BS 2769 Sec.2.15-1992 手持电动工具.第2部分:特殊要求.第15节:镂铣机规范
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【英文标准名称】:Hand-heldelectricmotor-operatedtools.Particularrequirements.Specificationforrouters
【原文标准名称】:手持电动工具.第2部分:特殊要求.第15节:镂铣机规范
【标准号】:BS2769Sec.2.15-1992
【标准状态】:作废
【国别】:英国
【发布日期】:1992-08-15
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:作标记;安全措施;试验条件;切削机床;使用说明;木工机械;职业安全;机床;轻便机床;手柄(工具);特形铣床;电驱动装置
【英文主题词】:
【摘要】:
【中国标准分类号】:K64
【国际标准分类号】:
【页数】:12P;A4
【正文语种】:英语
【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Precisionmethodsforreverberationrooms
【原文标准名称】:声学.用声压测定噪声源声音功率级.混响室内的精密方法
【标准号】:BSENISO3741-2000
【标准状态】:作废
【国别】:英国
【发布日期】:2000-06-15
【实施或试行日期】:2000-06-15
【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】:发出的空气噪声;声级;数学计算;试验;规范(验收);定义;测量技术;噪声(环境的);声学试验;声学测量;噪声测量;测定;声强;混响;音量;测量;声学;测量仪器;机器;声源;混响室法;混响室;响度
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoiseemitted;Calibration;Clay;Concentration;Definitions;Determination;Earprotectors;Environment;Filters;Frequencies;Handling;Hearingabilitytests;Humidity;Indications;Information;Loudnesslevels;Loudspeakers;Machines;Mathematicalcalculations;Measurement;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringrooms;Measuringtechniques;Microphones;Noise;Noise(environmental);Noisemeasurements;Noisesources;Observation;Operatingconditions;Position;Powerlevels;Precision;Reverberation;Reverberationroommethod;Reverberationrooms;Rooms;Sound;Soundabsorption;Soundintensity;Soundlevel;Soundpower;Soundpressure;Soundsources;Specification(approval);Standarddeviation;Surfaces;Temperature;Testing;Volume(sound)
【摘要】:1ThisInternationalStandardspecifiesadirectmethodandacomparisonmethodfordeterminingthesoundpowerlevelthatwouldbeproducedbyasourceoperatinginanenvironmentatstandardmeteorologicalconditionscorrespondingtoacharacteristicimpedanceofρc=400N·s/m(whereρisthedensityofairandcisthespeedofsound).Itspecifiestestroomrequirements,sourcelocationandgeneralrulesforoperatingconditions,instrumentationandtechniquesforobtaininganestimateofmean-squaresoundpressurelevelsfromwhichthesoundpowerlevelsofthesourceinoctaveorone-third-octavebandsarecalculatedwithagrade1accuracy.Thequantitiestobemeasuredaretime-averagedsoundpressurelevelsinfrequencybands.Thequantitiestobedeterminedaresoundpowerlevels,A-weightedandinfrequencybands.Otherquantities,whichareoptional,aresoundpowerlevelswithotherfrequencyweightingscalculatedfromthemeasurementsinfrequencybands.Thisstandarddoesnotprovidethemeanstodeterminedirectivityandtemporalvariationofsoundfromasource.Ingeneral,thefrequencyrangeofinterestincludestheone-third-octavebandswithmidbandfrequenciesfrom100Hzto10000Hz.GuidelinesfortheapplicationofthespecifiedmethodsinanextendedfrequencyrangeinrespecttolowerfrequenciesaregiveninannexC.ThisInternationalStandardisnotapplicabletofrequencyrangesabovethe10000Hzone-third-octaveband.ForhigherfrequenciestheuseofmethodsgiveninISO9295isrecommended.2ThemethodspecifiedinthisInternationalStandardissuitableforsteadynoisewithbroad-band,narrow-bandanddiscrete-frequencycomponentsasdescribedinISO12001.Thenoisemaybeemittedfromadevice,machine,componentorsub-assembly.ThisInternationalStandardisapplicabletonoisesourceswithvolumeswhicharepreferablynotgreaterthan2%ofthevolumeofthereverberationroomusedforthetest.Forsourceswithvolumesgreaterthan2%oftheroomvolume,thestandarddeviationsgivenbyTable2couldbeexceeded.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:44P;A4
【正文语种】:英语
Product Code:SAE ARP1587
Title:Aircraft Gas Turbine Engine Health Management System Guide
Issuing Committee:E-32 Aerospace Propulsion Systems Health Management
Scope:This SAE Aerospace Recommended Practice (ARP) examines the whole construct of an Engine Health Management (EHM) system. This keystone document gives a top-level view and addresses EHM description, benefits, and capabilities, and provides examples. This ARP purposely addresses a wide range of EHM architectures to demonstrate possible EHM design options. This ARP is not intended as a legal document and does not provide detailed implementation steps, but does address general implementation concerns and potential benefits. Other SAE documents (Aerospace Standards, Aerospace Recommended Practices, and Aerospace Information Reports) address specific component specifications, procedures and "lessons learned".
