激光剪切干涉準直系統(tǒng)的設(shè)計研究.pdf

1、天津大學碩士學位論文激光剪切干涉準直系統(tǒng)的設(shè)計研究姓名：王文丹申請學位級別：碩士專業(yè)：測試計量技術(shù)及儀器指導教師：趙美蓉林玉池20090501ABSTRACTStraightnessmeasurementiSoneofthebasicitemsinthefieldofgeometricalmeasurement，andalsothebasicofflatness，parallelism，verticality。coaxialityand

2、etcStraightnessmeasurementofrailhassomeuniquecharacterssuchastherequirementsofthelongtraveldistance1argervolumeofdatastrictrealtimerequirementandworkonsiteRecentlythemeasurementusinglaserbeamsasthelinearreferenceshasbeen

3、greatlydevelopmentButtheprecisionofLaseralignmentintestingoflongtracehasn’tbeenimprovedformanyyearsBecauseofsomeexistingproblemssuchasbeamdrift，bendingandtheatmosphericperturbation，whichcan’tbeovercomeundercurrenttechnic

4、alconditionsAnewkindofportableIasercollimationsystembasedoninterferencefringeiSdesignedtosolvetheproblemsexistinginthemeasurementoflinearerroroflongrailHavingbeencollimatedandexpandedthelaserbeamincidentstothewedgeshaped

5、plateWhenreflectingonthetwosurfacesofthewedgeshapedplate1aserbeambecometwocoherentbeamswithanangleThesiliconphotocellsareusedtodetecttheinterferencefringe’Sappearanceinthecrossedregionofthetwobeams，andtheoutputiSprocesse

6、dbythemeasuringcircuittoacquirethesurfaceminuteangleofthemeasuredtrackThemeasureddatacanbecalculatedbycomputertogetrailstraightnessAccordingtothemeasuringrequirements，analysisoftheprincipleandcollectivitydesignofthelaser

7、interferencecollimationsystemaremadeincludingwholestructuredesignofthecollimatedlaserinterferometersystemthedesignandcalculateofparametersforlightsourceandoptoelectroniccomponents，themechanicalstructuraldesignofthesystem

8、，signalanalysisandsignalprocessingprogramsetcForthecharacteristicsofthesystem～thephotoelectricsignaliSweakandtheinterferencesarelargeaccomplishedthedesignanddebugofthesignaIprocessingcircuitsTheinterferencefringesignalpr

9、ocessingmethodsiSstudiedThedataprocessingsoftwarestructure，mechanismforsignalconditioningandthestraightnessmeasurementalgorithmaredesignedUseVCtOachievetherealtimecomputationandstorageoftherelativeheightdifferenceofthegu

10、idesurface，bythehardwareplatformofWINDOWSWiththerealtimecalculationofphasedifferencesbetweenadjacentsignals1aserbeams’collimationcalibrationandequipments’assemblingadiustingarewellsimplifiedAdjustthesignalgainaccordingto

11、theamplitude，whichrealizingthelongdistancemeasurementElectronicdeviceswithminiaturizationandIowerpowerconsumptionareusedinthemeasurementcircuit，andLithiumBatteriesareusedasthepowerofthemeasurementcircuit，whichmakethesyst

12、emportableandconvenientoperationTheexperimentsofcalibrationtest，stabilitytestrepeatabilitytest1ineartestanti—disturbancetestandrealtestingoflongtracehavebeendoneTheresultsindicatethatthesystemshasstablerunningpropertythe