US 12,467,822 B2
Utility pole deterioration discrimination device and method
Tadayuki Iwano, Tokyo (JP); Naoto Ogura, Tokyo (JP); Hiroaki Koshio, Tokyo (JP); Hideaki Takeda, Kanagawa (JP); and Motohito Ebihara, Kanagawa (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 18/022,955
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Aug. 31, 2020, PCT No. PCT/JP2020/032866
§ 371(c)(1), (2) Date Feb. 23, 2023,
PCT Pub. No. WO2022/044319, PCT Pub. Date Mar. 3, 2022.
Prior Publication US 2023/0341290 A1, Oct. 26, 2023
Int. Cl. G01M 7/02 (2006.01); G01H 9/00 (2006.01); G01M 5/00 (2006.01); H02G 1/02 (2006.01); H02G 7/00 (2006.01)
CPC G01M 7/025 (2013.01) [G01H 9/004 (2013.01); G01M 5/0025 (2013.01); G01M 5/0066 (2013.01); H02G 1/02 (2013.01); H02G 7/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A deterioration discrimination system comprising:
an optical fiber cable strung between utility poles and in contact with a respective one of the utility poles;
a communication unit configured to receive an optical signal from optical fibers included in the optical fiber cable;
a detection unit configured to detect, based on the optical signal received by the communication unit, vibrations that are generated in the respective one of the utility poles; and
a discrimination unit configured to discriminate, based on a vibration frequency of the vibrations that are generated during a specified period among the vibrations that are detected by the detection unit, deterioration of the respective one of the utility poles,
wherein the specified period includes a period during which vibration intensity of the vibrations detected by the detection unit reaches a value equal to or greater than a predetermined value, and
wherein each time the vibration intensity of the vibrations detected by the detection unit reaches the value equal to or greater than the predetermined value within the specified period, the discrimination unit extracts the vibration frequency that is obtained when the vibration intensity reaches the value equal to or greater than the predetermined value and falls within a predetermined frequency range and discriminates deterioration of the respective one of the utility poles based on the vibration frequency extracted a plurality of times.