基于磁致伸缩的燃油测量系统的研究

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1、㈤⑩天洋大謦硕士学位论文一-ilRlP]l●0-爿j疆■疆■■¨一学科专业：型盐量羹查壁丛堂作者姓名：卫—壹————指导教师：墓塑茎墼量2006年1月ABSTRACTMuchgreatermeasurementaccuracyisrequiredinthefuelmeasurementsystem．Atthepresenttime，theconccntficitycapacitancefuelmasssensorisusuallyusedinourcountry,whichiseasilyaffectedbymanyfactorssuc

2、hasfueltemperature，densityandenvironmentnoisepollution,thusit’sdifficulttogetgreatermeasurementaccuracyinapplication．Themagnetostrictionliquidlevelseusorhasbeenusedwidelyinindustrialfieldduetosomemeritssuchashigherreliability,greateraccuracy,higherseeurity，convenientfors

3、ystemautomation，andmoreparametersformeasurement，buttherehasbeennoresearchonitinthecivilaviationfuelmassmeasurement．Themagnetostrictiontechnologyisemployedinfuelmassmeasurementinthispaper,themeasurementprincipleofthemagnetostrictionliquidlevelsensoristhoroughlyexpatiated．

4、Moreover,amechanicalstructureandthecorrespondingmeasurementcircuitsareproposed．Basedonthemeasurementprincipleofthemagnetostrictionliquidlevelsensor,anewdesignmethodoffueldensitysensorisproposed，andfuelmassmeasurementsystembasedonmagnetostrictioneffectisbuilt．neimportance

5、ofmagnetostrictiontechnologywillbringgreateraccuracyoffuelmassmeasurement．111eworkofthispaperincludes：1．MechanicMstructuredesignofthemagnetostrietionliquidlevelsensor．Characteristicsofmagnetostrictionmaterialsareanalyzed，thepropersensitivematerialischosen，andthemeasureme

6、ntruler，magnetostrictionenergyconvener，magnetismdobber，circuitboardaredesigned．2．Measurementcircuitsdesignofthemagnetostrictjonliquidlevelsensor．Accordingtosubjectstudy，controlcircuitwithMCUAT89C51asacore，pulsesendingcircuit，pulsereceivingcircuit，countercircuit，temperatu

7、remeasurementcircuit，datadisplayingcircuitaledesigned；thesystemsoftwaredesignisfinished．3．Theinfluenceofchangeinthefueldensityuponthemeasurementerrorisanalyzed，whiletheresultisshownbyMatlab，andarelevanttemperaturecompensationmethodisdiscussed，whichcanreducethelevelmeasur

8、ementerroronfueltemperaturechange．4．Anewfueldensitysensordesignmethodbasedonthemagnetostrjctionliquidle