| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a facility monitoring method and a facility monitoring system capable of detecting a physical quantity between each sensor installation point with high sensitivity, even when using a sensor capable of detecting only a physical quantity extremely near the sensor installation point, and thereby capable of reconciling reliability improvement of facility monitoring with instrumentation simplification. Ž<P>SOLUTION: This facility monitoring system 100 includes: a sensor group constituted of FBG sensors 110a-110c installed on a facility inspection portion, deformed corresponding to a physical quantity of the inspection portion, and outputting a reflected light signal having a specific wavelength corresponding to the amount of deformation; optical transmission control parts 121-126 for transmitting light to the sensor group, and receiving the reflected light signal output from the sensor group; and monitoring parts 131-135 for monitoring integrity of the facility inspection portion by using a wavelength or a wavelength conversion amount of the reflected light signal as an index. The monitoring parts 131-135 correlate each wavelength or each wavelength conversion amount of the reflected light signals output from two or more FBG sensors selected among the sensor group, and monitor integrity of the facility by using correlation (on reference to Fig.4) as an index. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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