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: Provided is a portable device which make it possible to facilitate analysis, in cooperation with an external system, on data obtained by optical fiber sensing. A portable device comprises: a sensing unit configured to execute optical fiber sensing using an optical fiber cable; an analysis unit configured to execute primary analysis processing on sensing data obtained by the optical fiber sensing; a communication unit configured to transmit data containing the results of the primary analysis processing to an external analysis unit configured to execute, outside the portable device, secondary analysis processing based on the results of the primary analysis processing; and a housing which accommodates the sensing unit, the analysis unit, and the communication unit.

Abstract: A power failure detection system according to the present disclosure includes an optical fiber (10) configured to detect a state of a transformer (40), a reception unit (201) configured to receive an optical signal including information indicating the state of the transformer (40), from the optical fiber (10), and a detection unit (202) configured to detect occurrence of a power failure, based on information indicating the state of the transformer (40), the information being included in the optical signal.

Abstract: An identification system (1) includes a transmitter (131) for transmitting pulsed light via an optical fiber (10); a receiver (132) for receiving backscattering light of the pulsed light from the optical fiber (10); a detector (133) for detecting, from the backscattering light, the condition of environment surrounding the optical fiber (10); and an identifier (320) for identifying sagging of the optical fiber (10) from a detection result by the detector (133).

Abstract: In order to provide a detection device that is capable of detecting the submersion of a fiber-optic cable in water before water penetrates the interior of the fiber-optic cable, a detection system 1 comprises: a vibration-detecting fiber-optic cable 20; a receiving means 11 that receives an optical signal including vibrations detected by the fiber-optic cable 20; and a detection means 12 that detects submersion of the fiber-optic cable in water on the basis of the vibrations 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: An optical fiber sensing system according to the present disclosure includes an optical fiber (10), a reception unit (21) configured to receive, from the optical fiber (10), an optical signal including an environment pattern indicating a state of an environment in proximity to the optical fiber (10), and a detection unit (22) configured to detect an occurrence of a power outage, based on a change in the environment pattern.

Abstract: An optical fiber sensing system according to the present disclosure includes: an optical fiber (10) configured to detect vibration; a reception unit (21) configured to receive, from the optical fiber (10), an optical signal on which the vibration detected by the optical fiber (10) is superimposed; and an abnormality assessment unit (22) configured to assess whether a vibration pattern of the optical signal is already known, and to assess, when the vibration pattern of the optical signal is not already known, that an abnormality has occurred.

Abstract: An optical fiber sensing system according to the present disclosure comprises an optical fiber (10), a reception unit (21) configured to receive, from the optical fiber (10), an optical signal including a vibration pattern, and a detection unit (22) configured to detect occurrence of a rescue request based on the vibration pattern included in the optical signal.

Abstract: An optical fiber sensing system according to the present disclosure comprises: an optical fiber (10) that is laid in a pipe (30); a reception unit (21) configured to receive, from the optical fiber (10), an optical signal superimposed with vibration detected by the optical fiber (10); and an assessment unit (22) configured to extract a vibration pattern of the vibration detected by the optical fiber (10) from the optical signal and determine the degradation state of the pipe (30) based on the extracted vibration pattern.

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: An article support structure for a vehicle includes a vehicle body floor (2) having a substantially flat reference placing surface (2A) onto which an article is placed and fixed, and a recessed section surface (2B) continuously formed at an edge of the reference placing surface (2A) and recessed downward with respect to the reference placing surface (2A), and an auxiliary supporting member detachably attached to the recessed section surface (2B) and configured to support a portion of the article placed on the reference placing surface (2A) from below, wherein the auxiliary supporting member (14) includes an article support surface (14c-1) having substantially same upper surface height as the reference placing surface (2A) in a state in which the auxiliary supporting member is attached to the recessed section surface (2B), and a fastening section configured to fasten the auxiliary supporting member with the recessed section surface (2B) and release the fastening.

Abstract: An article support structure for a vehicle includes a vehicle body floor (2) having a substantially flat reference placing surface (2A) onto which an article is placed and fixed, and a recessed section surface (2B) continuously formed at an edge of the reference placing surface (2A) and recessed downward with respect to the reference placing surface (2A), and an auxiliary supporting member detachably attached to the recessed section surface (2B) and configured to support a portion of the article placed on the reference placing surface (2A) from below, wherein the auxiliary supporting member (14) includes an article support surface (14c-1) having substantially same upper surface height as the reference placing surface (2A) in a state in which the auxiliary supporting member is attached to the recessed section surface (2B), and a fastening section configured to fasten the auxiliary supporting member with the recessed section surface (2B) and release the fastening.

Abstract: A representative line card in a switch system that is configured of a layer 2 switching processor and a plurality of line cards connected to the layer 2 switching processor, the plurality of line cards including at least one representative line card, comprising: an FDB table having FDB information entried therein, and; a learning unit that receives a learning notification including the FDB information from the other line cards excluding its own line card via the layer 2 switching processor, determines whether the FDB information of the learning notification has been entried into the FDB table of its own line card, updates the FDB table of its own line card when the FDB information has not been entried, and transmits the learning notification including the FDB information to the other line cards via the layer 2 switching processor with a multicast.

Abstract: An IP (Internet Protocol) telephone system according to the present invention is an IP telephone system including an IP telephone terminal communicating with an opposite party using SIP (Session Initiation Protocol), and a network device transferring a packet from the IP telephone terminal, wherein the IP telephone terminal includes a CPU (Central Processing Unit) transmitting an SIP packet indicating an e-mail address related to a telephone number of the opposite party when the terminal resides in a non-disaster area and calls the opposite party in a disaster area with a disaster mode being set, and the network device includes an SIP packet processing part terminating an SIP packet whose destination is an e-mail address, an e-mail creation part converting a voice packet of RTP (Real Time Protocol) from the IP telephone terminal into text data and creating an e-mail, and a packet transmitting part transmitting the e-mail to the opposite party.

Abstract: A representative line card in a switch system that is configured of a layer 2 switching processor and a plurality of line cards connected to the layer 2 switching processor, the plurality of line cards including at least one representative line card, comprising: an FDB table having FDB information entried therein, and; a learning unit that receives a learning notification including the FDB information from the other line cards excluding its own line card via the layer 2 switching processor, determines whether the FDB information of the learning notification has been entried into the FDB table of its own line card, updates the FDB table of its own line card when the FDB information has not been entried, and transmits the learning notification including the FDB information to the other line cards via the layer 2 switching processor with a multicast.

Abstract: An IP (Internet Protocol) telephone system according to the present invention is an IP telephone system including an IP telephone terminal communicating with an opposite party using SIP (Session Initiation Protocol), and a network device transferring a packet from the IP telephone terminal, wherein the IP telephone terminal includes a CPU (Central Processing Unit) transmitting an SIP packet indicating an e-mail address related to a telephone number of the opposite party when the terminal resides in a non-disaster area and calls the opposite party in a disaster area with a disaster mode being set, and the network device includes an SIP packet processing part terminating an SIP packet whose destination is an e-mail address, an e-mail creation part converting a voice packet of RTP (Real Time Protocol) from the IP telephone terminal into text data and creating an e-mail, and a packet transmitting part transmitting the e-mail to the opposite party.

Abstract: Disclosed is a ring network in which ring domains are managed in ring forms, layer 2 switches located on both ends of a link shared by a plurality of the ring domains monitor the shared link, and one of the ring domains that share the shared link expands to another ring domain when a failure is detected in the shared link. The locations of blocking ports are managed by an initially configured master node in each ring domain, and the locations of the blocking ports remain unchanged when the ring domain is expanded.

Abstract: A system for controlling the orbit of a satellite by operating a plurality of thrusters is disclosed. In the system, an actual attitude of the satellite is sensed, an evaluation is set up on the basis of the sensed attitude and compared with a threshold which is adequately changing, and the ON-OFF condition of the firing of the thrusters is based on the relationship between the evaluation value and the threshold.