摘要
基于现场应答器传输单元故障检测需求,为实现对功放输出异常、电缆短路、电缆断路、运行正常4种不同状态的检测,在现有BTM功放单元上研发检测模块。根据传输线理论和矢量网络法,采用定向耦合器提取功放输出信号耦合电压和反射电压,经计算获得不同特征状态判定参数;获取实验室和现场不同测量条件下不同特征状态的参数分布范围,采用阻抗作为判定参数时,因特征状态参数区间存在部分重叠,以不误报、不漏报为原则,最终选取耦合电压和反射电压作为判定参数。经过多次动态测试验证,该模块可为现场BTM设备功放输出状态的实时检测提供可靠依据,提高BTM设备故障排查自动化水平和效率。
The detection module was developed on the existing BTM power amplifier unit to satisfy the requirements for the fault detection of Balis Transmission Module(BTM)equipment in the field and to realize the detection of four different states of the power amplifier including output abnormality,cable short circuit,cable open circuit and normal operation.According to the transmission line theory and vector network method,the directional coupler was used to extract the coupling voltage and reflected voltage of the power amplifier output signal.The characteristic state judgment parameters were obtained through calculation,and the parameter distribution ranges for different characteristic states under various measurement conditions in the laboratory and the field were collected.The coupling voltage and reflected voltage were selected as the judgment parameters based on the principle of no false alarm report and no missing alarm report and given the fact that there was certain overlap in the parameter ranges of some characteristic states when the impedance is used as the judgment parameter.The detection module has been successfully validated through multiple dynamic tests.It provides a reliable basis for real-time detection of the output status of the power amplifier for BTM equipment in the field,improving the automation level and efficiency of BTM equipment troubleshooting.
作者
周永健
吴庆鹏
王东
王瑞
刘佳
梁迪
ZHOU Yongjian;WU Qingpeng;WANG Dong;WANG Rui;LIU Jia;LIANG Di
出处
《铁道通信信号》
2024年第3期19-25,共7页
Railway Signalling & Communication
基金
中国国家铁路集团有限公司科技研究开发计划(J2023G009)
中国铁道科学研究院集团有限公司科研课题(2020YJ188)
中国铁道科学研究院集团有限公司通信信号研究所科研课题(2021HT03)。
关键词
应答器传输单元
功放
检测模块
定向耦合器
矢量网络法
阻抗
Balis Transmission Module(BTM)
Power amplifier
Detection module
Directional coupler
Vector network method
Impedance
