| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current detection part of a reflective optical fiber current sensor, capable of circumferentially arranging a current detection optical fiber around a conductor, without having to cut or separate the conductor and having high waterproofing performance. <P>SOLUTION: Both ends of the current detection optical fiber 31 arranged in a flexible protection tube 50 are fixed inside a non-metallic case 40, and penetrate through first and second holes 43, 44 provided to the same surface of the case 40 so that an intermediate part of the flexible protection tube 40 is arranged outside the case 40. A first sealing means 61 and a second sealing means 62, formed of cylindrical elastic bodies, are arranged between the first and second holes 43, 44 and the flexible protection tube 40. The optical fiber cable 20 is pulled into the case 40 from a third hole 45 provided on a surface of the case 40, disposed opposite the first and second holes 43, 44, and a third sealing means 63, formed of a cylindrical elastic body, is arranged between the third hole 45 and the optical fiber cable 20. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
