搜索
StrategyDesignandApplicationofLargeCapacityUltrasonicSewageFlowmeter(,200030),:,,,AbstractInaccordancewithmanyrestrictionsindesignandmodelselectionoflargesizedrectangularconduitflowinstruments,thefundamentalprinci2ple,requirementsofdesignandinstallationaswellasapplicationofultrasonicflowmeterareintroducedemphatically.Thepracticalapplicationshowsthatultrasonicflowmeterpossessmanyunparalleledadvantages,anditisaneffectivesolutionofmeasuringlargecapacitysewageandworthtobepopularized.KeywordsSewageMeteringUltrasonicflowmeter0,,,,,,,,,170/11.11,1AfA,,,fBB,fAfBfDV,C,fDV,fD=fB-fA=(2fA?sin/C)?VV=C2?fA?sin?fD,CfAfB,,,:(37)%FS,1g/L5g/L,1.22:Q,,;,;t1t2,2226820058PROCESSAUTOMATIONINSTRUMENTATIONVol.26No.8August20052:,:t1=L/C+VCos,:t2=L/C-VCost=t2-t1=2Lvcos/C2-V2cos2CV,t=(2Lcos/C2)VV=C2/2Lcostq=SV:V;L;t1;t2;t;C;;S;q:u=Ki?Viq=S?u:u;Kii;Vii;S;Ki,RISONIC2000,1[1]-Jacobi,-Legendre,W,Ki31-Jacobi-Legendre1E2PW1=W2=0.906900W1=W2=1.0K=1.0K=0.9942E4PW1=W2=W3=W4=0.906900W1=W2=W3=W4=1.0K=1.0K=0.9941E4PW1=W4=0.369317W1=W4=0.347855W2=W3=0.597567W2=W3=0.652145K=1.0K=0.9942E8PW1=W4=W5=W8=0.369317W1=W4=W5=W8=0.347855W2=W3=W6=W7=0.597567W2=W3=W6=W7=0.652145K=1.0K=0.994RISONIC2000434RISONIC20004(PLL,phaselockedloop),VCO(1)N,VCO(1),,,VCO,,VCO(2)VCO(1),,2RISONIC2000,,015%,,,,(),(Re),,01003m/s20m/s,32(),1300,,,,:80MHz,1215ns,,,RISONIC2000,,,,,,,,,,,,,,,,,,,33.1,,,,,1%,,500ppm/L,3.2,,5%,,124814,,4,,015%3.315014000mm()250mm15m(150m)3.4:,,,18,45,300m:,,,,,45,300m,,,,E,:(),,,45,3570150m,:012515m,50m,,,,1MHzkHz,,,3.5GB/T17167-1997:510%,,4226820058PROCESSAUTOMATIONINSTRUMENTATIONVol.26No.8August2005,,,,015%,215%3.6,IEC-41(1991111)(1E4P)-4:,:1E4P:015::,LC512:DSP(,):220,:,,,,,,,(),::1%:IP68;IP65?:2MPa::-20+60-3070:420mARS-232Profibus-DP:FCS(),5,,,(IEC)011%,5.1:,,,,,1cm,,5300m,4,,UPS,,,Owics(),,,5.2(),:,0103(31)523.3,,,GP:D2Script,D2Script,GP,,,,,,,,GPWindowParts,,,,,,,,,,4GP,,GPPLCSCADA,,,,,,SCADA1DigitalElectronicsCorporation.GP-PRO/PBforWindowsVer.610PartsListManual,20012DigitalElectronicsCorporation.GP-PRO/PBforWindowsVer.610TagReferenceManual,20013,,,.PLC.,2000(22):2004-07-03,,1980,2002,;(25),,:,,,,,,,69,6,,9215,2004710,4()2()+2%,7,,,,ProfidBus2DP,(FCS),,,,,,,,1..,1994(4)2RISONIC2000OperatingInstructions.20033RISONIC2000.TechnicalManual.2003:2004-12-30,,1945,,;13SCADA,