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1、題目:基于ZigBee的土壤含水率檢測(cè)系統(tǒng)設(shè)計(jì)【摘要】在農(nóng)業(yè)、生態(tài)環(huán)境科學(xué)等領(lǐng)域的研究中,常常需要測(cè)量土壤的濕度。土壤濕度測(cè)量具有被測(cè)土地面積大、測(cè)量點(diǎn)多、需要觀測(cè)時(shí)間長(zhǎng)等特點(diǎn)。傳統(tǒng)的測(cè)試方法是將傳感器插入土層,然后進(jìn)行讀數(shù)記錄,不僅花費(fèi)大量的時(shí)間和人力,而且由于人為等因素還會(huì)造成數(shù)據(jù)測(cè)試不準(zhǔn)等問(wèn)題。本文采用CC2530作為核心控制器件,利用埋入地下的土壤濕度傳感器檢測(cè)土壤的濕度,采用基于ZigBee和WSN的自組網(wǎng)通信技術(shù)實(shí)現(xiàn)遠(yuǎn)程數(shù)據(jù)采集,克服了傳統(tǒng)土壤濕度檢測(cè)的缺點(diǎn),討論了系統(tǒng)的硬件電路設(shè)計(jì)、軟件編程和系統(tǒng)調(diào)試。該系統(tǒng)綜合了Zigbee無(wú)線網(wǎng)絡(luò)自
2、組網(wǎng)、自行愈合和超低功耗的優(yōu)點(diǎn),能實(shí)時(shí)監(jiān)測(cè)土壤信息,為進(jìn)一步簡(jiǎn)化農(nóng)業(yè)和生態(tài)環(huán)境的研究操作。最終經(jīng)過(guò)測(cè)試結(jié)果表明,該系統(tǒng)運(yùn)行穩(wěn)定,丟包率低,能及時(shí)準(zhǔn)確的監(jiān)控土壤信息,并將土壤含水率維持在適合植物生長(zhǎng)的最佳含水量的范圍之內(nèi)。【關(guān)鍵詞】CC2530ZigBeeWSN技術(shù)低功耗自組網(wǎng)【Abstract】Researchinthefieldofagriculture,ecologyandenvironmentalscience,andoftenneedtomeasuresoilmoisture.Soilmoisturemeasurementhasaofmeas
3、uredlandareameasurementpoints,needalongobservationtime.Traditionaltestingmethodsisthesensorintothesoil,andthenreadingtherecord,notonlyspendalotoftimeandeffort,butalsoduetoman-madeandotherfactorscanalsocausedatatestallowedandsoon.Inthispaper,CC2530asthecorecontroldeviceburiedint
4、hegroundsoilmoisturesensordetectsthemoisturecontentofthesoil,theuseofremotedataacquisitionbasedonZigBeeWSNgroupnetworkcommunicationtechnology,toovercomethetraditionalsoilmoisturedetectiondisadvantageofthesystemisdiscussedinthehardwarecircuitdesign,softwareprogrammingandsystemde
5、bugging.ThesystemcombinestheZigBeewirelessnetworkfromthenetworkself-healingandultra-lowpowerconsumptionadvantages,real-timemonitoringofsoilinformationtofurthersimplifytheresearchoperationofagriculturalandecologicalenvironment.Afterthefinaltestresultsshowthatthesystemisstable,lo
6、wpacketlossrate,timelyandaccuratemonitoringsoil,andthesoilmoisturecontentismaintainedwithinthescopeoftheoptimummoisturecontentsuitableforplantgrowth.【Keyword】CC2530ZigBeeWSNLowpowerconsumptionAutoAddNetwork目錄一、緒論11.1課題背景21.2研究的目的和意義21.3國(guó)內(nèi)外的發(fā)展現(xiàn)狀2二、ZigBee簡(jiǎn)介22.1Zigbee的概念及特點(diǎn)22.2Zig
7、bee與幾種無(wú)線通信技術(shù)的比較32.2.1ZigBee技術(shù)32.2.2藍(lán)牙技術(shù)32.2.3Wi-Fi技術(shù)的比較42.2.4紅外技術(shù)42.3zigbee網(wǎng)絡(luò)基礎(chǔ)52.3.1ZigBee節(jié)點(diǎn)的類型62.3.2ZigBee網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)62.3.3ZigBee無(wú)線網(wǎng)絡(luò)的組建72.3.4星型網(wǎng)絡(luò)的組建與通信的實(shí)現(xiàn)9三、系統(tǒng)硬件設(shè)計(jì)123.1系統(tǒng)總體電路圖123.1.1土壤含水率數(shù)據(jù)采集電路圖123.1.2ZigBee網(wǎng)絡(luò)節(jié)點(diǎn)電路圖123.2土壤含水率采集電路與原理123.2.1土壤含水量傳感器采集原理123.2.2土壤含水量傳感器電路圖123.3ZigBee
8、節(jié)點(diǎn)基本電路與原理123.3.1時(shí)鐘頻率電路123.3.2復(fù)位電路133.4顯示電路143.4.1諾基亞51