| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for detecting a sound signal and a vibration signal caused from erosion damage of a turbine member by an optical fiber sensor to determine degradation and a life of the turbine member. Ž<P>SOLUTION: The device for detecting an erosion damage of a turbine member includes sensing elements 14, 15 with optical fiber 210 buried in predetermined members 110, 120 of a turbine for detecting transmitted light and reflected light by making light pass through the optical fiber, and a method therefor including the steps of comparing the signal detected by the sensing elements with the feature of the optical signal corresponding to the erosion damage of the predetermined member previously obtained, and determining the degree of the erosion of the member. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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