基于GPS的煤礦車輛調(diào)度系統(tǒng)研究.pdf

1、論文題目：基于GPS的煤礦車輛調(diào)度系統(tǒng)研究專業(yè)：檢測技術(shù)與自動化裝置碩士生：文晨(簽名)指導教師：馬憲民(簽名)摘要GPS(Globalpositioningsystem)全球定位系統(tǒng)是新一代衛(wèi)星導航定位系統(tǒng)，隨著現(xiàn)代科學技術(shù)的發(fā)展，GPS定位已經(jīng)應(yīng)用到各個領(lǐng)域。本文設(shè)計了一種基于GPS的露天煤礦車輛調(diào)度系統(tǒng)。由于礦山環(huán)境的復雜性，接收機接收到的GPS信號經(jīng)過遮擋或者反射后，會在接收機端產(chǎn)生多徑效應(yīng)，傳統(tǒng)的方法會因多徑效應(yīng)而產(chǎn)生極大的誤

2、差，不能使接收機準確定位。露天煤礦車輛需要在山路等復雜環(huán)境中運輸，通過GPS精確定位可以保證車輛在運輸過程中的安全性。本文首先根據(jù)GPS定位系統(tǒng)在露天煤礦環(huán)境的精確定位應(yīng)用，對煤礦調(diào)度系統(tǒng)的結(jié)構(gòu)及功能作了簡單敘述。針對車輛調(diào)度系統(tǒng)設(shè)計了車輛終端及接收機的整體系統(tǒng)，并對接收機的各個硬件部分作了詳細的硬件設(shè)計和功能描述。針對GPS信號格式的特點，重點研究了基帶信號處理算法，包括信號的捕獲、跟蹤、位同步、幀同步。采用Matlab軟件對仿真產(chǎn)生

3、的信號進行信號處理，再通過邏輯分析儀采集GPS實際信號后用Matlab進行計算處理，證明接收到真實衛(wèi)星的信息。本文將硬件部分的實現(xiàn)過程和Matlab的數(shù)據(jù)仿真處理過程做了對比，驗證了算法的有效性和實用性。最后，針對露天煤礦車輛調(diào)度過程中，由環(huán)境引起GPS信號的多徑效應(yīng)，本文提出了采用免疫算法對多徑信號進行估計，將多徑信號從混合信號中去除，從而達到抑制多徑信號的效果。根據(jù)CA(CoarseAcquisitionCode)碼的自相關(guān)特性，在

4、GPS基帶信號處理算法中將多徑信號與本地CA碼延遲后作相關(guān)，然后將對多徑信號的估計轉(zhuǎn)換為最優(yōu)擬合問題的模型。根據(jù)免疫算法的原理，對多徑信號進行優(yōu)化逼近，避免了逼近模型陷入局部最小值。采用免疫算法對多徑信號進行抑制，估計實際信號中的直達信號和多徑信號，消除了多徑干擾。在短時延多徑的情況下，抑制多徑信號可以提高偽距測量精度，從而提高了GPS的定位精度，對于在露天煤礦車輛的精確定位有著一定的意義。關(guān)鍵詞：GPS接收機；Matlab仿真；免疫算

5、法；多徑；車輛調(diào)度；露天煤礦研究類型：應(yīng)用研究Subject：ResearchonCoalMineVehicleSchedulingSystemBasedonGPSSpecialty：DetectionTechnologyAutomaticDeviceName：WenChen(Signature)Instruct：MaXianmin(Signature)ABSTRACTGPS(Globalpositioningsystem)hasbee

6、nappliedtovariousfieldswiththerapiddevelopmentofmodernsciencetechnology.Avehicleschedulingsystemisproposedftheopencastcoalmineinthispaper.Becauseofthecomplicatedmineenvironmentinopencastcoalminethemultipatheffectwillbepr

7、oducedinthereceiverwhentheGPSsignalsarethroughsomethingwithareflex.TheGPSreceivercannotkeepabetterperfmanceanaccuratepositioningwiththetraditionalmethod.Improvingtheimprecisionofthereceivercanensurethevehicletravelingsaf

8、etywhentraveledinmountainenvironment.FirstofallGPSpositioningsysteminopencastcoalmineenvironmentfprecisepositioningoftheapplicationisintroducedinthispaperthestructurethefunctionofthecoalminedispatchingsystemarestatedsimp

9、ly.Thesystemofthewholereceiverisdesignedeverypartofthehardwareinthereceiverisdesigneddescribedindetail.AftertheintroductionoftheGPSsignalfmatthesignal’sbasebprocessingalgithmwhichincludesthesignalcatchingtrackingbitsynch

10、ronizingframesynchronizingismainlystudied.TheGPSsatellitesignalswhichcreatedbyMatlabsoftwarehavethesameacteristicwiththesignalscollectedfromthelogicanalyzer.Theimplementationprocessesofhardwareareintroducedinthispaperthe

11、ncontrastedwiththeresultsofMatlabsimulationtoverifythevaliditypracticabilityofthealgithm.FinallyinviewofthemultipatheffectoftheGPSvehicleschedulingreceiverintheopencastcoalmineenvironmentanimmunealgithmwhichestimatesthem

12、ultipathsignalsfromthecompositesignalsispresentedthispaper.AccdingtothecrelationpropertiesoftheCA(CoarseAcquisition)codeamathematicsmodelwhichincludesthedirectpathsignalsthemultipathsignalsisestablished.Thecrelationbetwe

13、enthecompositesignalsthelocalsignalsshowstheacteristicofthedirectpaththemultipathsignals.Accdingtotheprincipleofimmunealgithmtheparametersofthemodelcanbefiguredoutwhenthemultipathsignalisapproachedtotheoptimalmodel.Restr