机械毕业设计265S_bond型轨道电路传输特性分析.pdf

2522011M6nullZnullnullnull/nullnullvnullnullnullJOURNAL OFSHANGHAIUNIVERSITY OFENGINEERING SCIENCEVol.25 No.2Jun. 2011null nullcI|: 1009- 444X(2011)02- 0125- 05l: 2011- 04- 26Te:d(1981- ),3,V,Z_e.Enullmail:xinyuan_luyahoo.fr=:+t(1953- ),3,V3=,Z_9ed!9.Enullmail:SnullbondE.+s陆鑫源1, 钱剑敏2, 梁鉴如3(1.ZEYpY|s,Z200002; 2.vS/,Z201620;3.Z/v0,Z201620)K1: 上海城市轨道交通地铁2号线采用美国联合道岔与信号国际公司(USSI)提供的数字轨道电路AF 904.通过分解电气绝缘中的钢轨a信号环线a阻抗连接器(Snullbond)各部分元素,对轨道电路的传输特性进行了演算和分析.分析表明,阻抗连接器对于轨道电路具有较强的方向性.根据传输特性,提出了日常维护建议.1oM: 音频轨道电路; S型阻抗连接器(Snullbond); 钢轨波阻; 感生电流ms|: U 284.23null nullDS: AAnalysis of Transmission Characteristics of Snullbond Track CircuitLU Xinnullyuan1, QIAN Jiannullmin2, LIANG Jiannullru3(1.Shanghai Rail Transit MaintenanceSupport Center,Telecom & SignalingBranch, Shanghai 200002, China;2.Collegeof InformationSciences and Technology, DonghuaUniversity, Shanghai 201620, China;3.Collegeof Electronicand Electrical Engineering, Shanghai University of EngineeringScience, Shanghai 201620, China)Abstract: Thedigitaltrack circuit AF904suppliedbyUSSI (America) is used inShanghaiMetroLine2.Important components in theelectrical insulation system such as electricinsulating rail,signal loop andimpedanceconnector (Snullbond) were decomposed,then the calculation and analysis were conducted fortrack circuits transmission characteristics.The analysis shows that track circuit Snullbond has a strongdirectionality.According tothetransmission characteristics,proposals for daily maintenancearegiven.Key words: AF track circuit; Snullparameter impedanceconnector; waveimpedanceof rail; induced current1 nullEF3ITE,LET8,iL|l!,.EaEF(Snullbond)a|La!#s!1qF,m1U.m1Vn,l?|L)SnullbondE.|LTxMH,HY?3M,PE3E?lRx ,Vu)s,PLa,L_?|.null null nullZ/v25nullm1nullEFqFig.1null Components of typical track circuit2 nullssEi=?YV|LTx ,LTxHM3,YVEoEyE,lSnullbondEF,El|LRx93,LRx?i=.2.1nullEoEn5Eu4:ErERaELa?G?C,iuoEFZc.Eq10.5 kHzH,F55,PsYG= 1.0504null10- 3sC= 5.443null10- 8FErER= 2(r+ nrc)T:rEHrE, null/km; rcEh)rE, null; nh.r= 2. 91u nullnullfT:uE,0.67 m; nullEEq,0.21null10- 6 null/m; nullEHq,100 H/m;f|q.E9LE=L i,LeEh)LcF.L= Le+ 2(Li+ nLc)E=LiLi= 268u nullnullfELeLe= 0.4ln d- aaT:dELW,m; arEL,m.oTLrc= 0.3null 10- 3 null;Lc= 1.27null10- 3 mHVrTVR= 2 2.91u nullnullf + nrcL= 0.4ln d- aa + 2 268u nullnullf + nLc(1)G1363u106 m,P|q10.5kHz,EHL3,|XHqT(1):R= 0.417 7 nullL= 1.115 22null 10- 4 HKuoEF| Zc|= 44.3766 null2.2 null3sEpV,E3Erail,|L9HYHWMq1:Erail=nullsBdsdt1|LHYLVErailEIrail.2.2.1 null 发送端信号环线 Tx8nullB:p,L3HVA3HF,dB= null4nullIedlR2T:BbH.,s(,ESnullbondBMIrail.,8nullB:pOFT,l|LRxHYsTnull127nullnull null nullZ/v25nullnull=null1.745- 1.745null0.722 2- 0.722 29.499999999null10- 9 1.75+ y(1.75+ y)2+ (0.7235- x)2+ 1.75- y(1.75- y)2+ (0.7235- x)20.7235- x +9. 499 999 999null10- 9 0. 723 5+ x(1.75- y)2+ (0.723 5+ x )2+ 0. 723 5- x(1.75- y)2+ (0. 723 5- x)20.723 5- y +9. 499 999 999null10- 9 1. 75+ y(1.75+ y)2+ (0.723 5+ x )2+ 1.75- y(1.75- y)2+ (0. 723 5+ x)20. 723 5+ x +null9. 499 999 999null10- 9 0.723 5+ x(1.75+ y)2+ (0.723 5+ x) 2+ 0. 723 5- x(1.75+ y)2+ (0.723 5- x )21.75+ y dxdynull null null= 1.165 4null 10- 6 WblErail= nullnull2nullf = 0.07684V.2.4nullM#LRxnullHQpmE5,m1,!0, T4=,?LphZ_9v,ph5=3Z_.m3VAM#uLRxnullHHHY3:H1EYV;H3SnullbondEQ_h;zH24HYD.m3null|LHYFig.3null Signaling loop induction magnetic fluxnull nullyUS,PxLH,PySnullbondL.LHQ_Snullbond3,iOH,pVpx)HsYB2= nulli2nullx, null null B4= nulli2null( b- x)FB= B2+ B4x)|dx,z1.445m,YVs9HYnull=null3.4960.0021.445nulli2nullx+nulli2null(b- x) dxM#LR xnullHYsYnull null= 3.909 5null10- 7 Wbnull E= nullnullcos null= null null2nullf = 0.02577V2.5 nullM#LTxnullH?M#LT xnullsY,B1Snullbond,SLRxnull;6B1?|LT xzH.Z_VQ_.,pLT xzHx)HBcl= nulli2nullx .x)|dx,z1.445mYVs9HYnull=null3.4960.005nulli null 1.4452nullx dxnullcl= 1.798null10- 6 WbEcl= nullclnullcos null= nullcl null2nullf = 0.106 3 VSnullbond3HYSlLRxnullM,nullSnullbond= 3.909 5null 10- 7 Wb,ESnullbond= nullSnullbondnullcos null=nullSnullbond null2nullf = 0.02577V7mLTxnullphZ_Z_,M#LTxnullHE= Ecl- ESnullbond= 0.092779V.2.6 null SnullbondHYEW%,Snullbondz%.m4Snullbond(|L)HY1.m:V/GQ?M#LTnullxlHY;WLuRxlHY;LlM#LRnullxlHY;LSnullbondL=3.5m.BlLHsHYT:BuE3HY,6Bnull128nullnull2d,:SnullbondE.+snull nullM#u?L3M#HY.m4Vn,FvSnullbondV9FlTHY,M#HY9qv.YTHYlM#HY,DH,usM#uY.m4nullSnullbondf/HY1Fig.4null Comparison of magnetic fluxs withdifferent Snullbond lengths3 nullnullESnullbondZ_.lSnullbond|L-1EB=20 lg-uKvuKv= 20 lg nullRxnullRxnull= 9.435 dBH,M#E3H?B.C,TEsM#u,vs1M#|L.,VaM#u?,PSnullbond|LB.l|L?f,lEFyvluAF904nullCPU=AUvY,H,An5l.ID:1 nullb.?LmM.:0,2002.2 null9,S=,+C,.?Lo.lM.:,2003.3 n