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1、基于ZigBee技術(shù)的無線投票表決系統(tǒng)基站研究’j實(shí)現(xiàn)摘要投票表決系統(tǒng)是一種在選舉、答題、民意測(cè)驗(yàn)等投票表決活動(dòng)中,對(duì)投票結(jié)果進(jìn)行統(tǒng)計(jì)的電子系統(tǒng)。投票表決系統(tǒng)主要分為無線和有線兩大類。無線投票表決系統(tǒng)相對(duì)于有線投票表決系統(tǒng),具有無需布線、移動(dòng)方便等優(yōu)點(diǎn),但傳輸距離不及有線表決系統(tǒng)。隨著無線投票表決系統(tǒng)越來越多地在會(huì)議、數(shù)字教學(xué)中的應(yīng)用,人們對(duì)表決器的功耗、成本、信號(hào)強(qiáng)度和傳輸距離提出了更高的要求。本文吸取無線表決系統(tǒng)和有線表決系統(tǒng)各自優(yōu)點(diǎn),提出了一種將工業(yè)以太網(wǎng)技術(shù)與ZigBee技術(shù)相結(jié)合的無線投票表決系統(tǒng)基站設(shè)計(jì)方案,用以解決無線投票系統(tǒng)存在傳輸距離短,室內(nèi)信號(hào)弱和功耗較高等
2、問題。本文首先比較了ZigBee技術(shù)與現(xiàn)有各種無線技術(shù)的優(yōu)缺點(diǎn),闡述了國內(nèi)外投票表決系統(tǒng)的發(fā)展現(xiàn)狀,在較為深入地研究ZigBee技術(shù)的基礎(chǔ)上給出了系統(tǒng)的總體結(jié)構(gòu)及基站設(shè)計(jì)方案;以AT9lSAM7x256ARM芯片為核心再加上以太網(wǎng)接口、無線通信和電源等功能模塊,完成了基站硬件設(shè)計(jì)并制作了相應(yīng)的實(shí)驗(yàn)裝置;針對(duì)基站系統(tǒng)的功能需求,選取代碼量小,且功能完善的pC/OS.II作為基站的操作系統(tǒng),并實(shí)現(xiàn)了該實(shí)時(shí)操作系統(tǒng)在主控芯片上的移植;完成了TCP/IP協(xié)議棧LwIP和ZigBee協(xié)議棧Z—Stack的植入,且編寫了以太網(wǎng)驅(qū)動(dòng)程序和無線模塊驅(qū)動(dòng)程序,從而具備了底層數(shù)據(jù)交換功能;針對(duì)投票
3、表決系統(tǒng)應(yīng)用背景需求,開發(fā)了包括網(wǎng)絡(luò)管理,數(shù)據(jù)處理及基站管理在內(nèi)的上層應(yīng)用軟件。在實(shí)驗(yàn)室完成了本文研發(fā)的基站與上位機(jī)、表決器的聯(lián)調(diào)工作。成功地實(shí)現(xiàn)了基站將遠(yuǎn)程中心發(fā)送的指令和數(shù)據(jù)傳達(dá)至表決器,以及將表決器的投票結(jié)果傳至遠(yuǎn)程中心的轉(zhuǎn)發(fā)過程,且實(shí)驗(yàn)驗(yàn)證得出了在同一運(yùn)行環(huán)境下,通過架設(shè)多臺(tái)基站,能夠增強(qiáng)信號(hào)的覆蓋面積的結(jié)論。關(guān)鍵詞:無線投票表決系統(tǒng);基站;ZigBee;以太網(wǎng)碩十學(xué)位論文AbstractTheelectronicvotingsystemisusedforthecalculationofthevotingresultsinactivitiesofvoting,answe
4、ring,andopinionpolls.Twocategoriesareincludedinthevotingsystem:thewirevotingsystemandthewirelessvotingsystem.Comparedwiththewirevotingsystem,thewirelesssystemenjoystheadvantagesofno—wiring,andeasytomoveetc...However,thetransmissiondistanceofthewirelessvotingsystemisshorterthanthatofthewirevo
5、tingsystem.Withtheincreasingapplicationofthewirelessvotingsysteminmeetingsandmultimediateaching,peopleraisehigherrequirementsonthevoter’Spowerconsumption,cost,signalintensitystrengthandtransmissiondistance.Intakingthegoodpointsofboththewirevotingsystemandthewirelessone,thethesisproposesabase
6、stationdesignplanofwirelessvotingsystemcombiningtheadvantagesofindustrialEthernettechnologyandZigBeetechnology.Itaimstoimprovethewirelessvotingsystem’Sdisadvantagesofshorttransmissiondistance,weakindoorsignalandhighpowerdissipation.ThethesisfirstlycomparestheadvantagesanddisadvantagesofZigBe
7、etechnologywithvariouswirelesstechnologies,andillustratesthedevelopmentstatusofthevotingsystembothathomeandoverseas.Then,theoverallstructureofthesystemandthedesignplanofthebasestationareintroducedbasedonanindepthstudyontheZigBeetechnology.Centering