基于嵌入式的地铁FTGS发码电路设计  

Design of Metro FTGS Code Sending Circuit Based on Embedded System

作　　者：缪蓉 MIAO Rong(Nanjing Metro Communication Co.,Ltd.,Nanjing Metro Operation Co.,Ltd.,Nanjing 210012,China)

机构地区：[1]南京地铁运营有限责任公司南京地铁通号分公司,江苏南京210012

出　　处：《苏州市职业大学学报》2020年第4期24-29,共6页Journal of Suzhou Vocational University

摘　　要：为解决地铁西门子遥控无绝缘音频轨道电路(FTGS)中发码电路技术老旧、故障多、维护成本高等问题,设计了一种基于嵌入式的地铁FTGS发码电路。系统采用单片机控制DDS芯片的方法,直接合成出轨道区段所需要的移频信号,再经过功放电路处理输出到钢轨上供机车天线接收。该发码电路装置集成度高,结构简单,故障率低,所输出波形连续性好、精度高,且能够很好地提升轨道电路移频信号的质量,是一种改进FTGS发码电路的可行方案。In order to solve the problems of old technology,frequent faults and high maintenance cost,an embedded FTGS code sending circuit is designed.The system adopts the method of single chip microcomputer controlling DDS chip to synthesize the frequency shift signal needed by the track section directly,and then output it to the rail through the power amplifier circuit processing for the locomotive antenna to receive.The device has high integration,simple structure,low failure rate,good continuity and high accuracy of output waveform,and can improve the quality of frequency shift signal of track circuit.It is a feasible scheme to improve FTGS code circuit.

关 键 词：移频信号 发码装置 西门子遥供无绝缘音频轨道电路 AD9854 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]