无线hart数据链路层协议实现与其时间同步技术分析

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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