Gas pipeline breakage detection method and system based on electromagnetic detection technology

By combining high-frequency electromagnetic external detection and stress-weak magnetic detection, a correction model was established, which solved the problem of large errors in electromagnetic detection technology in gas pipeline inspection, and improved the accuracy and precision of defect detection.

CN121253648BActive Publication Date: 2026-07-24SICHUAN JISHI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN JISHI TECH CO LTD
Filing Date
2025-11-11
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing electromagnetic detection technologies have errors in the detection of defects in gas pipelines, which affect the judgment of results, especially in their insufficient ability to detect stress concentration and micro-defects.

Method used

By combining high-frequency electromagnetic external detection and stress weak magnetic detection, a correction model is established by acquiring electromagnetic external detection data and magnetic field gradient data, outputting the defect level and making corrections, thus integrating the advantages of the two detection methods.

Benefits of technology

It improves the detection capability and risk assessment accuracy of pipeline defects, especially the detection of stress concentration and micro-defects, and reduces the error of single electromagnetic external detection.

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Abstract

The application relates to the field of electromagnetic detection, and particularly discloses a gas pipeline damage detection method and system based on electromagnetic detection technology. The scheme provided by the application mainly comprises the following steps: acquiring detection data of current electromagnetic external detection, judging whether an abnormality occurs at a position of a current pipeline based on the current detection data, acquiring magnetic field gradient data of stress weak magnetic detection, and outputting a result of whether to correct a current defect level based on the current magnetic field gradient data. If correction is needed, a correction model is established, and a current correction level is outputted based on the magnetic field gradient data and the defect level based on the correction model. The two schemes of electromagnetic external detection and stress weak magnetic detection are fused through the above method, so that errors caused by single electromagnetic external detection are reduced, high-frequency electromagnetic external detection and stress weak magnetic detection are fused, advantages are complemented, and the detection capability of pipeline defects and the risk assessment precision are greatly improved.
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