摘要
高速铁路(简称:高铁)信号系统工作在复杂的电磁环境中,在干扰特性分析和数据处理时,需要对多种模拟和数字信号建立通用平台来完成。本文以Lab VIEW软件作为开发平台,构建了集数据采集、数据格式转换、信号处理为一体的数据处理平台。平台可采集磁带记录仪等模拟信号源,并可导入记录仪存储的数据,从而形成通用处理平台。在此基础上,分析了高铁牵引电流瞬态特性对信号的影响,基于小波变换实现了对海量数据中瞬态干扰奇异点的检测。最后,采用现场实际记录波形进行了处理,验证了平台功能和算法的有效性。信号处理部分还可完成对源信号的时域实时测量、波形显示、滤波、频谱分析等功能。
The Signal System of high speed railway operates in the complicated electromagnetic environment. During the interference characteristics analysis and data processing, a universal platform for various analog and digital signals should be established. An integrated data processing plattform based on LabVIEW software was developed, consisting of data acquisition, data fonnat conversion and signal processing. The platform could collect the signal of the analog source, and import the stored data of the recorder, acting as a universal processing platform. On this basis, the impact of the transient characteristics of high speed railway traction current on the signal was analyzed, and the detection of singularity of transient interference based on wavelet transformation was accomplished. Finally, by processing of the actual wavetfonn recorded at the railway site, the validity of the platform function and algorithm were verified, The signal processing part could implement the functions of real-time measurement in time domain, waveform display, filtering and spectrum analysis.
出处
《铁路计算机应用》
2016年第4期1-5,共5页
Railway Computer Application
基金
国家自然科学基金资助项目(61227002)
中国铁路总公司科技研究开发计划(2014X008-1)
关键词
虚拟仪器
LABVIEW
数据采集
高速铁路
瞬态信号
小波变换
virtual instrument
LabVIEW
date acquisition
high speed railway
transient signal
wavelet transfbrmation
