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Product Code:SAE J2719
Title:Hydrogen Fuel Quality for Fuel Cell Vehicles
Issuing Committee:Fuel Cell Standards Committee
Scope:This Standard provides background information and a hydrogen fuel quality standard for commercial proton exchange membrane (PEM) fuel cell vehicles. This Report also provides background information on how this standard was developed by the Hydrogen Quality Task Force (HQTF) of the Interface Working Group (IWG) of the SAE Fuel Cell Standards Committee.【英文标准名称】:Ultrasonics-Physiotherapysystems-Fieldspecificationsandmethodsofmeasurementinthefrequencyrange0,5MHzto5MHz
【原文标准名称】:超音波学.物理疗法系统.频率范围0.5MHz～5MHz的超声波场规范和测量方法
【标准号】:BSEN61689-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-12-31
【实施或试行日期】:2007-12-31
【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;定义;测量;测量技术;医疗设备;医学科学;工作性能;物理治疗;评定;声压;测试;治疗设备;超声波装置;超声波工程;超音频;超声波学
【英文主题词】:Acoustics;Definitions;Electricalengineering;Measurement;Measuringtechniques;Medicalequipment;Medicalsciences;Performanceinservice;Physiotherapy;Ratings;Soundpressure;Testing;Therapyequipment;Ultrasonicdevices;Ultrasonicengineering;Ultrasonicfrequencies;Ultrasonics
【摘要】:ThisInternationalStandardisapplicabletoultrasonicequipmentdesignedforphysiotherapyconsistingofanultrasonictransducergeneratingcontinuousorquasi-continuouswaveultrasonicenergyinthefrequencyrange0,5MHzto5MHz.Thisstandardonlyrelatestoultrasonicphysiotherapyequipmentemployingasingleplaneunfocusedcirculartransducerpertreatmenthead,producingstaticbeamsperpendiculartothefaceofthetreatmenthead.Thisstandardspecifies:–methodsofmeasurementandcharacterizationoftheoutputofultrasonicphysiotherapyequipmentbasedonreferencetestingmethods;–characteristicstobespecifiedbymanufacturersofultrasonicphysiotherapyequipmentbasedonreferencetestingmethods;–guidelinesforsafetyoftheultrasonicfieldgeneratedbyultrasonicphysiotherapyequipment;–methodsofmeasurementandcharacterizationoftheoutputofultrasonicphysiotherapyequipmentbasedonroutinetestingmethods;–acceptancecriteriaforaspectsoftheoutputofultrasonicphysiotherapyequipmentbasedonroutinetestingmethods.Therapeuticvalueandmethodsofuseofultrasonicphysiotherapyequipmentarenotcoveredbythescopeofthisstandard.
【中国标准分类号】:C41
【国际标准分类号】:11_040_55
【页数】:64P.;A4
【正文语种】:英语