隧道结构轮廓快速定位与识别分析-(6234)

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1、西南交通大学硕士研究生学位论文第1I页AbstractWiththerapiddevelopmentofhigh—speedrailway,theratiooftunnellineisbulging，andlatediseasedetectionisincreasinglyimportantaftertheconstructionhavingbeencompleted．Tunnelsectiondeformationdetectionisofthetoppriorityofforthetunneldetection．Andtraditionalde

2、tectionmethodsoftunnelprofileobviouslydoesnotmeetthemuchtestingneeds，SOrapiddetectionmethodoftunnelcontourisurgent．Sothisthesisproposesacross-sectionmeasurementprogramwhichinstallslaserrangefindersensorswithring—directionbutnotequidistantinthiscontext，combined、)l，itllthealread

3、ydetectionmethodsoftunnelsection,itisafast，simpleandeconomicdetectionprogramforttmnelsectiondetection．ThemainworkiSasfollows：(1)Proposesapositioningoftunnelcontourandmeasurementsystemstart-stopmethod．tunnelcontourpositioningfixesmileagepositioning谢廿lRFIDassisted，measurementsys

4、temstart-stopisdeterminedbysettingelectronictagtheintheentranceoftunnel、endoftunneltocorrectingmileageposition．(2)Studiesthelayoutofthelaserrangingsensors，proposesamethodoftunnelstructuresurfacedetectionusingcombinedcalibrationwithcameraandlaserdistancesensor,combinedcalibrati

5、onwithcalTleraandlaserrangefmdercamerasensorrestorescameradepthinformation．(3)Consideringtosectionfeaturesoftunnelstructure，proposescubicB—splinefitsthetunnelprofileandsurface，thetunnelsectioncontourfitting，cubicB-splinefitsstraightwalltypetunnel，cubicsplinefitsarctunnel．Studi

6、esOiltheidentificationoftannelsection，whichusesprimitiverecognitionalgorithmbasedoncurvaturedifference，andproposesthesecondadjustmentalgorithmofthefeaturepointsforthearCoutline．Throughcontrolpointsinversefortunnelthree—dimensionalcontourdatapoints，three—dimensionaltunnelisreco

7、nstructedbybi—cubicB-splinecurves，whileextractingthesectiondataspecified，asareferencesectionforcontourdeformation，avoidingthetroublescausedbytraditionalsectionmeasurementmethodswhosesectionneedtObelocatedorlabeled．ThisthesisgivestheJointcalibrationexpressionofCCDcamerasandlase

8、rrangesensors．Post-processingalgorithmofmeasurementdataaretes