毕业论文英文翻译GPS实时监测.doc

毕业论文英文翻译GPS实时监测.doc

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GPSReal-TimeSupervisorySystemandApplicationintheConstructionofFaceRockfillDam

HUANGShengxiangLIUJingnanZENGHuai＇en

ABSTRACT

Accordingtothequalitycontrolneedsoffillingconstructionofthefacerockfilldam,bymeansoftheglobalsatellitepositioningtechnology,thewirelessdatacommunicationtechnology,thecomputertechnologyandthedataprocessingandanalysistechnology,andintegratingwiththerollercompactionmachine,theGPSreal-timesupervisorysystemisdevelopedinthispaper.Itcanbeusedtoreal-timelysupervisetheconstructionqualityoftherollercompactionforfillingengineering.

ThecompositionandappliedcharacteristicsofGPSsystem,andthekeytechniqueproblemandsolutionofthedesignarediscussed.TheheightaccuracyofGPSsystemisanalyzedandthepreliminaryapplicationisintroduced.

KEYWORDS：

GPS;fillingconstruction;qualitycontrol;integratedsystem;facerockfilldam

Introduction

Atpresent,inthequalitymanagementoffillingconstructionofthefacerockfilldam，thequalitycontrolmethodof“dualcontrols”ismainlyadopted,ofwhichoneismanuallycontrolingtheparametersofrollercompactionincludingthicknessandroughnessoffillinglayerandrolledtimesandrolledspeedofcompactionmachines,

theotherisinspectingthetestholesamplingmanuallyinthearea.Themethodplayapositiveroleinpromotingdomesticdevelopmentofconcretefacedrockfilldam.However,thetraditionalmanualmanagementmechanismcan＇tmeetthedemandsofmo-dernmechanizedconstructionandscheduleanymore,withincreasingofscaleofcon-cretefacerockfilldam.ConcretefacedrockfilldamofShuibuyaprojectinQingjiangRiverofHubeiProvince,China,rankingfirstindamheightofthesametypeintheworld,isashighas233m.Theprojecthasatotalfillingvolumeof1.6×107m3andmorethan6×105m3forpeakfillingvolumeofasinglemonth,sodemandsmuchmoretocontrolthequalityoffillingconstructionofthedam.Forthesakeofsupervisingthefillingconstructionqualityquicklyintime,itisveryimportanttodevelopasupervisorysystemoftheconstructionqualityoftherollercompactionforfillingengineering,whichhascharacteristicsofreal-time,continuity,automationand

highprecision.Thesupervisorysystemhasagreatmeaningforimprovingtheconst-ructionqualityofShuibuyaproject.

Asabrand-newtechnologyofmodernspatialsatellitesnavigationandposition-ingsystem,GPShasgraduallyreplacedthenormalopticalandelectricalsurveyingequipmentinmoreandmorefields.Since1980s,especiallyafter1990s,GPStechno-logyhasleadthespatialpositioningtechnology,combiningwithmoderncommuni-cationtechnology，toarevolutionarychange.Themethodforsimultaneouslydeterm-ineingthreedimensionalcoordinatesbyGPShaschangedthetraditionalpositioningtechnologyfromlandwithinshoretoentireoceanandouterspace,fromstaticstokinematics,frompointpositioningtonetworkdifference,fromafterwardsprocessingtoreal-timepositioningandnavigation,andabsoluteandrelativepositioningprécisi-oncomingtometerlevel,centimeterlevel,evensubmillimeterlevel,therefore,expandsthefieldsofapplicationandeffectineverywalkoflife.Thefastdevelopmentandimprovementofmoderndatacommunicationtechnology,computertechnology,electricaltechnologyandthespatialpositioningtechnologyonbehalfofGPSmakesupervisionofhighprecisionreal-timecontinuityandautomationfeasible.

Accordingtotherequirementsofconstructionqualitymanagementforrollercompactioninfillingengineering,bymeansoftheglobalsatellitepositioningtechnology,thewirelessdatacommunicationtechnology,thecomputertechnology

andthedataprocessingandanalysistechnology,andintegratingwiththerollercomp-actionmachine,in2004WuhanUniversityandQingjiangHydroelectricDevelop-mentCorp.Ltd.Jointlydevelopedareal-timesupervisorysystemsuitableforthequalitymanagementneedsofrollercompactioninfillingengineering,i.e.real-time

supervisorysystemoffillingconstructionquality（GPSsystemforshortafterwards）.Thesystemhascomprehensivefunctionsofreal-time,highprecision,continuity,automationetc.,socanbeappliedtoreal-timesupervisingconstructionqualityoffillingcompactionfordam,road,protectiondike,airportetc.andbecomesaneffectiveassistantofensuringtheconstructionqualityforproject.Combiningwithengineeringneedsandsystemcharacteristics,thecomposition,keytechniquesandschemesofthesystemarediscussedinthispaper.Theheightaccuracyofthesystemisanalyzedandthepreliminaryapplicationisintroduced.

1CompositionandcharacteristicsofGPSReal-timesupervisorysystem

1.1Compositionofthesystem

Hardwareunitofthesystemmainlyincludes3partsasfollows