摘要
ZPW-2000轨道电路是自动闭塞系统中主要轨道电路制式,由于其处在电气化铁路复杂的电磁环境中,因而随着线路的增多使得相邻线路间轨道电路传输信号的干扰频繁发生,有时甚至会造成信号升级显示的现象。通过分析邻线干扰发生的原理,在实验室条件下,利用直接数字频率合成器和单片机相接合的方式,制作移频信号发送盒来实现邻线干扰现象的重现,并利用欠采样原理对重现信号进行采样分析。通过对采样信号的分析提出了一种系统自动确定邻线干扰情况下所处区间低频信号的方法,并运用MATLAB对该方法进行了软件实现,对软件测试发现其结果具有高可靠性,有效防止邻线干扰情况下的信号升级显示的情况,可为机车信号智能化研究提供思路借鉴。
ZPW-2000 track circuit is the main track circuit standard in the automatic block system.As it is in the complex electromagnetic environment of the electrified railway,the interference of the track circuit transmission signals between adjacent lines frequently occurs with the increase of the number of lines,and sometimes even causes the phenomenon of signal upgrading display.Based on the analysis of the principle of adjacent interference,the frequency shift signal box is made by the way of the direct digital frequency synthesizer and the single chip microcomputer under laboratory conditions to realize the recurrence of adjacent interference,and the under-sampling principle is used to sample and analyze the recurrence signal.Through the analysis of the return signal is put forward a kind of system to automatically determine the adjacent line interference cases by interval method of low frequency signal,and using MATLAB software realization of this method,the software testing found that the result has high reliability,effectively prevent the signal of adjacent line upgrade according to situation,can provide some instructions for the locomotive signal intelligence research.
作者
李建国
康耀军
杨波
LI Jianguo;KANG Yaojun;YANG Bo(College of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;China Railway Engineering Consulting Group Zhengzhou design Institute Electrification Communication and Signal Branch,Zhengzhou 450001,China)
出处
《实验室科学》
2022年第5期49-54,共6页
Laboratory Science
基金
教育部2020年产学合作协同育人项目(项目编号:202002022011)
2020年兰州交通大学实验教改重点项目(项目编号:2020004)
兰州交通大学创新创业课程建设重点项目(项目编号:2019 CXCYKC03)。
关键词
邻线干扰
欠采样原理
低频信息
adjacent line interference
under-rate sampling principle
low frequency information
