摘要
为了增强通信漏缆故障定位中的信号强度及故障定位精度,研究线性调频脉冲压缩技术在通信漏缆故障定位中的应用。介绍线性调频脉冲压缩技术的基本原理及线性调频信号的频谱特性,以及其匹配滤波器和窗函数的设计与实现,分析脉冲压缩参数对回波信号的影响,构建通信漏缆故障定位检测系统,对GSM-R型漏缆进行检测试验。试验结果表明,相对于常规脉冲检测方式,线性调频脉冲压缩检测可提高同轴漏缆故障检测精度,载频频率与GSM-R工作频率相接近时效果最佳。在高铁隧道泄漏电缆故障现场检测中,漏缆故障检测效果得到了明显改善。
In order to enhance the signal intensity and fault location precision in positioning of leaky coaxial cable fault,the linear frequency modulation pulse compression technology applied in positioning of communication leaky coaxial cable faultis proposed in this paper.The basic principle of linear frequency modulation pulse compression technology and the spectrumcharacteristics of linear frequency modulation signals are introduced,the design and implementation of the matched filter andwindow function are described,and the effect of pulse compression parameters on echo signals are analyzed to construct the communication leaky coaxial cable fault location detection system for testing GSM-R leaky coaxial cables.The experimental resultsshow that the method of the linear frequency modulation pulse compression can improve the detection accuracy of leaky coaxialcable fault compared to the conventional pulse detection method,the effect reaches best when the carrier frequency is close tothe operating frequency of GSM-R,and the leaky coaxial cable fault detection effect is obviously improved at the scene of high-speed railway tunnel leaky coaxial cable fault detection.
作者
郭进喜
刘扬
何明星
王伟
GUO Jinxi;LIU Yang;HE Mingxing;WANG Wei(School of Mechanical Electronic and Information Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Information and Electrical Engineering,Hebei University of Engineering,Handan 056038,China;Department of Electronic and Information Engineering,Handan Polytechnic College,Handan 056001,China)
出处
《现代电子技术》
北大核心
2017年第19期75-78,共4页
Modern Electronics Technique
基金
国家青年自然科学基金(51604279)
关键词
泄漏同轴电缆
线性调频
GSM-R
脉冲压缩
故障定位
leaky coaxial cable
linear frequency modulation
GSM-R
pulse compression
fault location
