本文对雷达-脉冲型输电线故障点探测器的探测原理作了扼要介绍；

This paper describes the operating principle of radar-impulse type fault locators used in high voltage overhead lines.

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传感器和电路濒临故障，NASA 的专家们意识到他们必须做点什么，否则将永远与探测器失去联系。

Sensors and circuits were on the brink of failing and NASA experts realised that they had to do something or lose contact with their probe forever.

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然后在线路首端注入电流，通过探测器检验几个分支上是否有电流流过，检测到电流的即为故障点所在的分支。

After injecting current into the head of line, the detector can check whether these branches flow current, the fault branch is that the current has flowed.

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