Fault detection method, system, device and equipment for cable shielding layer, medium and product

By obtaining the cable geometric parameters and actual current values, and combining them with ultra-low frequency power supply to excite capacitive current, the technical gap in the detection of oxidation corrosion of the copper mesh in the cable intermediate joints was solved, and the precise positioning and efficient detection of the intermediate joint shielding layer faults were achieved.

CN120669043APending Publication Date: 2025-09-19NANJING SUYI IND +1
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Patent Information

Application Number
CN202510437721.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-09
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

Existing technologies lack effective detection methods to monitor the oxidation corrosion of the copper mesh in the cable intermediate joints, which leads to discontinuity of the shielding layer and the risk of suspended discharge and insulation ablation.

Method used

By obtaining the cable geometric parameter information, the actual current value at the measuring end and the external power supply information, combined with the capacitive current excited by the ultra-low frequency power supply, and comparing the cable geometric parameters with the actual measured current value, the status of the intermediate joint shielding layer is determined to achieve fault detection.

Benefits of technology

It achieves accurate positioning of the shielding layer fault of the intermediate connector, simplifies the detection process, reduces operation and maintenance costs and safety risks, and improves detection efficiency and anti-interference capabilities.

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Abstract

The invention discloses a fault detection method, system, device and equipment for a cable shielding layer, a medium and a product. The fault detection method for the cable shielding layer comprises the following steps: acquiring cable geometric parameter information of a to-be-detected cable, an actual measurement current value of a measurement end in the to-be-detected cable and external power supply information; a to-be-detected cable is located between the two wiring terminals, and the to-be-detected cable comprises at least one intermediate joint shielding layer; and determining the state of each intermediate joint shielding layer according to the cable geometric parameter information, the actually measured current value and the external power supply information. The measuring end of the to-be-detected cable is connected with the external power supply and the current measuring assembly without disconnecting an intermediate joint or complex wiring. The measurement process is simplified and the operation is convenient. And detecting the state of the shielding layer of the intermediate joint by combining the actually measured current value with the geometric parameter information of the cable. The fault detection of the shielding layer of the intermediate joint is realized, and the accurate positioning of the fault point of the shielding layer is realized.
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