The spatial resolution of a cable fault location method by frequency domain reflectometry was examined experimentally by giving two abnormalities intentionally along a 31.5-m coaxial cable. As a result, two clear signal peaks appear, which can locate the presence of two hot spots perfectly if they are separated by more than 30 cm at a position about 15 m from the cable end with a measuring device. In addition, a clear signal peak with a small shoulder is recognized if the two hot spots are 1 cm away. Although the abnormalities were given in this research by heating the cable using tape heaters, the spatial resolution should be theoretically similar for any type of fault in a cable as long as it changes the characteristic impedance of the cable. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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频域反射法测量电缆中两个异常之间的空间分辨率

通过频域反射法对电缆故障定位方法的空间分辨率进行了实验检验，方法是故意沿31.5米同轴电缆给出两个异常。结果，出现了两个清晰的信号峰，如果它们之间距离两个端头的距离超过30 cm，且距离测量设备的距离约15 m，则该峰可以完美地定位两个热点的存在。此外，如果两个热点相距1 cm，则可以识别出带有小肩部的清晰信号峰。尽管在这项研究中异常是通过使用带式加热器加热电缆来给出的，但对于电缆中任何类型的故障，空间分辨率在理论上都应该是相似的，只要它改变电缆的特征阻抗即可。©2021日本电气工程师学会。由Wiley Periodicals LLC发布。