Optical fiber cable sheath fracture early warning method

Abstract

The invention relates to the technical field of image processing, and concretely relates to an optical fiber cable sheath fracture early warning method. The method comprises the following steps: firstly collecting a cable image, and obtaining a plurality of initial connected domains; obtaining a plurality of defect clusters according to the position relation of the central points of the initial connected domains, judging the initial connected domain which does not belong to the defect cluster as a linear defect; obtaining principal component directions of all initial connected domains in the defect cluster, and screening the initial connected domains in the defect cluster for the first time; on the basis of each defect cluster, according to the increase and decrease sequence of the pixel value sequence of each initial connected domain and the density of the initial connected domains, secondarily screening the initial connected domains in the defect cluster; obtaining a gray level co-occurrence matrix of each initial connected domain in the defect cluster; according to the entropy mean value of the gray-level co-occurrence matrix, screening initial connected domains in the defect cluster for three times; and marking linear defects and defect clusters after three times of screening to obtain defect positions. According to the embodiment of the invention, irregular defects are detected, and the purposes of cable defect detection and early warning are achieved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for early warning of fiber optic cable sheath rupture. Background technique [0002] Cable terminals are widely used in urban distribution network systems. Due to the strict control of the construction time during the installation of the cable terminal, when using a cutter for the outer semiconductive layer of the glass cable, since the cutting depth of the cutter is not easy to control, air gap defects are often left on the main insulating surface during the actual glass process. The distorted electric field at the air gap defect will cause the partial discharge of the terminal, which will cause ablation and carbonization at the air gap defect, accelerate the deterioration of the terminal insulation material, and eventually lead to the breakdown of the terminal insulation. Therefore, it is necessary to detect the defect of the cable terminal. [0003] At prese...

AI Technical Summary

Problems solved by technology

During the installation of the cable terminal, due to the strict control of the construction time, when using a cutter for the outer semiconductive layer of the glass cable, because the cutting depth of the cutter is not easy to control, air gap defects are often left on the main insulating surface in the actual glass process

The distorted electric field at the air gap defect will cause the partial discharge of the terminal, which will cause ablation and carbonization at the air gap defect, accelerate the deterioration of the terminal insulation material, and eventually lead to the breakdown of the terminal insulation, so it is necessary to detect the defect of the cable terminal

[0003] At present, the detection of cable sheath damage is usually to detect the cracks or air gap defects on the surface of the sheath, but not to detect the irregular defects of ablation carbonization caused by air gap defects

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