外文翻译液位检测文档格式.docx
- 文档编号:7493326
- 上传时间:2023-05-08
- 格式:DOCX
- 页数:13
- 大小:26.02KB
外文翻译液位检测文档格式.docx
《外文翻译液位检测文档格式.docx》由会员分享,可在线阅读,更多相关《外文翻译液位检测文档格式.docx(13页珍藏版)》请在冰点文库上搜索。
Generallytheprocessofcontainers,tanks,towers,tankofliquidsurfacepositionlevel,slotbucket,cans,andwarehouseChuFasolidblock,theaccumulationofparticles,powderheightandsurfacepositioniscalledamateriallevel;
Twonotfluidboundarybetweentheheightandtheliquidandsolidseparationheightiscalledinterfaceposition,thepositionofassemblylevel,materiallevel,liquidlevelinterface.
Materiallevelmeasurementtocorrectlymeasurethecontainerstoragecapacityorquality,knowcontainerlevelofhighandlowandadjustatanytime,inthematerialleveltomaintaintherequiredheight.
Materiallevelmeasurementinchemicalprocess,notonlyundernormaltemperature,atmosphericpressureandordinarymedium,materiallevel,liquidlevelmeasurementoftheinterface,butalsooftenmeethightemperature,lowtemperature,highpressure,inflammableandexplosive(negativetemperature).Viscosityandfoam,boilingdielectricmateriallevelmeasurementproblems.
Inordertoadapttothecharacteristicsofchemicalobjects,tomeettherequirementsofthechemicalprocessmateriallevelmeasurement,therearemanymateriallevelmeasurementandinstrumentation.
1.Ultrasonicliquidlevelmeterandradarmateriallevelmeter
(1)ultrasonicliquidlevelmeter
Materiallevelmeasurementprocess,theultrasonicsignal,issuedbytheultrasonicprobe,theliquidorsolidmaterialsurfaceafterlaunchback,bythesamesensorreceiving,ultrasonicmeasurementofthewholerunningtime,soastorealizethemeasurementofmateriallevel,acousticvelocitytransmissionoftheultrasonicpulse,fromtransmittingtoreceivingtoultrasonicpulseneedtimeintervalandthetransducertothesurfaceofthemeasuredmediumisproportionaltothedistance.
Emitultrasoniclevelmeterpulse,nottheechoofdetectionatthesametime.Duetothelaunchoftheultrasonicpulsewidthhasacertaintime,andafterlaunchtheultrasonicsensorandaftershocks,duringcannotdetecttheecho,sofromthestartdownthesurfaceoftheprobeashortdistancecan'
tnormalinspection,thisdistanceiscalledblindspots.Wasthehighestlevelsuchasintotheblindarea,detectinstrumentwillnotbeabletocorrectly,therewillbeerror,ifnecessary,heightenedlevelmetercanbeinstalled.
Ultrasonicliquidlevelmeteralsohasshortcomings,theultrasonictransmissionbygasinterference,levelsurfacebubbles,corrugated,etc,theultrasonictransmissionbygasinterference,levelsurfacebubbles,corrugated,etc.,theultrasonicreflectioneffect.Materialisvolatile,liquidgasentrapment,thecontainerbyvibration(e.g.,motors)areinstalledonthecontainercan'
tuseultrasonicliquidlevelmeter.
(2)radarmateriallevelmeter
RadarlevelgaugeUSESlaunch-reflection-receiveworkmode.Radarlevelmeterantennaemitelectromagneticwave,thewavereflectedbythemeasuredobjectsurface,againbytheantenna,theelectromagneticwavefromtransmittingtoreceivingtimeisproportionaltothedistancetotheliquidsurface.Inpractice,therearetwokindsofradarlevelgaugemeansthefrequencymodulationcontinuouswaveandpulsewave.Liquidlevelmeteradoptsfrequencymodulationwavetechnology,powerconsumptionisbig,thefourwiresystem,shouldbeusedinelectroniccircuitiscomplicated.Andtheradarpulsewavetechnologylevelgauge,lowpowerconsumption,easytoimplementessentialsafety,highprecision,widerapplicationscope.
Radarlevelgaugemeasuringtheelectromagneticwavescanpassthroughavacuum,don'
tneedatransmissionmedium,isnotaffectedbyair,steam,groovevolatilefogeffect,canbeusedforsuchascoarsebenzenevolatilemediumlevelmeasurement.
Radarlevelmetercanbeusedforalmostalloftheliquidlevelmeasurement.Electromagneticwaveonthesurfacelevelwhenfiring,signalattenuation,whenthesignalattenuationthroughthehours,canleadtoradarlevelmetercannotdetectenoughelectromagneticwavesignal,theconductivemediumcanbeaverygoodreflectionofelectromagneticwave,thedielectricconstantisgreaterthan1.5nonconductivemediumdielectricconstantwas1.0(air)willalsobeabletoguaranteesufficientreflectionwave,dielectricconstant,thegreaterthereflectionsignal.Inpractice,almostallmediumcanreflectenoughofreflectionwave.
(3)radarlevelgauge,ultrasonicliquidlevelmeter
Ultrasoundandradaristhemainmeasuringprincipleisdifferent,leadtotheirdifferentapplicationoccasions,radarisgiventhatthedielectricconstantofthemeasuredsubstance,whichisgiventhatthedensityofthematerialbeingmeasured,sothelowdielectricconstantmaterialradarmeasurementswillbeeffecttosellatadiscountgreatly,thesolidmatteringeneral,pushharder,anotherwaveofdifferentmeansoftransmissioncomponents,suchasultrasonicwavewaslaunchedbythevibrationofthepiezoelectricmaterial,soitiscanbeusedinhigherpressureornegativepressureofthesituation,usuallyonlyintheatmosphericpressurecontainers.Theradarcanbeusedintheprocessofhighpressuretank.RadaremissionAngleisbiggerthanultrasound,smallcontainersorelongateddon'
trecommendusingnon-contactradar,generallyrecommendadirectorradar.Finallyisthetemperatureontheaccuracy,ofcourse,mustbehigherthantheultrasonic,radarmustusehighresolutionradarinthetank,withoutultrasonic.Asfortheprice,usuallyultrasonic,lowerthantheradarinawiderangeofcoursesomeultrasonicpriceisalsohigh.Suchastherangeof6-70meters,thepreferredultrasonicliquidlevelmeter.Payattentiontothestirringgroove,groovewalladhesioncanproduceinterferenceofthereflectedwave,levelmeasurement,theinstallationistochoosetheappropriateinstallationposition,soastoavoidtheinterferenceofthesefactors.
Leveltwocategories,includingliquidlevelandmateriallevel.Liquidlevelandliquidlevelindicatorandtwocontinuouslevelmeasurement.Liquidlevelindicatoristhelevelofseveralfixedpositionmeasuring,usedinliquidlevelofupperandlowerlimitalarm,etc.Continuouslevelmeasurementistomeasureliquidlevelcontinuously,itiswidelyusedinmanyfieldssuchaspetroleum,chemicalindustry,foodprocessing,haveveryimportantsignificance.Formorethan20kindsofcontinuouslevelmeasurementmethodforcomparativeanalysis.Glasstube,glassplate,doublecolorwatermethod.
Manualgaugingglasstubemethod:
thismethodisusingtheprincipleofcommunicatingvessels,levelscalereaddirectlyfromtheinstructions.Glassplatemethod:
glasswhichcanbeinstalledthroughconnectorscanalsobeinstalledinthecontainerwallopenings,andseriesafewpieceofglasstoincreasetherange.Numericalscalereaddirectlyfromtheglassplatelevel.
Doublecolorgaugemethod:
thismethodusingtheopticalprinciple,makewatershowsgreen,andmakethewatervaporshowsred,whichindicatethewaterlevel.
Artificialgaugingmethod:
themethodisusedformeasuringoiltankliquidlevel.Whenmeasuring,thesurveyorgaugeSurveyortovolumeoftheoildipstickintooil,andfiledwhenfeetleadcontactwiththetankbottomoildipstick.Accordingtothequantityofoiltracesontheoildipstick,readouttheoillevelheight;
Endaccordingtothequantityofoildipsticktestcreamcolorchangetodeterminetheheightofthewatercushionlayer,todeterminehighoilandhighwaterabove4methodsareartificialmeasurementmethod,measurementissimple,theadvantagesofhighreliability,intuitive,andlowcost.
Blowingmethod,differentialmethod,HTGblowingmethod:
becauseoftheblowpipeapproximationisequaltothefluidcolumnpressureinthestaticpressure,thusP=rhogHtypeofrho-liquiddensity;
H-level.SotheliquidlevelismeasuredbythestaticpressurePcanbeH.Strongmethodsuitableformeasuringthecorrosivegasblowing,havesuspendedmaterialcontentintheliquid,andismainlyusedinthemeasurementaccuracyisnothigh.
Differentialpressuremethod:
theopencontaineroratmosphericvessels,valvesandgasphasepressurepipelinesaves.BasedontherelationshipbetweendifferentialpressureandliquidlevelΔP=P2-P1=rhogHtype:
ΔP-positiveandnegativepressurechamberpressuretransmitter;
P2andP1-ledtubepressure;
H-level.Differentialpressuretransmitterwillpressuredifferencetransformationfor4~20mAdcsignal.Ifthepressureinthemeasuringrangelowerlimitofthecorrespondingoutputsignalisgreaterthanorlessthan4mA,areallneedtoadjustthemigrationzeromigrationtechnologysuchasspring,isequalto4mA.HTGmethod:
thismethodisappliedtodifferentialpressureoiltankliquidlevelmeasurement.
Buoymethod:
thismethodUSESthemiddlemaglevbarrelwithholesasliquidlevelsensor.Stainlesssteelcasingfrombuoyholethroughthemiddle,betweenfixedtotheroofandbottom.Liquidlevelchangedrivenmaglevhollowtube(permanentmagnet)hidesinsidecanmoveupanddownthecasing,andattractthecasingofmagnetcanmoveupanddownthecasingwall,secondaryinstrument|instrumentaccordingtothemovingmagnetvolumetocalculatetheliquid
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 外文 翻译 检测