基于双通道的全电子相敏接收器研究与设计
Research and design of all-electronic phase-sensitive receiver based on dual-channel
刁艳美 1陈美玲 1易靓2
作者信息
- 1. 南京工业大学浦江学院机电学院,南京 210000
- 2. 江西工业工程职业技术学院机械工程学院,萍乡 337000
- 折叠
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.
Abstract
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-sen-sitive 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 alter-nating current traction.
关键词
二取二双通道/apFFT/25/Hz相敏轨道电路/相位差Key words
two-take-two dual-channel structure/apFFT/25 Hz phase-sensitive track circuit/phase difference引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据