预览加载中，请您耐心等待几秒...

基于ZigBee技术的无线数据采集系统设计.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于ZigBee技术的无线数据采集系统设计 ZigBeetechnologyisawirelessnetworkingprotocolthathasgainedpopularityinrecentyearsduetoitslowpowerconsumption,reliability,andeaseofuse.Itisanidealsolutionfordatacollectionapplicationsthatrequireremotedataacquisition.ThisdissertationfocusesonthedesignofawirelessdatacollectionsystembasedonZigBeetechnology. TheZigBeeprotocolisdesignedforlow-powerconsumptionandlow-data-rateapplications.Itslow-power-consumptionfeatureisachievedbyusingawake-upandsleepcycle.NodesinaZigBeenetworkdonotconsumepowerwhentheyaresleeping,andtheyonlywakeupwhenrequired.Thisprotocolprovidesreliabledatatransferbyadjustingthedatatransmissionspeedandpoweraccordingtothesignalstrength. TheZigBeeprotocoloperatesintheunlicensedIndustrial,ScientificandMedical(ISM)bandat2.4GHz,whichisfreeforuseinmostcountries.Theoperatingfrequencybandisdividedintoanumberofchannels,eachwithabandwidthof5MHz,allowinginterference-freecommunication.ZigBeehasamaximumrangeof100meterswithaclearlineofsight,anditcancoveranareaofupto500metersusingmeshnetworktopology. Inthisdissertation,awirelessdatacollectionsystemincorporatingZigBeetechnologyisdesigned.Thesystemconsistsofthreemaincomponents:thesensornode,thecoordinatornode,andthecomputerinterface.Thesensornodeisresponsiblefordataacquisitionandtransmission,whilethecoordinatornodereceivesthedataandsendsittothecomputerinterfaceoverawirednetwork. ThesensornodeisdesignedusinganARM-basedmicrocontroller,whichhasanintegratedZigBeemodule.Itisconnectedtoasensorthatmeasuresthedesiredparameter,suchastemperatureorhumidity.Thesensornodewakesupatapredeterminedtimeinterval,readsdatafromthesensor,andtransmitsittothecoordinatornodeusingtheZigBeeprotocol. ThecoordinatornodeisalsodesignedusinganARM-basedmicrocontrollerwithanintegratedZigBeemodule.Itreceivesdatafromthesensornodeandsendsittothecomputerinterfaceoverawirednetwork.Thecoordinatornodealsoprovidesanetworkmanagementfunction,whichensuresthatthenodeswithinthenetworkareworkingseamlessly. Thecomputerinterfaceisdesignedusingasoftw