穿透地层的矿井地下无线通信系统设计方案探析

a311Vol131No1120001JOURNALOFTAIYUANUNIVERSITYOFTECHNOLOGYJan.2000:100729432(2000)0120039205():,,:;;;:TN83016,TN85017:A,,,,,,,,BB=PfLR,(1)DD=1PfLR.(2)f,L(4P10-7Höm),R:fR,,,R(VF013k-3k)(VLF3k30kHz),,,,,,1,,,,R,,R,111,1.,R,RR:R=1dnn=1Rndn.(3):d,Rnn,dnn304mA,117710-2Söm.a:,,19635,,,:,,030024:19992062291112,,,,,,,,,,,,,,,,22,,Rg:Rg=12PRlln4la-1.(4)l,a,R,26mm,015m,R=117710-2Söm,Rg=90(8).33,,,N=K0K=1+R4XE40.K=K0öN=1506m,K0100m,lK,,,4,,,:Ath=010036;:Are=0102.,2,M:EH=Il4Pr3Re-jkr(1-jkr-k2r)cosHõAthõAre.(5)04314HABAMNMZ,I,lMA,H=0,EH=Ezmax,:Imin=RrK2VMN2Pl2AthõAreõe2PrK.(6)VMNMN,lMN,MN=AB=L.R=117710-2Söm,r=304m,f=4980Hz;VMN=2LV,L=100m,K=1504m.Imin=77mA.2KJ38,f4209780Hz,120Hz,52f515Hz,,,,,,,,:,,45Hz5,77mA,5W,167mA.20V,77167mA,,:KJ38,f=4098Hz.,FDMTDM,36,,,,,,,,,f0=4980Hz,,:,515Hz,,f0=4980Hz,,,,,,,,,,141:4,7567,a1,;b1,,,c1,,,:;,,,,,,,[1].[D].:,1997.[2].[J].,1999,30(2):139143.[3]().,.[M].:,1981.64126;172191.[4].[M].:,1994.120150;270280.(52)243138:a18wd28f;b1wd28f4,,,[1]StephaneMallat,WenLianghwang.Singularitydetectionandprocessingwithwavelets[J].IEEETransonIT,1992,38(2):617643.[2]StephoneMallat.Characterizationofsignalsfrommultiscaleedges[J].IEEETransofPatternanalysisandmachineintelli2gence,1992,4(7):710732.[3].[D]:[].:,1999.UsingWaveletTransformtoDeltestPhoneticSegmentationsMaJianfen(CollegeofInformationEngineeringofTUT)Abstract:Anewmethodtodetectthepointsofsharpvariationsofthecontinuousspeechsig2nalisintroduced.Firstlycalculatetheabsolutionofthesourcespeechsignal,thenanalyzetheab2solutedsignalinthedyadicwaveletdomain.Thelocalmaximaoftheeight2orderhigh2frequencysignalisthesegmentpoint.Themethodislesscomplicateandmoreeffectivethanpreviousones.Keywords:phoneticsegmentation;wavelettransform;voiceprocessing(:)(42)DesignofMineRadioCommunicationThroughStratumTaoJinyi(CollegeofElectrical&PowerEngineeringofTUT)Abstract:Consideringthecharactristicsoftheradiocommunicationthroughstratum;usingsingleantennawithshortcircuitterminal,singleside2bandmodulationandreceivingtechniqueofweaksignals;aproposalofmineradiocommunicationthroughstratumispresented.Keywords:electricconductiveratio;sigleantennawithshortcircuitterminal;singleside2bandmodulation;intrinsicsafety(:)2531