摘要
为提高相敏接收器测量精度、分辨率,设计了一款基于全相位快速傅里叶变换(all phase Fast Fourier Transform,apFFT)算法的全电子相敏接收器。硬件上为二取二双通道设计,进程上双机同步,运算结果经比较输出。利用DDS发生器搭建测试平台,对该方案功能进行模拟验证,并接入现场轨道电路组合架进行现场测试。实验结果表明,该设计可准确检测轨道区段列车占用状态,能区分钢轨上的随机噪音与谐波信号,抗干扰能力强,相位差测量误差不大于0.3°。该方案是对既有的微电子相敏轨道电路接收器的电子化改进,电路简单,其相位差计算完全由软件完成,可靠性高,可用于使用50 Hz交流电牵引的25 Hz相敏轨道电路的电码化或非电码化区段。
In order to improve the measurement accuracy and resolution of the phase-sensitive receiver,an all-electronic phase-sensitive receiver based on the all-phase Fast Fourier Transform(apFFT)algorithm is designed.The hardware is a two-take-two dual-channel structure,and the process is synchronized by two machines,and the calculation results are output after comparison.The DDS generator is used to build a test platform for simulating and verifying the function of the scheme,and the on-site track circuit combination frame is connected to the field test.The experimental results show that the design can accurately detect the occupancy status of the train in the track section,distinguish the random noise and harmonic signal on the rail.It has strong anti-interference capabilities,with a phase difference measurement error of no more than 0.3°.This scheme is an electronic improvement of the existing microelectronic phase-sensitive track circuit receiver,featuring a simple circuit.The phase difference calculation is completely completed by software,resulting in the high reliability.It can be used for the coded or non-coded sections of the 25 Hz phase-sensitive track circuits powered by 50 Hz alternating current traction.
作者
刁艳美
陈美玲
易靓
DIAO Yanmei;CHEN Meiling;YI Liang(School of Mechanical and Electrical Engineering,Nanjing Technology University Pujiang Institute,Nanjing 210000,China;School of Mechanical Engineering,Jiangxi Vocational College of Industry&Engineering,Pingxiang 337000,China)
出处
《集成电路与嵌入式系统》
2025年第1期67-73,共7页
Integrated Circuits and Embedded Systems
基金
南京工业大学浦江学院校级课题(njpj2023114)。
关键词
二取二双通道
apFFT
25
Hz相敏轨道电路
相位差
two-take-two dual-channel structure
apFFT
25 Hz phase-sensitive track circuit
phase difference
作者简介
通信作者:刁艳美(讲师/工程师),主要研究方向为数字信号处理,E-mail:474816310@qq.com;陈美玲(副教授),主要研究方向为嵌入式系统、自动控制技术;易靓(讲师),主要研究方向为电子信息系统集成技术。
