基于混沌时域反射的电缆故障测试仪

o 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 E-09.