资源描述：
《基于数字相移条纹投影技术的三维测量系统及其误差分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、湖南大学硕士学位论文基于数字相移条纹投影技术的三维测量系统及其误差分析姓名：梁杰夫申请学位级别：硕士专业：机械电子工程指导教师：王文格20050428基于数字相移条纹投影技术的三维测量系统和误差分析ABSTRACTWiththedevelopmentofscienceandindustrialtechnology,3Dmeasurementtechniquesareincreasinglyimportantinproductionforautomation,qualitycontrol,machinevision,reversale
2、ngineering,CAD/CAMandbiomedicalengineering,etc.Traditionalcontactmeasurementtechniqueshavelotsofflaws,suchasmeasurementforcecompanyingwithmeasurementprocess,beingtime-consuming,needingcompensationforradiusofthetesthead,andbeingunabletomeasureelasticorfragilematerial,an
3、dsoon.Therefore,itcannotmeetdemandsofthedevelopmentofmodernindustry.Howeveritisanimportantbutdifficultproblemtodevelopatechnologywhichcanbeusedtomeasure3Dsurfaceofobjectnicelyandrapidly.Akindofnew-typenon-contact3Dmeasurementsystemisstudiedandthebasicprincipleof3Dmeasu
4、rementmethodbasedondigitalphase-shiftingandfringeprojectiontechniquesisillustratedinthispaper.Totheproblemsinthetraditionalsystem,thestructureisimprovedtoremoveparalleldegreerequiredforbettermaneuverabilityinsystemcalibrationandhigherprecisionofmeasurement.Simultaneity
5、，thispaperanalysesthephaseunwrapping,anditispresenttostudyanewalgorithmforphaseunwrappingbasedreliability.Mainerrorsourcesareanalyzedanddifferentphase-shiftingalgorithmsarecomparedinthispaper.Toreducetheeffectofthenonlinearityerror,anewphase-shiftingalgorithmcalleddoub
6、le-4stepalgorithmisdeveloped.Anerrorcompensationalgorithmisusetoreducetheotherremainingerrorsbycompensatingfortheerrorsofthemeasuredcoordinatesdirectly.Itisfinishedtodesignhardwareandsoftwareofanewsysteminthispaper.Systemstructureandtechnicaldetailsinvideocapturearestu
7、died.BasedonWindowsplatform,arealtimevideocapturesystemisdevelopedbyaccessingtobufferdirectly.ItcanSatisfytheneedofrealtimevisionsystemwell．Bytheexperimentaldataprocessing,someresultsincludingplaneandsurfacemeasurementarepresented.Itprovethatdouble-4stepalgorithmcanimp
8、rovetheprecisionofmeasuring.Keywords：3Dshapemeasurement；Digitalshiftingphasefringeprojection；Double-4-stepphaseshifti
