公开(公告)号：US20230258494A1

公开(公告)日：2023-08-17

申请号：US18012341

申请日：2021-06-28

Applicant: NEC Corporation

Inventor： Yutaka Yano ,  Hiroshi Kawakami ,  Makoto Saitoh

IPC: G01H9/00 ,  G08B25/00

CPC classification number: G01H9/004 ,  G08B25/00

Abstract: In order to provide a protection monitoring system that comprises a warning function to which it is not easy to become habituated, and that can call attention at the time when abnormal vibration is sensed even without a cable undergoing failure, the protection monitoring system according to an embodiment of the present invention comprises an optical fiber provided along a long infrastructure element installed in water or on a seabed, an interrogator for acquiring environment information at positions along the long infrastructure element using the optical fiber, an abnormal event detection means for detecting an abnormal event around the positions when the environment information acquired at the positions satisfies an abnormality pattern provided in advance, and a notification means for issuing a notice to a ship positioned in a prescribed range from a position in which the abnormal event is detected.