气体分析仪的原理与应用PPT课件

气体分析仪的原理与应用,Paramagnetic,仕富梅气体分析技术,气体分析仪的原理与应用,Paramagnetic,仕富梅磁氧技术,气体分析仪的原理与应用,Paramagnetic,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,O2,CO,CO,CO2,CO2,SO2,HCl,HCl,N2,NO,NO,N2,NO2,NO2,NO2,O2,O2,O2,CO,CO,CO2,CO2,SO2,SO2,HCl,N2,氧气是唯一对磁场具有很强吸引力的气体,我们称它为“顺磁性”,气体分析仪的原理与应用,LED光源光电池接收器,ServomexParamagneticCell,Paramagnetic,磁条,充满氮气的球,反馈线圈,悬浮的镜子,气体分析仪的原理与应用,Paramagnetic,使用一对充满氮气的哑铃来检测氧气哑铃悬浮在一个很强的、不均匀的磁场中,气体分析仪的原理与应用,Paramagnetic,在校验期间，通入氮气使哑铃保持静止位置，从而建立分析仪的零点,气体分析仪的原理与应用,Paramagnetic,样气中的氧气在磁场的作用下，使哑铃发生偏转，由光学反馈系统检测,O2,O2,O2,O2,O2,O2,气体分析仪的原理与应用,Paramagnetic,电流反馈回反馈线圈，产生一个反方向的力距该力距使悬浮回到零位电流正比于氧气的浓度,气体分析仪的原理与应用,氧气测量原理,样气中的氧气总是设法使得哑铃偏转高精度的反馈回路阻碍哑铃的旋转,给出氧浓度的直接测量值,气体分析仪的原理与应用,Paramagnetic,仕富梅磁氧技术:高可靠性高稳定性长寿命高精确度不受环境气体的影响,气体分析仪的原理与应用,仕富梅磁氧技术用于.,xendos1800/1900,.andissuppliedasOEMmodulestoMedicalequipmentmanufacturers.,xentra4100,xentra4900,1100A/H,Portables,Paramagnetic,气体分析仪的原理与应用,氧分析的原理,电化学式顺磁性,气体分析仪的原理与应用,氧的顺磁性,UnpairedelectronsalignwithamagneticfieldandbehavelikesmallmagnetsOxygenmoleculesareattractedintoamagneticfieldNB-Thermalagitationknockselectronsoutofalignmentandreducesmagneticsusceptibility,气体分析仪的原理与应用,磁氧传感器的类型,Magneto-dynamic(Servomex)热/磁风Quinkecell,气体分析仪的原理与应用,磁风,薄的玻璃管,气体出口,细的铂丝,气体入口,环形流动室,冷态的氧分子受到磁场的吸引,气体分析仪的原理与应用,磁风测量室的特点,热装置容易受到背景气体的导热系数影响TemperaturesensitiveTiltandflowsensitivePressuresensitive(effect=1:1.5)Combustiblesmayburnonfilamentcausingerrors普通的灵敏度,气体分析仪的原理与应用,Quinkecell,气体分析仪的原理与应用,Quinkecellfeatures,ConstantflowofnitrogenreferencegasrequiredPoorsamplepressuresensitivity-effectofchanges=2:1SuitableforverycorrosivegasesNotaffectedbysamplethermalconductivity,气体分析仪的原理与应用,Servomexparamagneticcell,气体分析仪的原理与应用,Servomexnullbalancesystem,气体分析仪的原理与应用,Magneto-dynamiccell,Nullbalancesystem-extremelylinearFastresponse,lowpressureeffect(1:1)VeryhighresolutionTemperaturecompensatedCorrosionresistantmaterialsNotsensitivetothermalconductivityofbackgroundgasesExtremelylonglife-doesnotfail“unsafe”,气体分析仪的原理与应用,Servomexcellfeatures,EffectofbackgroundgasessmallOperatesupto110C(with1100H)Effectofpressure(1:1)iseasilycompensatedSolventresistantversionavailable(364Ncell)Flammablesamplescanbehandled(ia)electronics,气体分析仪的原理与应用,ServomexPhotometricTechnologies,气体分析仪的原理与应用,ServomexPhotometricTechnologies,气体分析仪的原理与应用,Transmission,Wavelength,Eachgasabsorbsenergyintheelectromagneticspectruminauniqueway-itsfingerprint.,ServomexPhotometricTechnologies,Fingerprintsareusedtoidentifyandanalysespecificcomponentsinasample.,气体分析仪的原理与应用,Transmission,Wavelength,Eachgasabsorbsenergyintheelectromagneticspectruminauniqueway-itsfingerprint.,ServomexPhotometricTechnologies,Fingerprintsareusedtoidentifyandanalysespecificcomponentsinasample.,气体分析仪的原理与应用,ServomexInfraredTechnology,气体分析仪的原理与应用,5,8,15,2.0,Transmission,Wavelength(microns),ServomexSBDWInfrared,Forthereferencefilter,anabsorptionbandinanareaofthespectrumwherethereisnoabsorptionisselected.,Forthemeasurementfilter,anabsorptionbandcorrespondingtotherequiredgasisselected.,气体分析仪的原理与应用,ServomexInfraredcell(SingleBeam,DualWavelength-SBDW),Filterwheel,IRSource2-15micron(Broadband,hotwirefilament),ChopperMotor,Lens,Samplecell,PyroelectricDetector,Lens,气体分析仪的原理与应用,Whenthereferencefilterisinthebeam,thereisnoabsorptionbythetargetgasinthesample.Thisgivesazeroreading.,ServomexSBDWInfrared,R,气体分析仪的原理与应用,Whenthemeasuringfilterisinthebeam,energyisabsorbedbythetargetgasinthesample.Thisgivesthespanreading.Thedifferencebetweenthezeroandspansignalsisproportionaltotheconcentrationinthesample.,ServomexSBDWInfrared,R,M,气体分析仪的原理与应用,DualBeamIRSensors,DriftresultsfromMeasurementcellcontamination.Ageingdetector,mechanicalmovement,气体分析仪的原理与应用,ServomexGfx(GasFilterCorrelation)Technology,气体分析仪的原理与应用,ServomexGfx(GasFilterCorrelation),Filterwheelwithgasfilledcells,IRSource2-15micron(Broadband,hotwirefilament),ChopperMotor,Lens,Samplecell,PyroelectricDetector,Lens,气体分析仪的原理与应用,ServomexGasFilterCorrelation(Gfx),Somegases-includingCO,CO2,NOandSO2-haveaspectrumwithafinestructure.Thisallowsitsuseasaspecificandhighlyselectiveopticalfilter.,气体分析仪的原理与应用,Whenthecellfilledwithreferencegas(nitrogen)isinthebeam,thereissomeabsorptionbythetargetgasinthesample.Thisisusedasazeroreading.,R,ServomexGfx(GasFilterCorrelation),气体分析仪的原理与应用,Whenthecellfilledwiththetargetgasisinthebeam,energyisabsorbedbythetargetgasinthesample.Thisgivesthespanreading.Thedifferencebetweenthezeroandspansignalsisproportionaltotheconcentrationinthesample.,R,M,ServomexGfx(GasFilterCorrelation),气体分析仪的原理与应用,GasFilterCorrelation,HowItWorksUsesagasfiltertoproduceabeamwhichhasalreadyselectivelyabsorbedIRenergyabsorbedbythegastobemeasured,referencedtoabeamwhichhasnot.,气体分析仪的原理与应用,InfraredAbsorption,Likemanyotherpollutantgases,COabsorbselectromagneticradiationintheinfraredspectrum.TheamountofenergyabsorbedprovidesameasurementoftheCOconcentration.,气体分析仪的原理与应用,InfraredCOSensors,Wecanuseaninfraredfiltertoselectonlythosewavelengthscloseto4.7um.,IRSource,Lens,Filter,SampleCell,Dector,气体分析仪的原理与应用,InfraredCOSensors,ForhighconcentrationCOmeasurements,sensorsusingfilterstoselectthe4.7umregionareideal.ForlowconcentrationCOmeasurementsdualbeamsensorsareoftenused.Thesemeasurementsaresubjecttotwolimitations.,气体分析仪的原理与应用,CrossSensitivity,Othergasesalsoabsorbat4.7umresultingincrosssensitivityerrors.,H2O,CO2,CO,4.7um,WaveLength,Absorption,Wavelengthstransmittedbyfilter.,气体分析仪的原理与应用,GasFilterCorrelation.,OvercomesbothoftheseproblemsgivingHighsensitivityforlowlevelCOmeasurement.Stable,lowinterferencefrombackgroundgases.,气体分析仪的原理与应用,IRSpectrumFineStructure,TheInfraredspectrumofCOisnotasmoothcurve.,WaveLength,Absorption,4.7um,LowResolutionAbsorptionspectrum,气体分析仪的原理与应用,IRSpectrumFineStructure,TheInfraredspectrumofCOisnotasmoothcurvebutconsistsofanumberofdistinctlines.,WaveLength,Absorption,4.7um,HighResolutionDetail,气体分析仪的原理与应用,BeamspectrumafterNOgasfilter,气体分析仪的原理与应用,IRSpectrumFineStructure,WecanusefiltersfilledwithCOtoselectivelyremoveonlythosewavelengthsdirectlyassociatedwithCO.ThisiscalledGasFilterCorrelation,气体分析仪的原理与应用,GfxSensorConstruction,Stableinfraredsourceemitsacollimatedbeamofbroadbandinfraredenergy.,Wavelength,Intensity,气体分析仪的原理与应用,GfxSensorConstruction,BandpassfilterisolatestheregionoftheIRspectrumofinterestforCO.,Wavelength,Intensity,4.7um,气体分析仪的原理与应用,GfxSensorConstruction,Gasfilledcells(Cuvettes)containingCOandN2rotatealternatelyintotheIRbeam.,Wavelength,Intensity,4.7um,COfilledcuvette,N2filledcuvette,气体分析仪的原理与应用,GfxSensorConstruction,WhenN2cuvetteisinthebeamalloftheIRenergyistransmitted,Wavelength(expanded),Intensity,4.7um,COfilledcuvette,N2filledcuvette,气体分析仪的原理与应用,GfxSensorConstruction,WhenCOcuvetteisinthebeamthentheIRenergyisremovedonlyatthewavelengthsabsorbedbyCO.,Wavelength(expanded),Intensity,4.7um,COfilledcuvette,N2filledcuvette,Individualabsorptionlines,气体分析仪的原理与应用,GfxSensorConstruction,Thealternatingbeampassesdownthesamplecell,throughthegasbeingmeasuredandontothedetector.,气体分析仪的原理与应用,GfxSensorConstruction,ThedifferenceinthesignallevelwhenthetwocuvettesareintheIRbeamrepresentsonlytheenergyatthosewavelengthsabsorbedbyCO.,气体分析仪的原理与应用,GfxSensorConstruction,ThesignalsforthetwocuvettesarebalancedelectricallysothatwhenthereisnoCOinthesamplegasthetwolevelsarethesame.,气体分析仪的原理与应用,GfxSensorMeasurements,WhenthesamplecontainsnoCOthenthesignalsarebalancedwithnodifference.ThemeasuredCOconcentrationwillbezero.,N2,CO,N2,CO,NoCOingassample.,气体分析仪的原理与应用,GfxSensorMeasurements,WhenthesamplecontainsCOthenthesignalwiththeN2cuvetteisreducedwhilethesignalwiththeCOcuvetteisvirtuallyunchanged.ThedifferencebetweenthesignalsgivestheCOconcentrationinthesamplegas.,N2,CO,N2,CO,NoCOingassample.,N2,CO,N2,CO,Delta,COinthegassample,气体分析仪的原理与应用,GfxSensorMeasurements,WhenthesamplecontainsanothergaslikeCO2thenthesignalwithbothcuvettesisreducedequally.ThedifferenceinthesignalsiszeroThemeasuredCOconcentrationinthesamplegaswillbezero.,N2,CO,N2,CO,NoCOingassample.,N2,CO,N2,CO,Delta,COinthegassample,N2,CO,N2,CO,CO2inthegassample,气体分析仪的原理与应用,GfxSensorMeasurements,Whenthesamplecelliscontaminatedorthesourceintensitychangesthenthesignalwithbothcuvettesisreducedequally.ThedifferenceinthesignalsisstillzeroThemeasuredCOconcentrationinthesamplegaswillbezero.,N2,CO,N2,CO,NoCOingassample.,N2,CO,N2,CO,Delta,COinthegassample,N2,CO,N2,CO,Cellcontaminated,气体分析仪的原理与应用,NO,IRfilterandwatervapourspectra,气体分析仪的原理与应用,Principleofoperation,气体分析仪的原理与应用,ServomexSoftUV*Technology,*SoftUVislowenergyultravioletradiationgreaterthan250nm,气体分析仪的原理与应用,ServomexSoftUltraVioletcell,Filterwheel,UVSource250-900nm(Broadband,hotwirefilament),ChopperMotor,Samplecell,SiliconPhotodiodeDetector,Lens,气体分析仪的原理与应用,Transmission,400,500,600,250,Wavelength(nm),ServomexSoftUV,Forthereferencefilter,anabsorptionbandinanareaofthespectrumwherethereisnoabsorptionisselected.,Forthemeasurementfilter,anabsorptionbandcorrespondingtothetargetgasisselected.,气体分析仪的原理与应用,Whenthereferencefilterisinthebeam,thereisnoabsorptionbythetargetgasinthesample.Thisgivesazeroreading.,ServomexSoftUV,R,气体分析仪的原理与应用,Whenthemeasuringfilterisinthebeam,energyisabsorbedbythetargetgasinthesample.Thisgivesthespanreading.Thedifferencebetweenthezeroandspansignalsisproportionaltotargetgasinthesample.,ServomexSoftUV,R,M,气体分析仪的原理与应用,ServomexPhotometricTechnologies:ReliableStableImmunetoobscurationVibrationresistantSolidstatedetectorGfxoption(superiorselectivityfor