智能烟草打顶机械关键技术研究-农业机械化工程专业论文.docx

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2018-05-05 发布于上海
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智能烟草打顶机械关键技术研究-农业机械化工程专业论文.docx

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智能烟草打顶机械关键技术研究-农业机械化工程专业论文

providedbasisintheoryforthecutparameterofthetobaccotoppingmachineandalsoprovideawayforcutparameteroftheothermachine.(3)thesprayingsystemontargetwasresearchedandtheslider-crankmechanismwasdesigned.Itincludethecrank,theslider,theslidingrail,theeffuser,thepositionswitchetc.Thevirtualprototypingmodel for theslider-crankmechanismwasestablishedanditsoutputcharacteristiccurveswereanalyzed.Thesprayingresultsaffectedbythefactorsoftheslider-crankmechanismwasalsoanalyzed.Accordingtothepurposeandtherequirementoftheexperiment,theschemeofdoublefactorsandmulti-factororthogonalexperimentwasdetermined,andtheinfluencetoaccuracyofeachfactorwasanalyzed,Thebestcombinationofexperimentwasobtained.(4)theautomaticcontrollingsprayingsystemontargetwasdesigned.ItcomposedofSCMsystem, speed measuring module, tobaccostalk detecting module, Electromagnetic valve-controlledmodule,stepmotor-controlledmoduleetc.Thespeedmeasuringmodulecouldrealizethespeedofmachinereal-time.Whenthetobaccostalkdetectingmoduledetectedthesignalsofthestalk,ontheonehandtheSCMsystemcontrolledtheElectromagneticvalveopenningtospray,ontheotherhandtheSCMsystemcontrolledthepalstanceandtherotatedangleaccordingtothemoving velocityandeachtimeofmachine,whichmadenozzleaimatorneartothetobaccostalk,sosprayingontargetwasrealized.Sprayingwasover,end,steppmotorreversalleduntilittouchedthepositionswitch,whenpositiontravelswitchshowedasignal,thesteppmotor stopped,waitingforthenextwork signal(5)Onaccountoftheslidermovingnon-uniformlywhichcausedthenozzleandtobaccostalkexistpositiondeviationinsprayingprocess.Sothescrollsprayingsystemontargetwasdesigned.Itchangedthecrankandrockeroftheslider-crankmechanismtoscrollandsteelwire.When thestepmotorrotatedonuniformvelocity,Thesliderdiduniformlyandtranslationalmotion,itsspeedissameofmachineanditsmovingorientationwasoppositetomachine,whichmadethenozzlealwaysaimatthetobaccostalk.Thesimulatingsprayingexperimentresultshowedwhenthespeedofmachinewas0.3m/sintheoriginalsprayingsystem,thecollectingsolutionwas63