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Researchonlidarvisibilitymeasurementsystemforairport.pdf

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Researchonlidarvisibilitymeasurement systemforairport XinglongXiongShuaiFeng TianjinKeyLabforAdvancedSignalProcessingEngineeringtechnicaltrainingcenter CivilAviationUniversityofChinaCivilAviationUniversityofChina Tianjin,ChinaTianjin,China xx_long@126.comfengshuai2004@126.com LihuiJiangZiboZhuang TianjinKeyLabforAdvancedSignalProcessingInternationalflightinstitute CivilAviationUniversityofChinaCivilAviationUniversityofChina Tianjin,ChinaTianjin,China jlhhit@163.comzhuangzibo@126.com Abstract—Aimingatthedifficultyinmeasuringtheslant visibilityincivilaviationairport,asolutionoflidarvisibilityII.㋏㒳݇䬂ᡔᴃ measurementsystemisproposed.Semiconductorlaserwithlow pulseenergyandhighpulserepeatfrequencywhilephotodiodeA.㛑㾕ᑺ⌟䞣ॳ⧚ detectorwiththecharacteristicsoflownoiseandhighquanta efficiencyhavebeenadopted,whichensurethestabilityof˄1˅∈ᑇ㛑㾕ᑺᮍ⿟Ў˖ 112.996 systemworks.Byusingtwoscanningmodes,theflexibilityandV==ln(1) themeasurementaccuracyofthesystemareimproved.hσσ ww0.05 Experimentalresultsshowthatthemeasurementaccuracyofthe systemisbetterthan20%,whichsatisfytherequirementsofᓣЁ˖VhЎ∈ᑇ㛑㾕ᑺ˗ıwЎ໻⇨⍜ܝ㋏᭄DŽ InternationalCivilAviationOrganization.˄2˅᭰⿟㛑㾕ᑺᮍ⿟ㅔ࣪Ў[2]˖ 3 V=(2) Keywords-lidar;slantvisibility;extinctioncoefficientsσ p ᓣЁ˖ıpᰃ᭰⿟ᮍ৥ऩԡ䎱⾏Ϟⱘ⍜ܝ㋏᭄DŽ I.ᓩ㿔 ˖䳋䖒ᮍ⿟ˈབϟܝ▔ࡽ׳㛑㾕ᑺডⓨ䳔㽕 ηλcAτr (Ⳃࠡˈ೑ݙ⇥㟾Փ⫼ⱘᴎഎ䎥䘧㛑㾕ᑺ⌟䞣Ҿ఼ˈাNr()=−PYr()βσ()exp(2r()rdr)Δr(3 hc02r2³ 㛑⌟䞣∈ᑇ㛑㾕ᑺˈϡ㛑⌟䞣᭰⿟㛑㾕ᑺDŽ▔ܝ䳋䖒᮶ৃ0 ᄤ᭄˗ηᰃ᥶⌟఼ⱘ䞣ᄤᬜ⬉ܝ䞣∈ᑇ㛑㾕ᑺг㛑⌟䞣᭰⿟㛑㾕ᑺˈԚ݊ᄬ೼ҹϟϡ䎇ᓣЁˈN(r)ᰃಲ⊶ֵো⌟ [1]˖˄1˅㋏㒳໡ᴖǃ៤ᴀ催ǃ䞡䞣䞡ǃԧ⿃໻˗˄2˅⥛˗Ȝ▔ܝ⊶䭓˗hᰃ᱂ᳫܟᐌ᭄˗cᰃܝ䗳˗P0ᰃ▔ܝ 㛝ކ▔ܝᇍ᪡԰Ҏਬⴐ⴯ϡᅝܼ˗˄3˅䭓ᯊ䯈䖲㓁䖤㸠㛝ކথᇘࡳ⥛˗IJᰃ▔ܝ㛝ކᆑᑺ˗Aᰃ᥹ᬊᳯ䖰䬰ⱘ᳝ ⱘৃ䴴ᗻ䕗ᏂDŽᇍℸᴀ᭛ᦤߎϔ⾡෎Ѣ▔ܝ䳋䖒ᡔᴃⱘ㛑ᬜ䴶⿃˗Y(r)ᰃ㋏㒳ⱘ޴ԩ䞡঴಴ᄤ˗ȕ(r)ᰃr໘ⱘ໻⇨ৢ 㾕ᑺ⌟䞣㋏㒳ᅲ⦄ᮍḜ˖䞛⫼Ԣ㛝ކ㛑䞣ǃ催㛝ކ䞡໡乥৥ᬷᇘ㋏᭄˗ı(r)ᰃr໘ⱘ໻⇨⍜ܝ㋏᭄˗Δrᰃ䎱⾏ߚ䕼 ⥛ⱘᇣൟܼ೎࣪ञᇐԧ▔ܝ఼԰Ўܝ⑤ˈ݊Ԣ㛑䞣䕧ߎᇍ⥛DŽ ˈ᭄㋏ܝ೼∈ᑇᮍ৥Ϟˈ㋏㒳䞛⫼᭰⥛⊩[3]ডⓨ⍜ކ䞡໡乥⥛๲ࡴњऩԡᯊ䯈ݙⱘ㛝ކҎԧ᮴ॅᆇˈ㗠催㛝 ㌃䅵᭄Ⳃˈᦤ催њᑇഛথᇘࡳ⥛˗䞛⫼Ԣాໄǃ催䞣ᄤᬜ߽⫼ᓣ(1)䅵ㅫ∈ᑇ㛑㾕ᑺDŽ೼᭰⿟ᮍ৥໻⇨㛑㾕ᑺ䕗催 Ѡᵕㅵ῵ഫ԰Ўֵো᥶ᯊ˄㛑㾕ᑺ໻Ѣ2km˅ˈ䞛⫼Fernald[4]⊩ডⓨ᭰⿟ᮍ৥⬉ܝᄤ䅵᭄ⱘ䲾ዽܝǃৃᅲ⦄ऩ⥛ ᭄ıpˈ㗠೼᭰⿟㛑㾕ᑺᇣѢ2km㋏ܝ఼ˈҹ⒵䎇ᖂᔅֵোⱘẔ⌟䳔∖˗䞛⫼῵ഫ࣪䆒䅵㒧ऩԡ䎱⾏Ϟⱘ⍜⌟ থᇘǃֵো᥹ᬊǃ᭄᥂໘⧚Ўϔԧˈ๲ᯊˈ䞛⫼Ѡӄ㾦⊩ডⓨıpˈ✊ৢݡ߽⫼ᓣ(2)䅵ㅫ᭰⿟㛑ܝ▔ᵘˈՓ㋏㒳䲚 ᔎњ㋏㒳ⱘ֓ᨎᗻ˗䞛⫼ϸ⾡ৃ䗝ⱘ᥶⌟ᠿᦣᮍᓣˈᦤ催㾕ᑺⱘᑇഛؐVsDŽ њ㋏㒳⌟䞣ⱘ♉⌏ᗻঞ⌟䞣㊒ᑺDŽ B.㋏㒳㒧ᵘ ೒1ᰃ㛑㾕ᑺ⌟䞣㋏㒳ⱘ㒧ᵘ⼎