立体视觉在航空发动机无损检测中的应用

,(,210016)(,100710):,,,,(RCM)(NDE),:;;;;;:TG115.28:A:100026656(2003)0520229205APPLICATIONOFSTEREOVISIONTONONDESTRUCTIVETESTINGOFAERONAUTICENGINEYUHui,ZUOHong2fu(CivilAviationCollege,NanjingUniversityofAeronautics&Astronautics,Nanjing210016,China)HUANGChuan2qi(DepartmentofScience,Technology&Education,CivilAviationAdministrationofChina,Beijing100710,China)Abstract:Endoscopyiswidelyappliedinpracticalfaultdiagnosisofaeronauticengines.Astraditionalendoscopyhasthelimitationsofincapableofquantitativemeasurementandlowaccessibilityininspection,stereovisionhasbeencombinedwithen2doscopyinsoftwareandhardware.Anovelengineendoscopicimageanalysissystembasedonstereovisionhasbeendevelopedwiththefunctionsofimagedisplay,depthmeasurementand3Dreconstruction.Thesystemhaspromotedthedevelopmentofnon2destructivetesting(NDT)ofaeronauticenginesinreliablecapabilitymaintenance(RCM)andhasdistinctsignificanceinimprovingenginefaultdiagnosisandforecast.Keywords:Nondestructivetesting;Stereovision;Engine;Faultdiagnosis;Endoscopy;Imageanalysissystem,(NDT),NDT,,/NDT(NDE),,,/[1]NDENDT,:2002201224,19891999,37.9%,60%,,,2,[2],,,,92225520035NDTVol.25No.5May2003©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,(RCM),NDTNDE,[2]NDT,,Olympus,,,,,NDERCM1CCD(),,,,,,,,,OlympusIV6C6,,,,22070,Marr,,,(),,()[3],,,,,,1,,,CCD,,,,[4]1,,,Olympus,IV6C6IV8C6,,,,NDT,OlympusIV6C6,,032:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.33.1()CCD(CPU),2(,),,OlympusIV6C6,,2,(),,CCD,CCD,,,A/D,,CCD,60,760mm,6.1mm,38mmCCD,f,CCD3.2Windows95/98/NT,,,,3,3.2.1,,,3,,,[4],X=x+k1r2Y=y+k2r2(1)X,Yx,yr2=x2+y2(1),xy,,,,b,3.2.2CCD,CCD,CCD,CCDCCD,,,CCD,CCDfbCCD,fb,fb[6],(4),Xw=dxl+xr21DYw=dyl+yr21DZw=df1D(2)Xw,Yw,Zw132:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.4xl,ylxr,yrDD=xl-xr,LMN,(xlM,ylM),(xrM,yrM)(xlN,ylN),(xrN,yrN),DMDN,f,b=2LP(3)P=xlM+xrMDM-xlN+xrNDN2+ylM+yrMDM-ylN+yrNDN2+4f21DM-1DN23.2.3,,,,,,[4],[5],,,,,;,,,(),3.2.4,,(4)fd,,(xl,yl)(xr,yr),P(Xw,Yw,Zw),(2),(2),,,(),222,,OpenGLMatlab,,,,4,,,,640480,200400,,5,,,(),0.034566mm,6,,232:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.565,,,,,,,,,,:[1].[DB/OL].,2001.[2],,,.[A].[C].:2001.611-617.[3]MarrD.Vision[Z].WHFreemanandCompany,1982.[4].[M].:,1998.[5],.[M].:,1998.[6]TsaiRY.Aversatilecameracalibrationtechniqueforhigh2accuracy3Dmachinevisionmetrologyusingoff2theshelfTVcameraandlenses[J].IEEEJournalofRoboticsandAu2tomation,1987,3(4):323-344.GB/T186942002GB/T188522002GB/T188512002,,2002,1:2:,,,,,2003,,,:100604,:200437,:[phone],:[phone],E2mail:[e-mail],:()332:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.