| 摘要 |
<p>PURPOSE:To provide an optical fiber sensor device excellent in practical application, in which complex refraction of optical fiber is small, by furnishing a circumferential groove at the periphery of a non-magnetic ring-shaped member, and winding a twined optical fiber on resilient pieces fastened into the groove. CONSTITUTION:To wind an optical fiber 1 in loop form, a groove 7 for insertion of the optical fiber 1 is furnished at the peripheral surface of a bobbin 5 as a, non-magnetic ring-shaped member. To the bottom of this groove 7, resilient pieces 6 are adhered at even intervals circumferentially. The optical fiber 1 is twined and inserted into this groove 7 while given a controlled tension. Because therein the optical fiber 1 lifts the resilient pieces 6 a little, the twine of the fiber is held by the friction of their contacting surfaces involving a repulsive force. The roles of the resilient pieces 6 are to separate the optical fiber 1 from the groove 7, absorb and relieve the tensile stress in the optical fiber 1 produced thermal expansion and contraction, and prevent generation of detrimental stresses resulting from the fiber touching the groove 7 which is hard.</p> |
