基于STM32F405芯片的轨道移频采集器的设计  

Design of track frequency shift acquisition device based on STM32F405 chip

作　　者：王洪波 Wang Hongbo(Xi’an Metro Co.ltd,Xi’an,710018)

机构地区：[1]西安市地下铁道有限责任公司,西安710018

出　　处：《现代科学仪器》2018年第2期42-45,48,共5页Modern Scientific Instruments

基　　金：陕西省教育厅2016年科学研究技术(自然科学专项)项目:SOA架构下基于高铁GSM-R人员机具管理系统研发与应用,编号16JK2152。

摘　　要：轨道移频信号是实现列车调度、安全运行的基础,但多元信号源干扰下,使得信号传输面临失真、失效问题,加之行车密度的增加,对轨道移频信号参数的高精准检测提出了更高的要求,针对此,以STM32F405芯片为主控核心,设计了一种基于ZPW-2000A型轨道移频信号采集器,首先根据设计要求给出了整体设计方案,并在频域分析框架下,运用FIR滤波技术进行信号分离和去噪,引入FFT局部频谱连续细化算法优化采样信号精度、降解计算维度,并以能量中心校正法化解频谱泄露问题,从而优化移频信号全参数的检验精度。The track frequency shift signal is the basis to realize the train dispatching and safe operation,but under the interference of the multiple signal sources,the signal transmission is faced with the distortion,the failure and the increase of the driving density,which puts forward higher requirements for the accurate detection of the track frequency shift signal.Due to this,it took STM32F405 chip as the main control core,to design A ZPW-2000A type track frequency shift signal collector.First,the whole design scheme was given according to the design requirements.Under the framework of frequency domain analysis,the signal separation and denoising were carried out by FIR filtering technology,and the FFT local spectrum continuous refinement algorithm was introduced to optimize the sampling signal precision and degrade calculation dimension.And with the energy center correction method to solve the spectrum leakage problem,so as to optimize the accuracy of the whole parameter detection of the frequency shift signal.

关 键 词：移频信号 ZPW-2000A型 过采样技术 ZFFT:算法 

分 类 号：TN911.6[电子电信—通信与信息系统]