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ID:33122772
大小:14.66 MB
页数:65页
时间:2019-02-20
《基于摄像机旋转的双目立体视觉在接触线覆冰检测中的应用》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、万方数据ABSTRACTAstherailwaystretchestothecoldandremoteareasinourcountry,andthefrequencyofthebadweather,theeffectsoficecoatingoncontactwiresisgrowing.Theiceoncontactwilesnotonlyaffectsthenormaloperationofthetrain,butalsoevenleadstoseriousaccidents,themainhazardsare:Theiceshelloncontactwiresmake
2、sthepantographcannottakeelectricity;Theiceoncontactwiresiseasytobecomeicicleandscratchespantograph,increasingthewearofpantograph;Aftericecoating,duetothelineardensityincreasing,thewavespeedandthequalityofabsorptioncurrentreduced;Wiresgallopbecauseofthewindloadandiceweightbeyondthedesignvalu
3、e;Electricarcisproducedbetweenthepantographandwires,andtheinstantaneoushightemperaturebumsthepantographandwires.Inviewofthelackofresearchonicecoatingoncontactwires,andthedeficiencyofthecurrentmethods,thispaperputforwardsakindofimagemonitoringmethodbasedonbinocularstereovisionforicecoatingon
4、linemonitoringoncontactwires.First,studythecalibrationmethodofexternalparametersforthecamera诵thpan-tilt-devicerotatingtoanyposition,achievethegoalofbinocularstereovision,solvetheproblemsoftraditionaltechniquethattheintrinsicparametersareinconsistent,needtore-calibrationaftercameramoving,les
5、smonitoringrange,needtosetuptwocameras.Second,intermsofextractingfeaturepoints,thisarticleadoptsthealgorithmofwaveletabsolutemaximumvaluecombined、析tIledgegrowthundermultiplethreshold,andmathematicalmorphologytoextractprofileofcontactwireswhichissinglepixelandcontinuous.Thismethodisadaptivea
6、ndhasgoodextractioneffectundercomplexbackground.Third,intermsoffeaturematching,thefeaturepointscanbedividedintotwotypes.Byusingepipolarconstraintandtherelationshipbetweenthefeaturepoints,Canimprovethematchingaccuracyandreducethetimecomplexity.TheimprovedmethodofbinocularstereovisionCanrebui
7、ldthe3dviewofcontactwiresandcalculatetheicethicknessandthelengthoficiclethroughacertainalgorithm.Applicationofthisalgorithmtoanalysismultiplesetsofimages,thepracticalresultsshowthatthemethodCanaccuratelycalculatetheicethicknessandthelengthoficicle.Thepre
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