Optical cable identity recognition and illegal access detection method and system for smart grid

By collecting vibration signals and multimodal images combined with a priori database of optical cable records, high-confidence verification of optical cable identity and detection of illegal access in smart grids are achieved, solving the problems of optical cable identity information degradation and illegal access detection, and providing reliable end-to-end protection capabilities.

CN121690618BActive Publication Date: 2026-04-14INFORMATION & COMMNUNICATION BRANCH STATE GRID JIANGXI ELECTRIC POWER CO
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Patent Information

Application Number
CN202610195538.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-11
Publication Date
2026-04-14
Estimated Expiration
2046-02-11

AI Technical Summary

Technical Problem

In smart grids, the identification methods for optical cables suffer from problems such as tag detachment, color mark fading, and junction box corrosion, which lead to the degradation of optical cable identification information. There is a lack of effective dynamic verification methods, making it difficult to detect illegal replacement, unauthorized branching, or eavesdropping. Existing technologies cannot achieve reliable identity verification and illegal access detection.

Method used

By acquiring vibration signals, visible light images, and infrared thermal images in real time, and combining them with a lightweight YOLOv8n multimodal fusion recognition network, the system uses a fiber optic cable ledger prior database for identity verification to achieve fiber optic cable identity recognition and illegal access detection. This includes event-driven triggering, multimodal data acquisition, target detection, and consistency verification.

Benefits of technology

It provides high-confidence fiber optic identity verification, which can automatically identify risks such as unauthorized access, identity drift and label forgery, and achieve verifiable, traceable and closed-loop protection capabilities, suitable for scenarios such as urban underground utility tunnels.

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Abstract

The application is suitable for the technical field of communication and power safety monitoring, and provides a kind of optical cable identity recognition and illegal access detection method and system for smart grid, the method comprises the following steps: real-time acquisition vibration signal, when the amplitude of vibration signal is greater than the preset amplitude threshold, and its energy is greater than the energy threshold calculated based on dynamic baseline energy, it is determined as effective disturbance event;In response to effective disturbance event or according to the preset inspection plan, visible light image and infrared thermal image of target optical cable node are synchronously collected;Visible light image and infrared thermal image are spliced to form a fusion image;The fusion image is input into the lightweight target detection network, and the target detection result is output;According to the target detection result, the actual identity information of the current optical cable is extracted, and whether the actual identity information of the optical cable is legal and whether there is illegal access behavior is determined.The application provides a new generation of verifiable, traceable and closed-loop protection capability for the physical layer security of smart grid communication.
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