车辆动态称重技术研究

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1、浙江大学信息科学与工程博士学位论文车辆动态称重技术研究姓名：程路申请学位级别：博士专业：控制科学与工程指导教师：张宏建20080501AbstractThesedays，thevolumesofgroundtransportationkeepincreasingwiththefastdevelopmentoftheindustryandcommerceandthecompetitionbetweentransportcompaniesWasevenmoredrastic．Asaresult．vehiclesoverloadedillegallyalreadvbecomeawidespr

2、eadsocialproblem．Thus，thevehicleweigh。in-motion(WIM)，atechnologycanmeasurethetrafficloads．attractedmoreattentioncurrently．Themostoftheexistingweighingsensorsaremainlysuitabletobeinstalledforpermanentapplications．Althou馥someofthemareportable，theheavyweight'largevolumeslimitedtheapplication．Inthis

3、paper,anovelcapacitanceweighingsensorwasdevelopedbyusingconducivefabricsaselectrodesandinsulatingrubbersandwichesbetweentwoelectrodes．ThisdesignsignificantlyreducesthevolumeandweightoftheW蹦sensor．Moreover,becauseofthisstrikingfeature．thewholesystemcanbeeasilytocarryeventorolledupduetoitsflexibil

4、ity．Basedontheanalysisresultsoftherelationshipamongstress，strainandtime，andtheinfluenceofgeometricalformofforcepart,anumberofexperimentsweretested．Theconclusioncanbedrawn也鑫圭thewholesystemissuitablefortheapplicationtoweighvehiclesinmotion．Inadditionto。accordingtotheanalysisofhardsensorsonthetradi

5、tionalWIMsystems，amodelwiththreedegreeoffreedomwasbeenestablished．Thenasixordermathematics’modelbasedonsysternidentificationinducedfromitwasusedtothesystem。Theexperimentresultsprovedthefeasibilityofthemethod。Themainresearchachievementsareshowedasfollows：2．3．4．Anovelcapacitiveflexibleweighingsens

6、orwasproposed．The‘‘3+2’’structureandchar西nganddischargingcircuitwerepresentedforreducingtheinfluenceofedgeeffectsandparasiticcapacitance+Thecompensatedcircuitwasusedtooffsetthenaturalcapacitancesincethevariationofcapacitancewouldbemuchsmallerthanthenaturalcapacitanceofthesensor．Accordingtothevis

7、coelasticitypropertiesforthesensor’Smaterial．thebehaviorofthesensorwassimulatedbasedontheMaxwell—Kelvinmodelandtherelationshipbetweenvariationofcapacitanceandweightwerederived．殇orelationshipbetweenvariationofcapacitanceandge