菜单
　　
    摘要：ZPW-2000A(UM)移频自动闭塞是以移频轨道电路为基础的，拥有世界优秀技术的一种新型自动闭塞，它在确保区间行车安全的同时，在提高区段通过能力上，有着非常显著的效率。ZPW-2000A(UM)移频自动闭塞是以移频轨道电路为基础的自动闭塞，它选用频率参数作为控制信息，采用频率调制的方法，将低频信息(F0)调制到较高频率(载频f0)上，以形成振幅不变、频率随低频信息的幅度作周期性变化的调制信号。将此信号用两根钢轨作为传输通道来控制通过信号机的显示，达到自动指挥列车运行的目的。35591
    ZPW-2000A无绝缘移频自动闭塞是在UM71无绝缘轨道电路技术的基础上，结合国情，进行提高系统安全性、系统传输性能及系统可靠性的技术再开发。不但抑制了UM71系统在传达时需拥有的安全性及传输长度上具有的诸多矛盾，还可以实现全程断轨检查轨道电路，调谐单元断线检查，拍频干扰防护等技术难题。所以ZPW-2000A无绝缘移频自动闭塞系统在提高了抗干扰能力的同时延长了轨道电路的长度。本次设计本应该对ZPW-2000型无绝缘移频自动闭塞实验系统结构设备组成，自动闭塞系统在站间站内的测试、应用和轨道电路的调整都做出详细的分析，但因为时间、条件有限，重点设计ZPW-2000A无绝缘移频实验系统的内部电路结构、系统运行程序编写、室内机柜布置设计。
    毕业论文关键词：ZPW-2000A；自动闭塞；移频电路；轨道电路；内部电路
    ZPW type - 2000 No Insulation Frequency Shift Automatic Block System Design
    Abstract：ZPW-2000A (UM) frequency shift automatic block is to frequency shift track circuit as the foundation, with the world top technology is a new type of automatic block, in ensuring the interval driving safety at the same time, in improving section by ability, efficiency is very significant.ZPW-2000A (UM) frequency shift automatic block is to frequency shift track circuit based automatic block, it selects the frequency parameters as control information, using method of frequency modulation, frequency information (F0) modulation to high frequency (carrier frequency f0) on, to form the amplitude unchanged, frequency with the amplitude of the low frequency information as periodic variation of the modulation signal.Will this signal with two rails as the transmission channel to control through the signal display, to achieve automatic control of train operation.
    ZPW-2000A non insulated frequency shift automatic block is in of UM71 jointless track circuit technology based on, combined with national conditions, to improve system security, system transmission performance and reliability of the technology and development.Not only inhibited the UM71 system in communication with the security and transmission length with many contradictions, also can realize the whole broken rail detection track circuit, tuning unit break check, beat frequency interference protection and other technical problems.So the ZPW-2000A shift frequency automatic blocking system to improve the anti-interference ability and prolong the length of track circuit.The design should have of ZPW-2000 jointless frequency shift automatic block equipment of the experimental system structure composition and automatic block system adjustment in the station between the station test, application and the track circuit to make detailed analysis, but because of the limited time and condition. ZPW-2000A frequency experiment system of focus shift is internal circuit structure and system running the program compiling, indoor cabinet layout design.
    KeyWords：ZPW-2000A; automatic block; frequency shift circuit; track circuit; internal circuit
    目  录
    1    绪论    6
    2    ZPW-2000A无绝缘移频自动闭塞系统的概述    7
    2.1    ZPW-2000A型无绝缘移频自闭系统特点    7
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