Aiming at the problem of high false alarm rate due to the monitoring blind area of transmission line anti external damage early warning method, a real-time anti external damage early warning method of transmission line based on optical fiber sensing technology is proposed. The geometry of the target damaged by external force is a contour representation of the outer edge, and the edge points are used for target recognition. Optical fiber sensing technology is used to accurately locate and quantify the pressure change of the identified target, and the monitoring blind area is reduced according to the stress distribution. The anti external force damage algorithm is designed to extract and locate the moving area of the external force damage target and separate it from the background in the video. The target movement area is divided into three areas: line protection area, monitoring work area and danger warning area. According to the evaluation level, the real-time early warning of external damage prevention of transmission line is carried out. The simulation test results show that the realtime early warning method based on optical fiber sensing technology has lower false alarm rate than the anti external break early warning method based on CNN-RVM, ViBe motion detection algorithm and automatic clustering model. It can provide real-time and reliable early warning information.
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