高分辨率的距離變化——相位差精密測量技術(shù).pdf

1、西安電子科技大學(xué)碩士學(xué)位論文高分辨率的距離變化——相位差精密測量技術(shù)姓名：于光運(yùn)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：測試計(jì)量技術(shù)及儀器指導(dǎo)教師：周渭20100101AbstractThispaperpresentsahighresolutionlinearphasecomparisonmethod，appliedtothemeasurememofdistanceanddistancechange，itfullyutilizesthesignalpe

2、riodicityandstabilitycharacteristics，greatlyreducethedependenceonsuperstableoscillator，throughthephaseprocessingaimstoachievehighprecisionmeasuremem，phasemeasurememaccuracyCanbesuperiorto01psTechnologicaladvancesinthisfi

3、eldwillaffectthedevelopmentofhigh—precisionspaceranging，particularlyitplaysanimportantroleintheearth’Sgravityfieldmeasuremems，microwaveintersatelliteranging，navigationandotherrelatedfieldsGenerallytimemeasurememhasahighe

4、raccuracythanspacemeasurement，spatialmeasurememsachievedbymeasuringtimecanimprovethemeasurememaccuracyThespeedofelectromagneticsignaltravelinginfreespaceisanaturalconstant，whichisofhighvalueandhighstabilityTherefore，util

5、izingthefeatureenablesthemutualconversionbetweentimemeasurememandspatialmeasurementInthispaperhigh—precisionmeasurememofdistancechangesisachievedthroughthemeasuremeutofthephasedifference，whichisobtainedbythemethodoflinea

6、rphasecomparisonofperiodicfrequencysignalsWehaveproducedaprototypetomeasurethedistance，testresultsaregiveninthispaperwhichshowsthatdistancemeasurememcanreachmillimetermagnitudeInthisarticlethebasicknowledgeofgroupphaseis

7、introducedByarelationshipoftwofrequencysignalperiods，thephasecomparisonbetweenahigherfrequencysignalandrelativeslowfrequencysignalwillbecompletedInthispapertheuseofphaseinterferencephenomenainthemeasurememofspecialhighfr