GPS实时监控外文翻译.docx
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GPS实时监控外文翻译
GPS实时监控外文翻译
(文档含中英文对照即英文原文和中文翻译)
原文:
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:
1)ReceivingsystemofGPSsatellitesignals;
2)Wirelessnetworkdatacommunicationsystem;
3)Computersystem.
Fig.1Illustrationofthesystemnetworkstructure
Accordingtotherequirementsofcompactionforfillingandrammingenginee-ringandconstructionqualitymanagementtosystem,thesystemiscomposedofsupervisorycenter,networkrelaystation,localesub-controlstation,GPSreferencestationandmobileterminals(includingrollercompactionmachinesandqualitysupervisorworkingvehicle),regardingtheeffectofwirelesscommunicationfromtopographicenvironment.Fig.1istheillustrationofconstructionqualitysupervisorysystemforfillingcompactionproject.Ifthetopographicenvironmentisgoodandthedistancebetweenthefillingconstructionon-the-spotandthesystemsupervisory
centerisnotlong,thenetworkrelaystationcanberemoved.
1.1.1Supervisorycenter
Supervisorycenteristheheartofthesystem,wherethedifferentialdataofGPSreferencestationareemittedtotheGPSmobilestations,andatthesametime,receiv-esthepositioninformationfedbackbythemobilestationscontinuouslyandreal-timelythroughwirelessdatacommunication.Combiningtheneedsofconstruction,
electronicdisplayscreenequippedinthesupervisorycentercanreal-timelydisplaytheaccuratemovinglocationandstatusinformationoftherollercompactionmachin-esaswellasthequalitysupervisorworkingvehicleforcompactionplanesofthedam,remotelymonitorthestateofcompactionqualityoffillingengineering,andofferleadersthebasisofdecision.Theprocessing,analysis,storageofthesystemdataandsoonarecarriedoutinthesupervisorycenter.
1.1.2Localesub-supervisorystation
Localesub-supervisorystationistheextensionofthesystemcontrolcenter,andprovidesconvenienceforlocalesupervisor.Byaccessinginformationofthesystemsupervisorycenter,thesupervisorcanmasterthestatusofengineeringconstructionandtheconstructionqualityintimejustintheconstructionlocalesupervisorroom.
Oncequalitydeviationappears,thesupervisorcantacklewiththeconstructionsideontheconstructionlocale,remindingtheconstructorsandaskingthemforrectifying.
1.1.3GPSreferencestation
GPSreferencestationissetforincreasingthesupervisoryprecisionofthesystembymeansofDGPStechnology.WesetaGPSreceiveronaknownsiteasareferencestationandcarryoutGPSobservation,thenemittheGPSobservation
dataandknownlocationinformationofthereferencestationreal-timelytotheGPSmobilestations,andprocessthedataalongwithmobilestations'GPSobservationdatabymeansofdiferentialprocessingofcarrierphases,consequentlycalculatethespatiallocationinformationofthemobilestations,whosepositioningprecisioncanincrease.ThemethodaboveisnamedDGPStechnology.Ingeneral,GPSreferencestationshouldbesetupinthesupervisorycenterforthesakeofconvenientsupportingpow-er,managementandmaintenance.Toensurethesupervisoryprecision,itisstressedthatthedistancebetweentheGPSreferencestationandtheconstructionareamustbelessthan5-6km,andthedistancecontrollingrequirementcanbesatisfiedinpractice.
1.1.4Mobileterminal
Mobileterminalincludessystem-requiringequipmentsinstalledintheprojectsupervisorycarandrollercompactionmachines.
1)Mobileterminalinstalledintherollercompactionmachine
Amobileterminalinstalledinarollercompactionmachineismainlycomposedofanintegratedsystemunit,aGPSreceiverantennaandawirelesscommunicationantenna.Thesystemunitintegratesmainequipmentsofindustrialplatformcomputer,GPSreceiver,wirelesscommunicationandsoon.Mobileterminalismobilesuper-visoryequipmentlikeGPSmovingstation,andcarriesoutGPSmobileobservation.Itscontrolitemsmainlyincludetherolledtrack,rolledspeed,androlledtimesoftherollercompactionmachines.Mobileterminalsfeedbacktheeffectiveobservationresulttothesupervisorycentercontinuouslyandreal-timely.Meanwhile,theplatformcomputerreflectstheworkstatusoftherollercompactionmachinereal-timely,by
meansoffiguresandtablesinthesystemunitofdriver'scaboftherollercompactionmachine.Theoperatoroftherollercompactionmachinecancheckoutwhetherhisorherworkmeetsthequalityrequirementonthedisplayscreen.
2)Mobileterminalinstalledintheprojectsupervisorycar
Projectsupervisorycaristheworkingvehicleforconstructionqualitysuper-visingthatisequippedexclusivelyfortheprojectsupervisors.Itsmaintasksarecarr-yingoutGPSmobileobservationandsupervisinglocalequality.Itsmainitemsofobservationarethethicknessvariationsofpavinglayerbeforeandafterthecompact-ion,supportingdatafor