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1、TunnellingandUndergroundSpaceTechnology40(2014)16–21ContentslistsavailableatScienceDirectTunnellingandUndergroundSpaceTechnologyjournalhomepage:www.elsevier.com/locate/tustPerformanceassessmentofvideo-basedfiredetectionsystemintunnelenvironmenta,⇑bbcChen-WeiChiu,TonyLu,Hao-TingChao,Chi-MinShuaDepar
2、tmentofFireSafety,NationalTaiwanPoliceCollege,Taipei11696,Taiwan,ROCbIndustrialTechnologyResearchInstitute,Hsinchu30075,Taiwan,ROCcDepartmentofSafety,Health,andEnvironmentalEngineering,NationalYunlinUniversityofScienceandTechnology,Yunlin64002,Taiwan,ROCarticleinfoabstractArticlehistory:Comparedto
3、tunnelsusedforothermodesoftransportation,firesafetydesignproblemsinroadtunnelsReceived15April2013aremorechallengingbecauseofhigh-speedwindenvironmentalimpact.Avideo-basedfiredetectionReceivedinrevisedform29August2013system(VFDS)appliesinventivemathematicalcalculationsandsophisticatedcomputermodelsto
4、Accepted5September2013analyzeandtacklereal-timevideosignalsstatisticallyandintelligently.VFDS-basedtemporalflickerAvailableonline15October2013modelingofflamesandwavelet-basedcontourmodelingapproachesareusedasweakclassifiers.Exper-imentalresultshaveshownthatfalsealarmsissuedbyearliermethodscanbesignifi
5、cantlyreducedbyKeywords:usingseparateflameandnon-flamemovingpixels.WheneverthesystemdetectsfireorsmokeunderDesignproblemswindornowindenvironment,theVFDSserverinitiatesactions,includingvisualandaudiblealarms,RoadtunnelsEnvironmentalimpactalarmmessages,andvideorecording.Video-basedfiredetectionsystem(VF
6、DS)CrownCopyrightÓ2013PublishedbyElsevierLtd.Allrightsreserved.Computermodels1.Introductionprocessing,itwouldbeveryconvenientandcouldpossiblymini-mizedamage,evenwhenpersonnelarenotmonitoringCCTV.FireToevaluateandcompareperformancesofdifferentventilationandsmokedetectioninatunnelisdifferentfromfore
7、stfiredetec-systems,airflowinducedbyanaccidentalvehicularfireinatunneltionaselementssuchascars,tunnellights,andotherlightsourcesissimulatedusingCFD(LiandChow,2003).Smokemovementinaaretypicallynotrelevantinaforestenv
