| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a temperature crack sensor which detects cracks by detecting vibration of a predetermined frequency band under a predetermined temperature condition. <P>SOLUTION: A temperature crack sensor 1 detects cracks by detecting vibration of a predetermined frequency band under a predetermined temperature condition, and comprises: an optical fiber 4 wound in a coil form and fixed with a predetermined adhesive 7; a vibration application part 2 to which a vibration caused by occurence of the cracks is applied; and a vibration detection part 3 for detecting vibration on the basis of a frequency variation between incident light L1 to and outgoing light L2 from the optical fiber 4. The predetermined temperature condition is -162°C or higher and 0°C or less. The predetermined frequency band is 10 kHz or more and 1000 kHz or less. The predetermined adhesive contains alkoxy group-containing silane modified epoxy resin (1) obtained by dealcoholization condensation reaction of hydroxyl group-containing epoxy resin (A), epoxy compound having one hydroxyl group in one molecule (B), and alkoxysilane partial condensate (C). <P>COPYRIGHT: (C)2013,JPO&INPIT |
