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【英文标准名称】:Ultrasonics—Hydrophones—Part1:Measurementandcharacterizationofmedicalultrasonicfieldsupto40MHz
【原文标准名称】:超声学.水听器.第1部分:医疗超声波场频率小于40MHz的测量和特性
【标准号】:BSEN62127-1-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2008-05-30
【实施或试行日期】:2008-05-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:声学测量;特性记述;特性;定义;描述;电气工程;电声学;电医学;音域测量;频率;频率范围;水听器;测量;测量条件;测量技术;医学科学;压电的;灵敏度;声场;声压;声换能器;规范(验收);超声波装置;超音频;超声检验;超声波学
【英文主题词】:Acousticmeasurement;Characterisations;Characteristics;Definition;Definitions;Descriptions;Electricalengineering;Electroacoustics;Electromedicine;Fieldmeasurement;Frequencies;Frequencyranges;Hydrophones;Measurement;Measurementconditions;Measuringtechniques;Medicalsciences;Piezoelectric;Sensitivity;Soundfields;Soundpressure;Soundtransducer;Specification(approval);Ultrasonicdevices;Ultrasonicfrequencies;Ultrasonictesting;Ultrasonics
【摘要】:ThispartofIEC62127specifiesmethodsofuseofcalibratedhydrophonesforthemeasurementinliquidsofacousticfieldsgeneratedbyultrasonicmedicalequipmentoperatinginthefrequencyrangeupto40MHz.Theobjectivesofthisstandardare:–todefineagroupofacousticparametersthatcanbemeasuredonaphysicallysoundbasis;–todefineasecondgroupofparametersthatcanbederivedundercertainassumptionsfromthesemeasurements,andcalledderivedintensityparameters;–todefineameasurementprocedurethatmaybeusedforthedeterminationofacousticpressureparameters;–todefinetheconditionsunderwhichthemeasurementsofacousticparameterscanbemadeinthefrequencyrangeupto40MHzusingcalibratedhydrophones;–todefineproceduresforcorrecting,forlimitationscausedbytheuseofhydrophoneswithfinitebandwidthandfiniteactiveelementsize.NOTE1Throughoutthisstandard,SIunitsareused.Inthespecificationofcertainparameters,suchasbeamareasandintensities,itmaybeconvenienttousedecimalmultiplesorsubmultiples.Forexamplebeamareamaybespecifiedincm2andintensitiesinW/cm2ormW/cm2.NOTE2Thehydrophoneasdefinedmaybeofapiezoelectricoranoptictype.Theintroductionhoweverimpliesthatopticalhydrophonesarenotcovered.
【中国标准分类号】:C41
【国际标准分类号】:11_040_60;17_140_50
【页数】:84P.;A4
【正文语种】:英语


【英文标准名称】:Datatransmission;useonpublicdatanetworksofdataterminalequipment(DTE)whicharedesignedforinterfacingtoasynchronousduplexV-seriesmodems
【原文标准名称】:数据网中起动-停止-传输用的DEE和DUE间的接口
【标准号】:DIN66021-6-1981
【标准状态】:作废
【国别】:德国
【发布日期】:1981-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:起停式传输;信息处理;数据处理;接口;信号;界面;信息网络
【英文主题词】:informationprocessing;informationnetworks;interfaces;dataprocessing;interfaces(dataprocessing);start-stoptransmission;signals
【摘要】:
【中国标准分类号】:M19
【国际标准分类号】:35_200
【页数】:3P;A4
【正文语种】:德语