ABNORMALITY DETECTION SYSTEM AND ABNORMALITY DETECTION METHOD

摘要

An abnormality detection system includes an optical fiber, a backscattered light detector, and a data processor. The backscattered light detector is connected to one end side and the other end side of the optical fiber, and configured to acquire a first intensity distribution of backscattered light by making light incident on the optical fiber from the one end side and to acquire a second intensity distribution of backscattered light by making light incident on the optical fiber from the other end side. The data processor calculates transmission loss at each position in the longitudinal direction of the optical fiber by using the first and second intensity distributions and a normalization function, and determines whether or not there is an abnormality based on the result of the calculation.

主权项

1. An abnormality detection system comprising:
an optical fiber; a backscattered light detector connected to one end side and another end side of the optical fiber, and configured to acquire a first intensity distribution of backscattered light by making light enter the optical fiber through the one end side and to acquire a second intensity distribution of backscattered light by making light enter the optical fiber through the other end side; and a data processor configured to calculate transmission loss at positions in a longitudinal direction of the optical fiber by using the first and second intensity distributions and a normalization function, and to determine whether or not there is an abnormality based on a result of the calculation.