CPC G02B 6/4422 (2013.01) [G01H 9/004 (2013.01); G01M 11/02 (2013.01); H02G 1/02 (2013.01)] | 18 Claims |
1. A computer-readable, non-transitory medium storing a program that causes a computer to execute a process, the process comprising:
acquiring a backward Rayleigh scattered light from an optical fiber composite overhead ground wire of an electrical power transmission facility, the electrical power transmission facility including a plurality of steel towers;
generating vibration information of a frequency band including each natural frequency of natural frequencies of the optical fiber composite overhead ground wire of each span of spans of the plurality of steel towers, on a basis of the backward Rayleigh scattered light; and
detecting abnormality of the electrical power transmission facility, on a basis of variation in time of an intensity of each natural frequency,
wherein each natural frequency fluctuates depending on a tension of the optical fiber composite overhead ground wire of each span, and
wherein a fundamental wave and overtones of the fundamental wave appear as each natural frequency in frequency characteristics of the optical fiber composite overhead ground wire of each span.
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