| 摘要 |
A structure of a mandrel in an elongated optical fiber hydrophone is provided to sense a sound signal by generating length variation of an optical sensing fiber in a case of an underwater sound signal is acted to the optical sensing fiber thereof. In a structure of a mandrel in an elongated optical fiber hydrophone, an end part connector is interposed between a cylindrical sensor unit and an end part connecting body(11). The cylindrical sensor includes a tensioning tube(3), a tube-shape mandrel(2), and an optical sensing fiber(1), wherein the tensioning tube includes a spare length receipt unit for the optical sensing fiber inside, the tube-shape mandrel surrounds the tensioning tube, and the optical sensing fiber is wound around the mandrel by many times. Both ends of the cylindrical sensor are uniformly supported by the plurality of end part connecting body to which a tensioning rope(8) is coupled to be hung there.
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