高分辨率的距離變化——相位差精密測量技術.pdf

1、西安電子科技大學碩士學位論文高分辨率的距離變化——相位差精密測量技術姓名：于光運申請學位級別：碩士專業(yè)：測試計量技術及儀器指導教師：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