UM71轨道电路移频信号测试系统的实现  

The realization of testing the frequency-shift signal of UM71 track circuit

作　　者：高振天 张燕丽 王永刚 

机构地区：[1]郑州机电工程研究所,河南郑州450015 [2]河南省经贸工程技术学校,河南郑州450008

出　　处：《舰船科学技术》2007年第A01期109-111,共3页Ship Science and Technology

摘　　要：介绍了UM71轨道电路移频信号特点。利用脉冲计数式鉴频原理,设计了一种基于单片机的移频信号测试系统。重点分析了移频信号解调过程中滤波电路的设计及频率检测方法的实现,有一定的应用价值。The characteristic of the shift-frequency signal of UM71 track circuit is described. Based on the principle of taking count of pulses to detect frequency, a testing system which is used to test the shiftfrequency signal is designed by MCU. The pivots are the design of filter circuit and the realizing of testing frequency method during frequency demodulation. So, this method has some application merits.

关 键 词：轨道电路 移频信号 脉冲计数式鉴频 单片机 

分 类 号：TM93[电气工程—电力电子与电力传动]