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1、中南大學(xué)碩士學(xué)位論文基于CMM復(fù)雜曲面測(cè)量的采樣方法及測(cè)頭半徑補(bǔ)償研究姓名:廖菲申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):機(jī)械制造及其自動(dòng)化指導(dǎo)教師:曾韜20090501插值的采樣方法和基于四點(diǎn)共球理論的測(cè)頭半徑補(bǔ)償方法實(shí)現(xiàn)了對(duì)自由曲面的測(cè)量?jī)?yōu)化,滿足了使用要求,有一定的實(shí)際應(yīng)用價(jià)值。關(guān)鍵詞:三坐標(biāo)測(cè)量機(jī),測(cè)量規(guī)劃,采樣方法,測(cè)頭半徑補(bǔ)償ABSTRACTThemeasuringproblemofcomplexsamplesexistswidelyinthefieldofautomobilemanufactureandmolding.Itisdifficultt
2、omeasurepartswithhighprecisioneffectivelyandgetageneraldetectionmethodanddataprocessingtechnology.Fortheexistingmeasuringtechniquehascertainlimitsandshortages,thisthesismainlyperformstheresearchofmeasurementplanningofcurvedsurfaceandoptimizationofthemeasuringpath.Thegasolin
3、eshellismeasuredbyusingGLOBALSTATUS575movingbridgetypeCMM(coordinatemeasuringmachine)ofHexagonandoptimizingofthemeasuringpathandcompensatingoftheproberadiusareinvestigatedsubsequently.Themainworksandresultsare-"1.Thehistoryofthemeasuringtechnologiesoffree—formsurfaceissurve
4、yedinthefirstpartofthisthesis.Theshortcomingsofthepresentmeasuringtechnologies,suchasdistributingpoints,overmanymeasuringpointsandcompensatingprecisionrapidly,areanalyzed.2.Thecubicsplinepredictionmethodisproposedbasedonthecomparingwiththepresentedconventionalsamplingmethod
5、s.AnanimateexampleisillustratedsubsequentlyandthepredictionmethodisprovedtobevalidinsimulationofMatlab.3.Basedontheanalysisofconventionalsamplingmethods,a,cubicsplinepredictionmethodbasedonthespecificpropertiesofcurvedsurfaceisdeveloped.Throughcomparingthepredictionaccuracy
6、andcomputationofcubicsplinepredictionmethodandpredictionmethod,theformerhasbeenprovedtoimprovethemeasurementefficiencyandaccuracy.4.Theexpriementofthemeasuringplanningispreformed.ThecloudpointisusedtoreconstructbyImageware.5.Themethodbasedon“four-pointbuildasphere’’theoryis
7、proposedbasedonpresenttwo.dimensionalcompensationandthree—dimensionalcompensationmethods.1116·Thetwocompensatingmethods,micro.spherecompensatingandsphnecompensatingmethodareusedtoanalyzethedatafromthegasolineshellexperiment.Theresultsshowthattheerrorsbymicro。spherecompensat
8、ingmethodiSfarlowerthanthat’Sobtainedbyusingsplinecompensatingmethod,andthemainlyr