【英文标准名称】:Ultrasonics-Focusingtransducers-Definitionsandmeasurementmethodsforthetransmittedfields
【原文标准名称】:超声聚焦传感器定义及传送场的测量方法
【标准号】:IEC61828-2001
【标准状态】:作废
【国别】:国际
【发布日期】:2001-05
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC87
【标准类型】:()
【标准水平】:()
【中文主题词】:测量;试验;输出测定;声场;传输特性;焦点;传感器;调焦点;超声波医用器具;医疗技术学;医疗设备;饱和电抗器;定义;定义;传输;超声波装置;超声波学;电气设备;特性;电气工程;电功率测量;测量技术;安全
【英文主题词】:
【摘要】:ThisInternationalStandard-providesdefinitionsforthetransmittedfieldcharacteristicsoffocusingtransducersforapplicationsinmedicalultrasound;-relatesthesedefinitionstotheoreticaldescriptions,design,andmeasurementofthetransmittedfieldsoffocusingtransducers;-givesmeasurementmethodsforobtainingdefinedcharacteristicsoffocusingtransducers;-specifiesbeamaxisalignmentmethodsappropriateforfocusingtransducers.ThisInternationalStandardrelatestofocusingultrasonictransducersoperatinginthefrequencyrangeappropriatetomedicalultrasound(0,5MHzto40MHz)forboththerapeuticanddiagnosticapplications.Itshowshowthecharacteristicsofthetransmittedfieldoftransducersmaybedescribedfromthepointofviewofdesign,aswellasmeasuredbysomeonewithnopriorknowledgeoftheconstructiondetailsofaparticulardevice.Theradiatedultrasoundfieldforaspecifiedexcitationismeasuredbyahydrophoneineitherastandardtestmedium(forexample,water)orinagivenmedium.Thestandardappliesonlytomediawherethefieldbehaviourisessentiallylikethatinafluid(i.e.wheretheinfluenceofshearwavesandelasticanisotropyissmall),includingsofttissuesandtissue-mimickinggels.Anyaspectsofthefieldthataffecttheirtheoreticaldescriptionorareimportantindesignarealsoincluded.Thesedefinitionswouldhaveuseinscientificcommunications,systemdesignanddescriptionoftheperformanceandsafetyofsystemsusingthesedevices.Thisstandardincorporatesdefinitionsfromotherrelatedstandardswherepossible,andsuppliesnew,morespecificterminology,bothfordefiningfocusingcharacteristicsandforprovidingabasisformeasurementofthesecharacteristics.note:1Specifically,IEC61102andIEC61157(seeclause2).
【中国标准分类号】:N65
【国际标准分类号】:01_040_17;17_140_50
【页数】:49P;A4
【正文语种】:英语


【英文标准名称】:StandardSpecificationforPoly(VinylChloride)(PVC)-CoatedSteelTensionWireUsedwithChain-LinkFence
【原文标准名称】:与链接栅栏一起使用的聚氯乙烯涂层拉伸钢丝的标准规范
【标准号】:ASTMF1664-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:栏栅;钢丝;镀钢;镀钢材料;聚氯乙烯;聚氯乙烯;链;栏栅材料;链接栅栏;PVC;聚氯乙烯栅栏;涂覆;拉伸钢丝
【英文主题词】:polyvinylchloridepvc;pvc;steelwire;linkfence;emcoated;tensionwire;empvc;fencingmaterials;pvcfence;chain;coatedsteel;coatedsteelmaterials;fences
【摘要】:
【中国标准分类号】:A29
【国际标准分类号】:
【页数】:
【正文语种】:英语