数字水准仪和无反射棱镜全站仪在大地工程测量时的精度分析

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1、InvestigatingtheaccuracyofdigitallevelsandreflectorlesstotalstationsforpurposesofgeodeticengineeringKEYWORDS:Totalstation;Digitallevel,Accuracy;Capacityofbattery,ReflectingsurfaceAbstractInordertoachievetheresultsthatmeetthespecificationsofagivenproject,likeengineeringsurveysanddefor

2、mationmeasurements,theknowledgeofthereliabilityandaccuracyofthesurveyingequipmentisinevitable.Precisedigitallevelsandreflectorlesstotalstationsareusednowadaysforseveralapplicationsingeodeticengineeringduetotheirhighlyaccurateandfastmeasurementsinanautomatedmeasuringprocess.Ashortcomi

3、ngisthattheygivelessaccuratemeasurementsinsomecasesofobservations.Thereareseveralsourcesoferrorswhichhaveaneffectontheaccuracyofstaffreadingduringdigitallevelingsuchastheeffectofsun,andthereforehavetobeinvestigated.Thequalityandaccuracyofmeasurementsofelectronicsurveyinginstrumentsma

4、ybeaffectedbythecapacityofinstrumentbatterywhichmaybeworkedforlongtimeinthefield.Thispaperinvestigatestheeffectofsunontheaccuracyofdigitallevelmeasurementsandinvestigatesalsotheeffectofbatterycapacityontheaccuracyoftotalstationanddigitallevelsobservations.Thepaperisperformedalsotofin

5、douttheeffectofinclinedangleofreflectingsurface,itscolorsandtypesontheaccuracyofreflectorlesstotalstationmeasurementswhichhaveagreatinfluenceonmonitoringthedeformationofcylindricalanddomicalstructures.Theresultsofpracticalmeasurements,calculationsandanalysisoftheinterestingtestsusing

6、leastsquarestheoryandcomputerprogramsarealsopresented.a2012FacultyofEngineering,AlexandriaUniversity.ProductionandhostingbyElsevierB.V.Allrightsreserved.1.IntroductionTheappearanceofnewsurveyinginstruments,suchasprecisedigitallevelandreflectorlesstotalstation,requiresinvestigatingits

7、basictechnicalparameterstoimprovethegeodeticmeasurementtechniques.Digitallevelingisasystemofdeterminingheightdifferencesbetweentwopointsusingnearfullyautomaticinstrumentsandmethods.Thisisaccomplishedbytheuseofapatternrecognitionimagingsystembuiltintothelevelinstrumentandlevelrodsgrad

8、uatedwithasp