【正文】 rated cabis. Up forward direction receiving route, departure route, main track IIG, siding track(4G) code circuit design, N+1 redundant coder circuit design, and the code detection circuit design of main track, siding line (4G). Instructions according to the design drawings, describes its working principles, the actual methods, train of thought. Mainly introduced the code, testing equipment, and the wiring, some state circuit analysis. A station ZPW2021A closedloop coding design is designed according to the design and specification of railway signal construction. The design of drawing meets the working principle of ZPW2021A closedloop coding system. Key Words: Closedloop coding, Up forward direction, N+1 redundant 蘭州交通大學畢業(yè)設計（論文） III 目 錄 摘 要 ..................................................................................................................................... I Abstract.......................................................................................................................................II 1 緒論 ........................................................................................................................................ 1 概述 ............................................................................................................................. 1 設計的主要內(nèi)容 ......................................................................................................... 1 A站信號平面布置圖 .................................................................................................. 1 信號平面布置圖介紹 ...................................................................................... 1 載頻頻譜的排列 .............................................................................................. 2 補償電容的設置 .............................................................................................. 2 2 A站上行正線接車進路電碼化電路圖 ................................................................................. 3 與正線接車電路有關的繼電器電路 ......................................................................... 3 上行接車電碼化繼電器 SJMJ電路 ................................................................. 3 上行反向發(fā)車電碼化繼電器 XIIFMJ電路 ...................................................... 3 上行切換頻率繼電器 SQPJ電路 ..................................................................... 4 上行發(fā)車改頻繼電器 SFGPJ電路 ................................................................... 4 切碼繼電器 QMJ電路 ...................................................................................... 5 復示繼電器 ...................................................................................................... 5 上行正線接車編碼電路 ............................................................................................. 6 上行正線正向接車進路編碼電路 .................................................................. 6 下行正線發(fā)車進路編碼電路 .......................................................................... 6 上行正線接車閉環(huán)電碼化發(fā)碼設備 ......................................................................... 7 發(fā)送器 .............................................................................................................. 7 道岔發(fā)送調(diào)整器 ZPW?TFD ............................................................................. 7 軌道電路送、受電端主要設備 ................................................................................. 7 室內(nèi)隔離盒 NGLT .......................................................................................... 7 防護盒 HF25 .................................................................................................... 7 室內(nèi)軌道電路防雷組合 MGTLT ................................................................... 7 送、受電端調(diào)整電阻盒 .................................................................................. 7 3 A站上行正線發(fā)車進路電碼化電路圖 ................................................................................. 8 與正線發(fā)車電路有關的繼電器電路 ......................................................................... 8 蘭州交通大學畢業(yè)設計（論文） IV 上行正線發(fā)車編碼電路 ............................................................................................. 8 上行正線發(fā)車進路編碼電路 .......................................................................... 8 下行正線反方向接車進路編碼電路 .............................................................. 8 4 A站上行正線 IIG電碼化電路圖 .......................................................................................... 10 與上行正線 IIG電碼化相關的繼電器電路 .............................................................. 10 上行正線 IIG上、下行接車電碼化繼電器 SIIJMJ、 XIIJMJ電路 ................. 10 倒碼繼電器 IIGDMJ電路 ............................................................................... 10 上行正線 IIG編碼電路 .............................................................................................. 11 5 A站上行側線 4G電碼化和 +1FS設備電路圖 ...................................................................... 12 上行側線 4G上、下行發(fā)車電碼化繼電器 S4FMJ、 X4FMJ電路 ............................ 12 上行側線 4G編碼電路 .............................................................................................. 12 上行 +1FS設備電路圖 ............................................................................................... 13 電平級別和載頻切換 .................................................................................... 13 低頻切換電路 ................................................................................................ 13 發(fā)送通道切換電路 ........................................................................................ 13 6 A站閉環(huán)電碼化機柜設備布置圖 ....................................................................................... 14 站內(nèi)移頻柜 ZY .......................................................................................................... 14 站內(nèi)檢測柜 ZJC......................................................................................................... 15 站內(nèi)綜合柜 ZZH ZZH2....................................................