应答器控制接口回波损耗测试网络建模与研究  

Modeling and research of measurement network for return loss on Balise controlling interface

作　　者：张美艳 徐清 ZHANG Meiyan;XU Qing(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;CRSC(Beijing)Industry Group Co.,Ltd.,Beijing 102627,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]通号(北京)轨道工业集团有限公司,北京102627

出　　处：《北京交通大学学报》2022年第2期82-88,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(61763025)。

摘　　要：应答器控制接口(the Balise controlling interface)C接口作为轨旁电子单元(Lineside Electronic Unit,LEU)与有源应答器的通信接口,其工作性能直接影响信息传输的可靠性.为研究C接口的传输特性,提出了基于传输线理论的C接口回波损耗网络模型.该模型首先对传输信号进行傅氏变换,利用传输线理论建立电缆传输二端口级联网络模型,然后将C接口信号通过不同阻抗匹配条件的网络模型进行仿真,并与其相对应的C接口回波损耗测试网络适配器的实际输出结果进行比较,结果表明:本文网络模型仿真结果与实际测量结果一致,其传输过程存在明显的吉布斯效应,且在不同阻抗匹配条件下:回波损耗测试网络对信号传输会有上升沿冲击以及半周期的延时,造成信号畸变等,降低了信号传输质量.搭建的网络模型可为进一步研究C接口传输特性,提高信号传输性能等提供理论支撑.The Balise controlling interface(also referred to as "Interface C") is the communication interface between the Lineside Electronic Unit(LEU) and the active Balise. Its working performance directly affects the reliability of information transmission. In order to study the transmission characteristics of the Interface C, a return loss network model for Interface C is proposed based on the transmission line theory. Firstly, the transmission signal is Fourier transformed by the model, and the cable transmission two-port cascade network model is established by using the transmission line theory.Then, the Interface-C signal is simulated through the network model with different impedance matching conditions, and compared with the actual output results of the corresponding network adapter for Interface-C return loss test. The results show that the simulation results of the proposed network model are consistent with the actual measurement results, and there is obvious Gibbs effect during the transmission process. Under different impedance matching conditions, the return loss test network will have rising-edge impact and half-cycle delay on the signal transmission, resulting in signal distortion and reducing the signal transmission quality. This research can provide theoretical support for further studying the transmission characteristics of Interface C and improving the signal transmission performance.

关 键 词：有源应答器 轨旁电子单元 回波损耗 阻抗匹配 传输线理论 

分 类 号：U284.77[交通运输工程—交通信息工程及控制]