自動售票機中硬幣單元的嵌入式設計與實現(xiàn).pdf

1、上海大學碩士學位論文自動售票機中硬幣單元的嵌入式設計與實現(xiàn)姓名：俞晟杰申請學位級別：碩士專業(yè)：檢測技術(shù)與自動化裝置指導教師：張美鳳20070201上海大學碩上學位論文ABSTRACTNowadays，moreandmoreundergroundrailwaysystemsarebuilttosolvetrafficprobleminbigcitiesFastdevelopmentofurbanrailwaytransportationh

2、oweverdrivesdemandforamoremodernizedequipmentsystemATVM(AutoTicketVendingMachine)isoneofimportantpartofAFC(AutomaticFareCollection)systemDuetolackofdesignexperience，currentlythecoinunitinATVMmadeinchinaisnotyetdesirablei

3、ntermsofitsrunningtimeandreliabilityfor#vmgchangeThethesisproposesasolutiontodealwiththeproblemThepaperintroducestherelationshipbetweenCoinUnitandthewholeAFCsystem，describesthestructureofCoinUnitandbringsupthefocusofthep

4、rojectconsideringitsreliabilityissueARerananalysisofpossiblefaultofCoinUnit，thewaystoimprovethereliabilityofCoinUnitareputforwardThedetailedsoftwaredesignisdescribedattheendofthethesisThenewsolutionofCoinunitisthefocalpo

5、intofthethesisItisquitedifferentfromthetraditionalwayswhichdeletefaultratesinglyInordertoimprovethereliabilityofCoinUnit，faulttoleranceandfaultmanagementmechanismareaddedintothedesignThekeypointofnewdesignistodealwithpot

6、entialfaultefficientlytoensuiethereliabilityofCoinunitwithouttheextrahardwarecostsSeveralinnovationsapply：1TreatsimilarfunctionalmodulesinCoinUnitasbackupeachother；2RealizetheselftestfunctionalofCoinUnittolocatefaultpart

7、sontime；3Addfaultselfdiagnosismechanismtodiagnosethefaultpartsandreusethenormalparts；4ProvidemaintenancestafftestingcommandtoolstOfacilitateonlinequeryforfaultpartsInthesoftwaredesignofCoinUnitreal—timeoperatingsystemske