基于探地雷達(dá)的土壤含水量分析.pdf

1、南昌大學(xué)碩士學(xué)位論文基于探地雷達(dá)的土壤含水量分析姓名：謝國(guó)蘭申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電子與通信工程指導(dǎo)教師：周輝林徐劍萍20091218ABSTRACTABSTRACTAstheincreaseintrafficmileageandtrafficflowandtheswellinginoverloadedvehicles，andtheimpropernessinconstruction，damagesspreadtomostofhigh

2、waysinChinaThemostdeadlyfactorsthataffecthighwayusabilityandworkinglifearedamagestohighways’structures，destructionstowaterandtheoverloadingofvehiclesThisseverelyinfluencessecurityofdrivingandleadstoincreaseinmaintenancec

3、ostTosolvetheseproblems，itisimportanttounderstandthesituationofthehighwayshallowlayer’SqualityThewatercontentofshallowlayercouldreflectthesituationtosomeextentInfraredreflectancemethodandtimedomainreflectancemethodaretwo

4、widelyusedsafemethodstodetectwatercontentBut，bothofthosetwomethodsareslowandtheycannotbeusedtodetectshallowlayerwatercontentinawiderangeWhile，notonlyasaquickmethod，thegroundpenetratingradar(GPR)methodisalsoeasytouseandha

5、snodamagetosubjectstobedetectedGPRisarepeatablemeasuringmethodMostimportantlyitCanbeusedtomeasurewatercontentofalargeareaThismethodisnowprevailedindetectingfundamentalfacilitiesonthehighwayBut，beingdifferentfromopticalim

6、aging，GPRcannotreflectcharactersofsubjectsdirectlyThus，whenGPRisusedinanalyzinghighwayshallow—layer’SqualityhowtogetdatatoestimatewatercontentinshallowlayeristhekeyissueThemainworkofthisstudyistodetectwatercontentofhighw

7、ayshallowlayerautomaticallybycombiningGPR，signaldetectingandanalyzingtechnologyandsignalprocessingtechnologyThemaincontentofthestudyare：1)Detectionanddelayingestimationofhighwayshallow—layer’layerinterface：calculatingGPR

8、reflectingwavesignalbyusingcluttersuppressionalgorithmandthresholddetectormethodtopre—processGPRdatadetecthighwaylayerinterfaceandestimatedelay2)Inversionofhighwayshallowlayer’Sdielectricconstantandestimationofwaterconte