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,,,,,(,300072):,,,,,,,,,,:;;;;:TG115.28:A:100026656(2001)0920372203NON2CONTACTNONDESTRUCTIVEINSPECTIONMETHODFOR32DCURVEDSURFACESBASEDONVISIONDETECTIONTECHNOLOGYCHENMing2zhou,WANGZhong,KOUXin2yu,ZHANGHong2tao,YOUQiang,YESheng2hua(StateKeyLaboratoryofPrecisionMeasuringTechnologyandInstruments,TianjinUniversity,Tianjin300072,China)Abstract:Irregularfree2formiswidelyusedinmechanicalengineering.Ithasbeenahotspottocarryoutnon2contactnondestructiveinspectionofthe32Dcurvedsurfacesinrecentyears.Traditionalcontactmethodwillhurtthesurfacesbe2causeofthecontactprobe,andalsoitcannotmeasureelasticobject.Besides,thecontactmethodisineffective.Anewnon2contactnondestructivemethodfor32Dcurvedsurfacesbasedonactivebinocularsensingtechnologyispresented.Spe2cialstructuredlightsareprojectedontotheobjectandbyreceivingreturnedinformation,free2form32Dcoordinatesaregotefficiently.Thenon2contactprobecanavoidcontactmeasuringforce,soitcanbeusedforon2siteinspection.Themathe2maticalmodelandcomputersimulationexperimentsareprovidedtotesttheresults.Itisprovedthatthemethodcanreal2izepreciseon2site32Dinspectionofcurvedsurfaces.Keywords:Nondestructivetesting;32Dcurvedsurface;Visiontechnology;Sensor;Computersimulation,,,,:2000211222,,,,,,27323920019NDTVol.23No.9Sep.2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,[1],,,1a,bOaxayazaObxbybzb,OIaXaYaOIbXbYb(1),fafb,(),OaxayazaObxbybzbMabPa,b[xa,ya,za]T[xb,yb,zb]T,xbybzb=Mabxayaza1=[R,T]xayaza1=R1R2R3TxR4R5R6TyR7R8R9Tzxayaza1(1)MabMab=[R,T]R,[2,3]R=R1R2R3R4R5R6R7R8R9T,[2,3]1T=TXTYTzMab,[4,5],(1),[Xa,Yb,1],0[X,Y]TXaYa1=fa000fa0001xayazaXbYb1=fb000fb0001xbybzb(2)(1)(2)za=TzfaXb-TxfafbHxa=Xafazaya=Yafaza(3)H=R1fbXa+R2fbYa+R3fafb-R7XaXb-R8XbYa-R9faXb,,(2),,,,,[xa,ya,za]T,,,2(3),B,zazb2,Oz2373:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3OaOb,Mab(B,)Mab=cos20sin2-Bcos0100-sin20cos2Bsin(4),,,fa=fb=25mm,,z=600+502-y2(-50x,y50)500mm,22.5,,,B=2mm,[X,Y]((2)),BMab(B,)(3),,1,B,x,yz,1B=500mm,=22.5xyzxyzxyz-50.000-50.000600.000-50.200-50.200602.400-0.2-0.2002.400-50.000-48.000614.000-50.200-48.192616.456-0.2-0.1922.456-50.000-46.000619.596-50.200-46.184622.074-0.2-0.1842.478-50.000-44.000623.749-50.200-44.176626.244-0.2-0.1762.495-50.000-42.000627.129-50.200-42.168629.638-0.2-0.1682.509-50.000-40.000630.000-50.200-40.160632.520-0.2-0.1602.520-50.000-38.000632.496-50.200-38.152635.026-0.2-0.1522.530-50.000-36.000634.699-50.200-36.144637.237-0.2-0.1442.538-50.000-34.000636.661-50.200-34.136639.207-0.2-0.1362.546-50.000-32.000638.419-50.200-32.128640.972-0.2-0.1282.553-50.000-30.000640.000-50.200-30.120642.560-0.2-0.1202.560-50.000-28.000641.425-50.200-28.112643.990-0.2-0.1122.565-50.000-26.000642.708-50.200-26.104645.279-0.2-0.1042.571-50.000-24.000643.863-50.200-24.096646.439-0.2-0.0962.576-50.000-22.000644.900-50.200-22.088647.479-0.2-0.0882.579-50.000-20.000645.826-50.200-20.080648.409-0.2-0.0802.583-50.000-18.000646.648-50.200-18.072649.234-0.2-0.0722.586-50.000-16.000647.371-50.200-16.064649.960-0.2-0.0642.589-50.000-14.000648.000-50.200-14.056650.592-0.2-0.0562.592-50.000-12.000648.539-50.200-12.048651.133-0.2-0.0482.594-50.000-10.000648.990-50.200-10.040651.586-0.2-0.0402.596-50.000-8.000649.356-50.200-8.032651.953-0.2-0.0322.597-50.000-6.000649.639-50.200-6.024652.237-0.2-0.0242.598-50.000-4.000649.840-50.200-4.016652.439-0.2-0.0162.599-50.000-2.000649.960-50.200-2.008652.560-0.2-0.0082.600(413)473:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,(2),,,(3),,,,,[13],,,:[1].[J].,1998,20(2):59-60.[2],,.[J].,1998,20(1):29-30.[3].[M].:,1987.5,8,9,111.[4]GB113451989,[S].[5],.[J].,1999,21(1):15.[6].[J].,1995,17(4):113.[7]CB/T35591993,[S].[8].[J].,1998,20(5):134.[9],,.[J].,1999,26(3):37.[10].[M].:,1980.153.[11].[J].,1995,17(9):258,259,261.[12].X[J].,1997,19(7):203.[13],,.[J].,1999,21(4):175.(374),,3,,:[1],.[M].:,1996.[2].[M].:,2000.181.[3],.[J].,1999,(4):96-100.[4].ADC[D].:,1992.[5].[D].:,1994.(390),,,,,,,,,,!:[1].[M].:,1999.[2],.[J].,1994,16(1):7-8.[3]CECS02:1988,[S].314:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.