基于投影条纹的物体三维形貌精密测量方法的研究

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1、分类号UDC工学硕士学位论文学号密级基于投影条纹的物体三维形貌精密测量方法的研究硕士生姓名李健兵学科专业航空宇航科学与技术研究指导方向教师人机与环境工程雷志辉副教授国防科学技术大学研究生院二oo四年十一月国防科学技术大学研究生院学位论文AbstractOptical3-Dprofilometryhasbeenwidelyusedformachinevision，intelligentrobotscontrol，industrymonitoring，biomedicine，etc．Severalmethodsofthose，suchasmoir6te

2、chnique，PhaseMeasuringProfilometry(PMP)，FourierTransformationProfilometry(FTP)havebeenexhaustivelystudiedtheseyears．Beacauseofitshigheraccuracy,PhaseMeasuringProfilometryisoneofthemostimportantmethods．ThereareseveralhotissuesinthePMPresearch：unwrappingthephasereliablymadcalibr

3、atingthesystemaccurately．Mydissertationfocusesonthesetwoissues，andthemajorworkdonecanbesummarizedasfollows：1，Amethodthatusedoublespacialfrequencyfringestounwrapthephasefullautomaticllyhasbeendeduced．Thismethod，byusingthemoir6charactersofthetwofringes，caneasilyacquiretheactualp

4、hasefromthemain—valuephasewhichisobtainedbyphase-shiftingmethod．2．Amethodthatemploystheordersofprojectedfringesasaxisestoestablishfringe-order-coordinateispresented．Itmakesthedescriptionofthefringeordersverydirectandsimple．Inthefringe-order-coordinate，Bayesestimationmethodisus

5、edtoamendthephase(orfringeorders)，andagoodresultisobtained．3．Amethodthatisusedtoamendthephaseofreferenceplane(orcalibrationplane)hasbeenputforward，Withthephaseworkedoutbyphase—shiftingmethodandunwrappingmethod，itisveryeasytogettherelationshipbetweenthepositionand曲aseofapoint，w

6、hichcanbeusedtoamendthephaseofreferenceplane(orcalibrationplane)．Aftertheamending，thephaseerrorcanbelargelyreduced．4．Anewcalibrationmethodhasbeenusedtogethigheraccuracy．Thismethodisdifferentfromgeneralcalibrationmethodswhichalwaysgettheactualphysicalparametersofsystem．Howener,

7、thecombinationoftheseparametersiscalibratedinourmethod，whichisconvenientandhasbetteraccuracy．5．Amethodthatisusedtocreatsimulationalimageshasbeendeveloped．Inthismethod，agoodmanyoffactorswhichmayinfluencetheimage，suchasreflectivityandprojectionangle，havebeendiscussedKeyWords：pha

8、semeasuringprof'dometry(PMP)，moir6fringe，Bayesestimation，syst