验条件;无损检验;超声检验;试验设备;声传输;特性
【英文主题词】:Characteristics;Non-destructivetesting;Soundtransmission;Testequipment;Testingconditions;Ultrasonictesting
【摘要】:ThisInternationalStandardestablishesproceduresforspecifyingcertainultrasonicsearchunitcharacteristicsandformeasuringtheassociatedsoundfield.Theaimistoestablishuniformityoftestingtechniques,toformabasisfortheinterpretationofresultsobtainedbydifferentlaboratoriesandatdifferenttimes.NotethatthisInternationalStandardestablishesnoacceptancecriteria;however,itdoesestablishthetechnicalbasisforcriteriathatmaybedefinedbyuserparties.ISO2400describesacalibrationblockusedinweldinspectionforcheckingtheperformanceoftheultrasonicinstrumentandsearchunit.Tofurtherenhancethegeneralultrasonicinspectioncapability,informationconcerningthesearchunit'stimedomainresponse,frequencyresponse(alsoreferredtoasfrequencyspectrum,frequencyanalysis,spectrumanalysisandsignatureanalysis)andsoundfieldmustbeknownbeforereliabledetectionandcharacterizationofflawscanbeachieved.Thesearchunitsdiscussedhereinarestraight-beamandangle-beamsearchunitswithanominalultrasonicfrequencyfrom0,5MHzto15MHz.Surfacewavesearchunitsarenotincludedinthisstandard.Thisstandardprovidesproceduresforspecifyingsoundfieldparametersaswellasmethodsofmeasurementinimmersiontests.Thisstandarddoesnotaddresssoundfieldmeasurementincontacttests.ThisInternationalStandarddescribesmeasurementproceduresforevaluatingcharacteristicsofultrasonicsearchunitsanddescribestechniquesusedforobtainingsoundfielddataproducedbyelectricallypulse-excitedsearchunitsusedinthefieldorinthelaboratory.Thecharacteristicparametersdiscussedinthisstandardaretheupper,lowerandcentrefrequencies,thewavelength,thebandwidth,thetimedomainandfrequencydomainresponses,thenear-fieldlength,thehalf-angleofbeamspreadforsearchunitsofdifferentshapesinfreefield,echosoundmeasurements,beamprofiles,theimpedanceandtherelativesensitivity.Formatsforspecifyingbothflat-faceandfocusedsearchunitsaregiven.Toprovidebaselineinformationandtocheckpossibleperformancedegradation,theelectricalpropertiesofthesearchunitaremeasuredindependentlyoftheultrasonicinstrument.Theelectricalimpedanceandsensitivityaremeasuredatspecificfrequenciesselectedforeachsearchunit.Theelectricalimpedancecorrespondstothecomplexinputimpedanceofthesearchunitandthesensitivityofthesearchunitisameasureoftheelectroacousticefficiencyoftheunit.Theseproceduresaredescribedin4.6and4.7,respectively.
【中国标准分类号】:H26
【国际标准分类号】:19_100
【页数】:17P;A4
【正文语种】:英语