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1、TheEighthInternationalConferenceonElectronicMeasurementandInstrumentsICEMI’2007DevelopmentofaHighPrecisionMWDSystemKanLinglingGaoBingkunWangXiufangLiangHongwei˄DaqingPetroleumInstitute,Daqing163318China˅Abstract:ThispaperproposestodevelopahighprecisionA/D
2、dataacquisition,microcontrollercontrolcore,MWD(Measurementwhiledrilling)systembasedonLCMdisplayandcomputer.Thewholeblockmicrocontroller.TheadvancedISP(InSystemProgramming)diagramofthesystemisshowninfigure1.A/Dtechnologyisappliedtodevelopthesystem,whichsho
3、rtensmodulerealizesdataacquisitionfor7channelsystemdevelopingtimeˈsimplifiessystemupgradeˈandsensorsignals.Themicrocontrollermoduleisthedeclinesthecostinsystemdevelopment.A/Dmodulecoreofthewholesystem,whichcontrolsdatacompletesdataacquisitionofsevenchanne
4、lsensorsignals,acquisitionA/Dconversion,compensatestheandtherelateddataisdisplayedbytheLCM.Thesignals,operatestheLCM,communicateswiththemicrocontrollercommunicateswithPCthroughRS232.Thecomputer.LCMdisplaystherelateddata.ThePCsoftwareusesVC++6.0asdevelopme
5、ntenvironment,computercommunicateswiththemicrocontrollerwhichrealizesfriendlyhuman-computerinteractionandrealizesthefunctionofdataprocessinganddatainterface.Aftertesting,thesystemhashighprecisionanddisplay.goodstability,whichrespondstotheneedfordirectiona
6、ldrillingoperations,hasconsiderablepracticalvalue.sensorKeywords:MWD;microcontroller;ISP;dataacquisition;signalshighprecision.A/DMCUPC1IntroductionLCDWiththefastdevelopmentofeconomy,energysupplyisbecomingtenserandoildemandgrowsFig1BlockDiagramoftheSystemd
7、aybyday.Inordertoincreaseoilproduction,itisnecessarytoimprovetheprecisionofMWDsystem3ControlCorewhichisoneofkeyinstrumentsfordirectionaldrilling.TheresearchanddevelopmentofhighAT89C51ED2producedbyATMELcompanyprecisionMWDsystemispossiblethankstotheisselect
8、edasthecontrolcoreofthesystem,developmentofmicroelectronic,computerandwhichishighperformanceCMOSFlashversionofcommunicationtechnology.Thispaperproposestothe80C51CMOSsinglechip8-bitmicrocontroller.developthecircuitde
