基于高精度激光扫描仪的路面检测系统.pdf

《基于高精度激光扫描仪的路面检测系统.pdf》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、Roadsurfaceinspectionusinglaserscannersadaptedforthehighprecision3Dmeasurementsoflargeflatsurfaces.JohnLaurent,MarioTalbot,MichelDoucetNationalOpticsInstituteAbstractInthispaperanopticalconfigurationbasedonauto-synchronizedlaserscanningisproposedforthe30measurementofroadsurjaces.Theadvantagesofthi

2、stechniqueoverclassicaltriangulationmethodsarez=dfexposed.Theroadinspectionsystemdevelopedattheftan0+pNationalOpticsInstitute(NOI)usingthistypeoflasertelemetryisalsopresented.Thissystemusestwoauto-synchronizedlaserscannersinordertoobtaintransverse30andintensityprofilesofroadsurfaces.Alsodescribeda

3、resimplealgorithmswhichdetectandmeasureruttingandFigure1.Triangulation-basedtelemetryprinciple.cruckingconditions.Resultsincluderutmeasurementsonboihrealandsimulated30roadprofilesandacrackmapEquation1,see[2],describestheopticalgainassociatedofanactualpavementsection.withtriangulation-basedsensors;

4、&correspondstoachangeinobject-sensordistanceandApisthe1.IntroductioncorrespondingdisplacementofthelaserspotimageontheRoadinspectionisaverydemandinglargeflatsurfacedetector.Foragivendetector,thesensitivityofthesensorinspectionapplication.Scanningroadsurfacesrequiresdependsonthefocallengthfofthecoll

5、ectionoptics,thecoveringthefull4-meterwidthofatypicalhighwayseparationdbetweenthelaserprojectorandthedetectorcorridorwithsub-millimeterverticalprecision.Eachyear,andtheobject-sensordistancez.Increasingthelaser-substantialamountsofmoneyarespentfortheinspectionofdetectorseparationdinordertoincreaset

6、hesensitivityofroadnetworksdemonstratingtheneedforanautomaticandthesensorisoftennotaviablealternativebecauseofob-jectiveassessmentofroadpavementconditions.Inspitestabilityreasons,limitstotheallowablesensordimensionsoftechnologicalprogress,pavementruttingandcrackandbecauseshadoweffectsbecomeimporta

7、ntasdisdetectionareoftenstillmeasuredmanually.Fortheseincreased.reasons,Quebec’sMinistryofTransportationmandatedNO1todeveloparoadinspectionsystem.Withclassicalapproachestolasertriangulation,suchastheuseofavideoca