| 摘要 |
<p>PURPOSE:To speedily detect an electric conductor being short-circuited and to specify the position of the short-circuit occurrence place by housing a fiber sensor in a jacket which is arranged along the electric conductor whose short circuit is to be detected and generates heat with the short-circuit current of the electric conductor. CONSTITUTION:If the electric conductor 5 is short-circuited, the short-circuit current flows and this short-circuit current flows even to the jacket 7 of an optical fiber sensor part 2 to generate heat with the large electric resistance of the jacket 7 at the position where the short-circuit current flows, and the generated heat is detected by checking the amplitude variation, phase shift, polarization plate variation, etc., of scattered light to detect whether or not the electric conductor 5 is short-circuited. Thus, the short-circuit occurrence of the electric conductor 5 is detected speedily and the distribution of the electric conductor temperature is measured by the sensor fiber 6 to specify the position of the short-circuit occurrence at the same time.</p> |
