基于虚拟仪器的原油管道泄漏检测系统

NationalInstrumentsLabVIEWAVirtualInstrument-BasedOilPipelinesLeakMonitoringSystemAbstract:RawoilleakagehasbeenanimportantproblemtheseyearsinChina,whichwillcauseseriousconsequences,suchaseconomiclossandenvironmentalpollution.Thusamonitoringsystemwhichcandetecttheleakageandlocatetheleakpointisrequired.NationalInstruments’graphicalprogramminglanguage,LabVIEWandDAQboardareusedtoacquirepressure,flowrateandtemperaturecontinuously,monitoringtheconditionofthepipeline.Andwithtelephonecommunicationnet,areal-timemonitoringsystemisestablished.Severalmethodsofsignalprocessing,includingwaveletanalysisareutilized.ThesystemhasplayedabigroleinthepipelinenetworkinShengliOilFieldandlongpipelinesofEastChinaOilBureau.Keywords:oilpipelines,leakage,virtualinstrument,waveletanalysis1997-DOSC2000LabVIEW--11LXt1t22MPa1tt2t1XLxtime22taLX∆+=(1)a∆taatKttKtEDeC()()/()()=+⋅⋅ρ112KρEDeC1Kρ24~20mAHz700HzPCI-6023E24MPa--10PCI-6023ELabVIEW334SignalProcessing523WaveletandFilterBankDesignTookitDesignPanel1DTestPanel52-618060LabVIEWSerialPortVIsInPortOutPortCallLibraryFunctionTCP/IPPLCDDELabVIEWExcelVIServer9478LabVIEWPCI-6023ELabVIEWAdvancedFunctionsLabVIEW200C2%-200135412398-2001495131740--[1]SCADA2001[2]1998[3]LabVIEWUserManual,NationalInstruments,1998[4]ShieQian,DapangChen,JointTime-FrequencyAnalysisPrenticeHall1996[5]SignalprocessingToolsetReferenceManual,NationalInstruments,19995