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

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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