资源描述：
《基于tdlas的大气co2监测技术分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、基于TDLAS的大气CO2监测技术研究关键词：二氧化碳；气体检测；TDLAS；波长调制；二次谐波VI万方数据基于TDLAS的大气CO2监测技术研究StudyonMonitoringTechnologyofAtmosphericCarbonDioxideConcentrationBasedonTDLASAbstractAstechnologyandindustriallevelishigherandhigherinrecentyears,theglobaltemperaturehavebeenincreasinggraduallythatgeneratedaseriesofenvir
2、onmentproblems,includingthemeltingofpolarglacier,landdesertificationandsoon.Consequently,globalwarminghasbecomeoneofthemajorenvironmentproblemshumanconcerned.Furthermore,carbondioxidecausedbydailylifeandindustrialproductiongeneratesgreenhouseeffect,whichisanimportantreasonofglobalwarming.Accor
3、dingly,itisverynecessarytomonitorthecarbondioxideofatmosphere.TunableDiodeLaserAbsorptionSpectroscopy(TDLAS),withfeaturesofhighsensitivity,fastresponseandhighresolution,hasbeenwidelyappliedintheatmospherictracegasmonitoringfield.Accordingtotheprinciplesofspectroscopy,eachmaterialhasitsownchara
4、cteristicabsorptionspectrum.Combiningwiththelightsourceselection,thispaperselecttheabsorptionspectrumnear1572nm.Directabsorptionspectroscopy,modulationspectroscopyandharmonicdetectionarecommonlyusedintheTDLAStechnologytodetectgasconcentration.Inordertoreducetheinterferenceofnoise,thissystemtha
5、tcombineswavelengthmodulationappliedinsemiconductorlaserwithsecondharmonicdetection,canmeasurecarbondioxideconcentrationwithhighaccuracy.ItisintroducedthatthebasicprincipleofmeasuringgasconcentrationbasedonTDLAS,andthetheoryofwavelengthmodulationandsecondharmonicdetectionarederived.Throughthea
6、nalysisofthetheoryofTDLAStechnologymeasuringgasconcentration,thedesignschemeisproposed.Owingtotheeffectofcornerreflector,thelaserwillbebacktolensafteritislaunchedtoatmosphere,thentobereceivedandprocessed.Thissystemconsistsoftransmittingsystem,signalmodulationanddemodulationsystem,receivingsyst
7、emandinformationacquisitionandprocessingVII万方数据基于TDLAS的大气CO2监测技术研究system,thenthekeydeviceselectionisintroducedindetail.Aftercompletingthebuildingofsystem,thesemiconductoristestedtodetermineitsworkingtemperatureandcurrent.Afterthedetermi
