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ID:32208799
大小:3.16 MB
页数:103页
时间:2019-02-01
《无线hart数据链路层协议实现与其时间同步技术分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、浙江大学硕士学位论文AbstractThereisallincreasingneedforwirelesssensornetworkwiththerapiddevelopmentofsensortechnology,microsystemstechnology,wirelesscommunicationtechnology,andcomputertechnology.Industrialwirelessnetwork,whichisbasedonwirelesssensornetwork,expendsa
2、ndupgradesthefunctionsofindustrialcommunicationtechnology.Itbecomesanotherresearchtopicafterfieldbustechnology.WirelessnetworkcommunicationprotocolintheindustrialfieldincludesHART7.1,ISAl00andWL~-PAofChina.WirelessHARTisawirelessnetworkcommunicationsproto
3、c01.designedtomeettheneedsofprocessautomationapplications.Itprovidesaguaranteefortheindustrialareastoimplementintelligentlow—costwirelesscommunicationbecauseofitssafety,reliabilityandcompatibility.Atthebeginningofthethesis,thedevelopingenvironmentofwirele
4、ssHARTcommunicationprotocolandsoftwarearchitecturedesignareintroduced.WifelessHARTlayers,themessageandthemanagementserviceprimitivesbetweenlayersareanalyzedindetail.What’Smore,thetaskpriorityofProtocollayerandtheinformationinteractionbetweenlayersarealsoc
5、onfirmed.ThethesisputsemphasisonthesoftwareimplementationofwirelessHARTphysicallayeranddatalinklayer.Sincethetimesynchronizationisoneofthekeytechnologiesinwirelesssensornetwork,anditisachievedindatalinklayerofwirlessHART,thethesisalsofocusesontimesynchron
6、izationtechnology.Theworkisdividedintothefollowingthreeparts:(1)Onthebasisofprotocolsoftwarearchitecture,thephysicallayerofwirelessHARTisdesignedandimplemented.Itincludesthedefinitionofvariableandtheprocessingoftheprimitiveandbackgroundtasks.Thephysicalac
7、hievesatransparenttransmissionofthebitStream,andprovidesmessageservicesandmanagementservicesfordatalinklayer.(2)Onthebasisofphysicallayer,thedatalinklayerofwirelessHARTisdesignedandimplemented.Itincludesthevariabledefinition,theprocessingoftheprimitiveand
8、backgroundtasks,thestatemachinerealization,thelinkschedule,thetimeIV浙江大学硕士学位论文Abstractsynchronization,eta1.Thedatalinklayerachievescorrectconversionofstatebystatemachine,andrealizesthelinkscheduleandthetimesynchroni
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