Abstract: The purpose of the present invention is to provide a tower deterioration detection device and the like capable of detecting deterioration of a tower. A tower deterioration detection device includes: an optical signal reception unit for receiving an optical signal from an optical fiber cable laid in a tower; and a deterioration detection unit for detecting deterioration of the tower on the basis of a vibration pattern of the tower indicated by the optical signal.

Abstract: The purpose of the present disclosure is to detect the occurrence of engineering work in the surroundings of a utility pole or a pylon using a simple configuration. This engineering work detection device comprises: an optical signal reception unit for receiving an optical signal from an optical fiber cable installed by a method of overhead installation via a utility pole or a pylon; and at least one memory configured to store instructions; and at least one processor configured to execute the instructions to detect, on the basis of a pattern of vibration of the utility pole or the pylon indicated by the optical signal, the occurrence of engineering work in the surroundings of the utility pole or the pylon.

Abstract: Provided are a lightning stroke detection device, etc., whereby the occurrence of a lightning stroke can be detected by a simple system configuration. A lightning stroke detection device (4) comprises an optical signal reception means (12) for receiving an optical signal including sensing information from an optical fiber network (3) for detecting the sensing information, and a lightning stroke detection means (13) for using the sensing information included in the optical signal to detect the occurrence of a lightning stroke in the optical fiber network, the sensing information indicating at least a vibration pattern of the lightning stroke, and the lightning stroke detection means (13) detecting the occurrence of a lightning stroke on the basis of the vibration pattern.

Abstract: The optical fiber sensing system includes: a host sensing device including a first optical sensor for receiving, from a first optical fiber, first light corresponding to first pulse light input into the first optical fiber and first signal light and outputting first data for the first optical fiber corresponding to the first light and second data included in the first signal light, and a first data communicator for outputting a data signal including the first data and second data; and a remote sensing device including a second optical sensor for receiving, from a second optical fiber, second light that corresponds to second pulse light input into the second optical fiber and outputting second data including sensing results for the second optical fiber corresponding to the second light, and a second data communicator for outputting, to the first optical fiber, first signal light including the second data.

Abstract: A specifying system according to the present disclosure includes an optical fiber (30) laid along a levee (20) of a river (10), a communication unit (41) configured to receive, from the optical fiber (30), an optical signal containing a pattern that changes according to a state of the levee (20), and a specifying unit (51) configured to specify a water level of the river (10) based on the pattern that changes according to the state of the levee (20).

Abstract: A wind speed specification system according to the present disclosure includes an optical fiber (10) laid around a power transmission line (40), a reception unit (20) that receives an optical signal including information indicating a sound generated when an airflow hits the optical fiber (10), from the optical fiber (10), and a specification unit (32) that specifies a wind speed around the optical fiber (10), based on information indicating a sound that is included in the optical signal.

Abstract: A method of detecting removal of a maintenance hatch includes transmitting an optical pulse along an optical fiber, wherein a first portion of the optical fiber is proximate to the maintenance hatch. The method further includes detecting backscatter light from the optical fiber using a sensor. The method further includes determining information related to the first portion of the optical fiber based on a comparison of the detected backscatter light and a trained model. The method further includes identifying whether the maintenance hatch has been removed based on the determined information.

Abstract: A method of detecting removal of a maintenance hatch includes transmitting an optical pulse along an optical fiber, wherein a first portion of the optical fiber is proximate to the maintenance hatch. The method further includes detecting backscatter light from the optical fiber using a sensor. The method further includes determining information related to the first portion of the optical fiber based on a comparison of the detected backscatter light and a trained model. The method further includes identifying whether the maintenance hatch has been removed based on the determined information.