基于混沌时域反射的电缆故障测试仪  

A cable-fault detector based on chaos time-domain reflectometry

作　　者：苏鹏程[1,2] 王冰洁[1,2] 刘丽[1,2] 徐航[1,2] 张建国[1,2] 李静霞[1,2] 

机构地区：[1]太原理工大学新型传感器与智能控制器教育部和山西省重点实验室,太原030024 [2]太原理工大学物理与光电工程学院,太原030024

出　　处：《中国科技论文》2016年第8期904-908,919,共6页China Sciencepaper

基　　金：国家自然科学基金资助项目(61401299;51404165);高等学校博士学科点专项科研基金资助项目(20121402120019);山西省自然科学基金资助项目(2013011019-3);山西省青年基金资助项目(2013021016-4)

摘　　要：为实现对电缆故障的高精度定位和在线检测,研制了一种基于混沌时域反射技术的电缆故障测试仪,并详细介绍了该仪器的硬件系统结构和软件功能。以URM43型同轴电缆线为被测对象,对该仪器的实际测试性能进行了实验分析。结果表明,该仪器可对同轴电缆短路、断路和阻抗失配等故障实现准确定位,在1 600m的测量范围内,定位结果相对误差在4.3%以下。另外,利用该仪器对构建的通信实验系统中的电缆短路、断路故障进行了在线检测(混沌测试信号对通信系统引入的误码率为10-9量级),满足电缆故障在线检测的要求。To achieve more precise and on-line fault location ,a cable-fault detector based on chaos time-domain reflectometry is presented .The hardware structure and software function of the system are described in detail .To verify the performance of the system ,the experiments are carried out on the URM43 coaxial cable as the cable under test .The results show that the system can locate precisely short circuit ,open circuit and impedance mismatch on coaxial cable .The maximum range is about 1 600 m and the relative error of measurement results is within 4 .3% .More importantly ,the cable-fault detector has better capability in on-line detection .Open and short circuits on cables in the live communication system can be located in the experiments ,and the error rate of the communication system induced by the chaotic signal of the detector is within the order of 10-9 .

关 键 词：电缆故障测试仪 时域反射 混沌信号 在线检测 

分 类 号：TM75[电气工程—电力系统及自动化]