数字雷达液位仪信号处理方法研究及系统实现

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1、西北工业大学硕士学位论文数字雷达液位仪信号处理方法研究及系统实现姓名：李军申请学位级别：硕士专业：导航、制导与控制指导教师：王新民20060301AbstractInrecentyears．wimtherapiddevelopmentofthepetroleumindustryandpetroleumchemistryindustry,moreandmoreattentionshavebeenatracekdtotheaccuratemeasurementoftheliquid1evellntanks．Ra

2、derLevelGaugeiSasortofuncontactingtankliquidlevelgaugingsystem．However,thecurrentgaugingsystemisnotSOaccuratetOmeetthedemandsthemorndensystem．DigitalRaderLevelGaugeasanewmeasuringequipmentcandealwiththecurrentlimitationsbyitsadvantagessuchashighprecision，f

3、reearithmetic，reliability,extensiveapplicationandanti-jmnmingability．ThemaintaskofthisdissertationistostudyalgrithrnsofdigitalsignalprocessinganddesignsoftwaresandhardwaresoftheRadarLevelGaugeSystemThedissertationmakesageneralreviewonthedevelopmentandthecu

4、rrentstatusoflevelmeasurementandprinciple，characteristicsandapplicationofdigitallevelmeasureingtechnique．TheadvantadgesofdiscreteFouriertransformandAR—modelspectrumestimationmethodareanalyzedandthelimitationsarealsodiscussed．TraditionalmethodiSdefectiveina

5、nalysingthesignaltransmittedbyRadarlevelGauge，whichareinshortsections．withexcursivefrequencyanddisrelatedphasic．Thus，thenewmethodofSequenceCorrelationMatchingwithhighadaptabilityandtheameliorativesignalprocessingmethodFFT—AR—SCM，basedonrealsignal，arebrough

6、tforward．Theresultsofsimulationbasedonthesemethodshowthatthenewmethodsareemcienttoimprovethemeasuringprecision．Thedissertationcovershardwareandsoftwaredesign．installationanddebugofthedigitalsignalprocessor．MCUiStheSystem．on-a．ChipC8051F020madeinAmericabyCy

7、gnalCompany．TURBOCisusedtocompileprogramssuchasthesignalprocessingalgrithms、communications、display、scoutingthecoreofthelevelradar．ItplaysanimportantroleinresearchofRaderLevelGauge．DisposedliquidlevelsignaliSsenttoControlCentertoregulatetheequipmerit．Theres

8、ultofdigitalsignalprocessingshowsthattheFFT——AR——SCMisaneffectivewayofobtaininghighfrequencyprecisionwithpoorsignal．Thismethodcontributestothedevelopmentofradarlevelgaugingtechnology．TheRadarLevelGaugenotonly