基于正交混頻技術(shù)的相位式激光測距儀設(shè)計.pdf

1、天津大學(xué)碩士學(xué)位論文基于正交混頻技術(shù)的相位式激光測距儀設(shè)計姓名：劉邈申請學(xué)位級別：碩士專業(yè)：儀器科學(xué)與技術(shù)指導(dǎo)教師：楊學(xué)友201112ABSTRACTAbstract：Laserrangefinderhasbecomeakindofregularmeasuringinstrumentsindailyworks，industrialproductionandscientificresearchinrecentyearsBecauseofi

2、tsnon—contactmeasurementandthereferencetraceabletothespeedoflight，itattractsSOmuchattentionEvenifmatureproductsexistinmarket，theimprovementsofthemarereallyfrequentlyManycompaniesdevotethemselvesinresearchingandimprovingp

3、ortableandindustriallaserrangefindingtechnology，especiallythePhaseshiftlaserrangefinderwhichhasbothconsiderableaccuracyandworkingrangeToimprovethecurrentphaseofthelaserrangingsystem，thedefects，suchashighcost，complexity，d

4、ifficulttoeliminatesystematicerrors，mustbeanalyzedAinnovationschemebasedonquadraturemodulationisproposedtocorrectallthedefectsByanalyzingthestructureofthesystem，whyquadraturemixinglaserrangingsystemissuperiortotraditiona

5、llaserrangingsystemisexplainedindetailsSubsequently，theoverallsystemarchitectureandrequirementsaredeterminedAfterdeterminethewholedemand，performancerequirementsofrangefindersomefunctionalmodulearedesignedtomeettherequire

6、mentsoftheclock，modulation，transmit，receive，filter，signalprocessing，asseveralmodulesthesystem’ShardwareBycomparingthesomepopularmethodsofphasemeasuring，thereasonwhyPhasequadraturemixingtypelaserrangingsystemissuperiortot

7、raditionallaserrangingsystemisexplainedThroughcompromiseandcomparison，aprototypeisbuiltbasedonthefinalselectionofhardwareandthemethodofphasemeasuringTheaccuracyoftheexperimentalsystemistestedThefinalresultsconfirmtheaccu

8、racyofthequadraturemodulationlaserrangingmethodBasedontheexperimentalresultsandcurrenttrendsofrangingproducts，thedirectionoffutureimprovementsisgivenKeywords：LaserRangeFinding；QuadratureModulmion；Optoelectronicmixing；APD