内河航道船只流量检测方法-研究

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1、上海交通大学硕士学位论文验证了河道监测系统可准确、有效地监测实际河道中的船只流量。最后，以时长45分钟的现场声压数据的处理结果验证了该方法的有效性并展示了系统运行过程中软件界面的显示情况。关键词：内河航道；船只流量监测；声压级阈值；强线谱时频特征；船只噪声第II页万方数据上海交通大学硕士学位论文ResearchonthetrafficmonitoringmethodofinlandwaterwaysABSTRACTUnderwateracousticdetectiontechnologiesweredevelopedoverthepastdecades,but

2、researchersmainlyconcentratedonoceanandmilitaryfieldapplications,andfewpaidattentiontotheinlandwaterway.Theaffectionsofthegeographicalenvironment,thesoundfieldenvironmentintheinlandwaterwayissodifferentwiththoseintheocean.Astheinlandwaterwaytrafficbecomingincreasinglycrowded,andrese

3、archonvesselstrafficmonitoringintheinlandwaterwayisanincreasinglyimportant.Consideringthecountingproblemwhenanumberofshipsgothroughthemonitoringwaterareainparallel,basedonasetofopticfibersensors,analgorithmisproposedtocountshipsininlandwaterways.Thealgorithmcombinesthethresholdofsou

4、ndenergyandthetime-frequencycharacteristicsofstronglinespectrums.Theprocessingresultsofapieceof45minuteslongsoundpressuredatahaveprovedtheeffectivenessofthisalgorithm.Firstly,thisthesisintroducesthebasictheoryaboutvesselsradiatednoise,andfocusesonvesselsnoisesourcelevelandsomerelate

5、dtime-frequencyanalysistheory.Onthisbasis,thethesisproposesatrafficmonitoringalgorithmintheinland第III页万方数据上海交通大学硕士学位论文waterway,whichcombinesthethresholdofsoundenergyandthetime-frequencycharacteristicsofstronglinespectrums.Thisalgorithmhasawidemonitoringrange,astronganti-interference

6、abilityandahighaccuracyinreal-timeprocessing.Secondly,therelatedmonitoringsystemisdesignedinthisthesis,includingtheexperimentalsiteandthemonitoringsoftware.Finally,theprocessingresultofapieceof45-minuteslongsoundpressuredatademonstratestheeffectivenessofthisalgorithmandverifiestheop

7、erationresultofthesoftware.Keywords:inlandwaterways;vesseltrafficmonitoring;thresholdofsoundenergy;stronglinespectrumtime-frequencycharacteristics;vesselnoise第IV页万方数据上海交通大学硕士学位论文目录摘要.....................................................................................................

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