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1、华中科技大学硕士学位论文AbstractUntilnow,thedomesticnaturalgasindustryisstillfollowtheoldmechanicalstresstestingmeter,butthisinstrumentcanonlyshowsthecurrentpressurevalue,withoutthedatarecordingandtransmissioncapabilities.Gascompaniescanonlyrelyonthemanualwaytomasterpipelinepressuresituations.Butthismanualmet
2、hodcannotmeettheenterprisesfortheautomationandinformationtechnologyrequirements,anddoesnothelpthecompanycompletelycontrolofthepipelinepressurechanges,andisnotconducivetothecompanytomakeeffectiveschemestoguaranteetheuserstablepressure.Naturalgasisflammable,althoughmechanicalinstrumenthavegoodexplos
3、ion-proof,butthefrequentpersonnelaccesswillincreasetheprobabilityofaccidents.Thereforeweneedtofindanewnaturalgaspipelineinspectionsolutionsurgently.Tosolvetheaboveproblems,thedesignseeksalow-power,high-precision,withrecordingfunction,safetyexplosion-proofelectronicpressuredetectionsolutions.Thesub
4、jectadoptstheCortex-M3basedEFM32seriesoflow-powerprocessorasthecore,withthe2.4GHzRFcommunicationtechnologytoachievedataovercharges.Adoptthepiezoresistivepressuresensortomeasurethepressure,andusetheZMD31050signalconditioningchiptomaketemperaturecompensationandlinearitycorrectionforhighaccuracy.Inte
5、rmsofhardware,aschemewhichutilizetheinfraredsignaltowakeupRFtransmissionispresentedtoavoidthepowerwhentheRFmoduleisinthemodewaitingtoreceive,andthevoltageregulatortechnologyisutilizedtoreducethesystemoperatingvoltage.Intermsofsoftware,inordertosolvetheproblemoflargeamountsofdatastorage,thedesignpr
6、esentsdatascrollingstoragealgorithms.Inordertoachievedatatransmission,thedesigndesignetheaccompanyinghandheldmachine,andthisdevicecantransferthereceiveddatatotheSDcard,andthenwecanrealizeanalysisofthedatathroughthespecialPCsoftware.Aftertestingundernormaloperatingconditions,theoverallprogramachiev
7、ethegoaloflow-power,thesystem'soverallpowerconsumptionisonly300uA.Asaresultoftemperaturecompensationandlinearcompensation,thesystem’spressuremeasurementII华中科技大学硕士学位论文accuracyisupto0.2%whichmeetstheindustrialrequi
