基于LabVIEW的地面电子单元C接口眼图算法研究与实现  

Research and Implementation of Eye Diagram Algorithm for Lineside Electronic Unit C Interface Based on LabVIEW

作　　者：连乐 张诚 陈文旗 湛素丽 LIAN Le;ZHANG Cheng;CHEN Wenqi;ZHAN Suli

机构地区：[1]北京铁路信号有限公司,北京102613

出　　处：《铁道通信信号》2024年第4期34-41,共8页Railway Signalling & Communication

摘　　要：基于LabVIEW平台的地面电子单元C1信号眼图算法,计算C1信号的眼图图形、幅值、平均数据率、上升时间、下降时间,以及掩膜入侵点参数值是否满足标准要求。设计实现眼图及相关参数计算的硬件、软件环境:硬件设计选用NI板卡实现数据采集与处理;软件设计采用Lab⁃VIEW语言编程,通过处理C1信号离散点计算眼图图形及参数数值,最终依据眼图参数值判定C1信号性能。通过试验对比同一地面电子单元输出信号眼图算法与示波器眼图模块的计算结果,得出眼图算法与硬件环境设计相关的结论,即在眼图算法与示波器的硬件环境接近的情况下,二者的计算结果也更接近。试验结果表明:基于LabVIEW实现的眼图算法具有稳定性、可用性与低成本优势,且可通过优化硬件环境提升算法的可信度。An eye diagram algorithm for Lineside Electronic Unit(LEU)C1 signal based on the LabVIEW platform is proposed to calculate the eye diagram representation,signal amplitude,average data rate,rise time,and fall time of C1 signal,as well as whether the mask hit ratio meets the standard criteria.Design and implement hardware and software environments for eye diagram and related parameters calculations.In terms of the hardware design,NI cards are used for data collection and processing;and in terms of the software design,LabVIEW language is used for programming.The eye diagram graphics and parameter values were calculated by processing C1 signal discrete points,and the C1 signal performance is determined based on the eye diagram parameter values.Then,experiments are carried out to compare the calculation results obtained from the eye diagram algorithm with those of the oscilloscope eye diagram module for the output signal of the same LEU,and conclusion regarding the relationship between the eye diagram algorithm and hardware environment design is drawn,that is,when the hardware environment for the eye diagram algorithm is similar to that of the oscilloscope,the calculation results are also close.The experimental results show that the eye diagram algorithm implemented based on LabVIEW has the advantages of stability,availability,and low cost,and its reliability can be enhanced by optimizing the hardware environment.

关 键 词：地面电子单元 C1信号 眼图算法 离散点 LABVIEW 可用性 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]