铁路移频信号处理方法研究  

Study on frequency-shift signal processing method for railway

作　　者：胡幸江[1] 黄文君[1] 何伟挺[1] 谭平[1] 

机构地区：[1]浙江大学智能系统与控制研究所,杭州310027

出　　处：《仪器仪表学报》2012年第8期1729-1734,共6页Chinese Journal of Scientific Instrument

基　　金：铁道部科技研究开发计划(H20092132)资助项目

摘　　要：提出一种基于数字信号处理技术的识别轨道绝缘节点和解调低频信息的方法,用于LKJ-N列车监控记录装置校正计算前方信号机距离和提供行车指示。首先分析了目前国内使用较为广泛的UM71、ZPW2000、国内移频等轨道信号制式,并针对这些信号制式给出识别轨道绝缘节的详细方法,并利用MATLAB进行算法的仿真与验证。同时以TI公司的32位DSPTMS320F2801为数据采集和处理核心设计硬件电路,实现信号的解调、频谱分析等功能。系统采用模块级冗余、双总线冗余设计,保证系统可靠性。该系统已于2012年2月通过铁道部技术鉴定,并在昆明等路局试用,运行平稳可靠。This paper presents a method to identify the railway insulation node and low frequency signal demodula tion for LKJN train running monitoring and recording device to correct the calculated control distance and provide running indication. The method is based on digital signal processing technology. The detail methods to identify the track nodes are given for several typical railway signal systems such as UM71, ZPW2000 and YiPin track detection circuit in China. The paper adopts MATLAB to carry out the simulation and verification of the algorithm. The TMS320F2801 from TI is used as the core of the hardware circuit to complete signal demodulation and spectrum anal ysis functions. The system has redundancy in module level and adopts dualbus redundant design to guarantee the re liability of the system. The system passed the technical appraisal held by the Ministry of Railway in February, 2012 ; and was put in trial operation in Kunming and other railway bureaus. Operation results show that the system operates stably and reliably.

关 键 词：移频信号 欠采样 绝缘节 信号解调 数字信号处理器 

分 类 号：U284[交通运输工程—交通信息工程及控制]