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34 120116 JOURNALOFSHANGHAISHIPANDSHIPPINGRESEARCHINSTITUTEVol.34No.1Jun.2011:2011-01-11:(1985-),,,,。 :1674-5949(2011)01-0071-05尹凯华(上海船舶运输科学研究所民船产品分所,上海200135) :,。;,。。:;;:U666.7 :AUnderwaterSecuritybyDiverDetectionSonarSystemYINKaihua(CommercialMarineProductsDivision,ShanghaiShipandShippingResearchInstitute,Shanghai200135,China)Abstract:Theimportanceofdiverdetectionsonarinunderwatersecurityagainstterrorismisdiscussed.Foreigndiverdetectionsonarsystemsthathavebeenmadepublicareintroducedandanalyzed.ThenewestdiverdetectionsonardevelopedjointlybytwocompaniesinChinaisstudiedandsomeofadvancedtechniquesinthesystemareintroduced.Thefutureofdiverdetectionsonarinunderwatersecurityagainstterrorismispredictedandthedevelopmenttrendofthetechnologyispointedout.Keywords:underwatersecurity;sonar,diverdetection0 ,。,,,、,,,。,,,。,,。,。,。,。,,,,60~100kHz。(),、、、,、、、。,。,,,,,,。,,。。1 Sonardyne,,。360°、、,。QinetiQCerberus,70kHz,30°~360°800m,500m。C-techCSDS-855,80kHz,CW(ContinuousWave),3kHz,,2000m,360°,。,,。DSIT(DDS),,,,60kHz,CWFM(FrequencyModulation),20kHz。DDS(60kHz),、,,700m,,;,1000m;,DDS2000m。5,360°,270°,180°90°,360°。,,20,。2 ,。2010。90°180°,70kHz,10kHz,CWLFM(LinearFrequencyModulation)2,4~20kHz,,。,,±15°。,200m(500m),,。,。,,,。。3 2010。,:SL=2TL-TS+NL+DT(1)(1):SL;TL;NL;TS;DT。(500m)2TL=30lg(r)+2αr/1000=30lg500+2×25×500×10-3≈106dB(2)(2):α=25dB/km。3,(NL1)、(NL2)、(NL3)。72 20111 NL1=NLT-DIs+10lgB(3)(3):DIs;B-3dB(Hz)。DI,2°×30°,DIs=10lg4πSλ2≈10lg4πθHθv≈10lg4π/2×π/18030×π/180≈28.4dB(4) 5°×30°,DIf=10lg4πSλ2≈10lg4πθHθv≈10lg4π/5×π/18030×π/180≈24.4dB(5) NLT=-15+20lgf0=-15+20lg70≈22dB(6)(6):f0(kHz),NL1=NLT-DIs+10lgB=22+40-28.4=33.6dB(7) NL2=NLs-DIs+10lgB(8)(8):NLS40dB。,40dB(),NL2=NLs-DIs+10lgB=40-28.4+10lg10000=51.6dB(9) NL3=20lgv-Mx+10lgB=20lg10×10-9--190+10lg10000=70dB(10)(10):v,10nV/Hz;Mx,-190dB;B-3dB(Hz)。,,,NL≈70dB:TS=-25dBDTd=16,,DT=10lgd=10lg16≈12dB ,SL=2TL-TS+NL+DT=106-(-25)+70+12=213dB(11) 、。,600V,10ms,、,CWLFM,。,、,,,,。。(1)。1,、、(2)。 ,213dB,Mf170dB,Ri80Ψ,,Vi20lgVi=SL-Mf=213-170=43dB(12) Vi141V,Wi=Vi2/Ri=1412/80=250W,Wf=∑8i=1Wi=250×8=2000W。,(3)。73: 1 2 3 ,,(4)。4 5 4:、、(5)。 ,,()。,,5cm,1cm,,,±0.5°,±1dB。DSP,。,DSP。,,,。r500m,Mx-190dB,SL213dB,Vomin=10-SL+Mx/20=10-1.15=0.071mV,700mV,80dB。,,,。2m,Mx-190dB,SL213dB,Vomax200mV,700mV,10.9dB。,80-10.9=69.1dB。,-40~40dB,。,,30dB,±40dB,20dB,,20dB,110dB。4 4.1 ,,,,74 20111 。,2:1)。CW,CW,,CW。,,,,。,,;2),,。,,,,。,,、,,。4.2 ,。,,。,。4.3 ,,,,。,,。,。5 ,。,,。,,,,,。,,,。:[1] .[J].,2010,31(1):36-37.[2] ,,.[J].,2009,54(3):269-272.[3] BrianBorowski,AlexanderSutin,Heui-SeolRoh,etal.Passiveacousticthreatdetectioninestuarineenvironments[J].StevensInstituteofTechnology,2008,6945(13):1-11.[4] MaurizioSoldania,AmletoGabelloneb,ReginaldD,etal.Underseaharbourdefence:Anewchoiceinmagneticnet-works[J].JournalofAppliedGeophysics,2010,72(1):46~56.75:
本文标题:蛙人探测声纳在水下安保的技术实现_尹凯华
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