A system and method for locating delaminated interfaces in a multi-layered material

By combining a grating array module and a data processing module, the temperature decay rate is used to identify multi-layer material interfaces, solving the problem of low detection accuracy in existing technologies and achieving high spatial resolution and long-distance interface positioning.

CN122108306APending Publication Date: 2026-05-29WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Filing Date
2026-02-25
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing multilayer material layer interface detection technologies suffer from low detection accuracy, are unable to identify thin layers within 20 cm, and are affected by medium properties and electromagnetic interference, making it impossible to achieve high spatial resolution and long-distance synchronous analysis.

Method used

Employing a grating array module, a grating demodulation module, and a data processing module, and through the parallel deployment of doped measurement fibers and reference measurement fibers, combined with pump heating and optical heating parameters, the temperature changes of multilayer materials are monitored in real time, and the temperature decay rate is calculated to identify the interface.

Benefits of technology

It achieves high-precision positioning of multi-layer material interfaces, improves spatial resolution to 2cm, and can identify millimeter-level interfaces within a kilometer-level measurement range, thus improving detection accuracy and efficiency.

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Abstract

The present application relates to a kind of layered interface positioning system and method of multilayer substance, belong to optical fiber sensing and heat conduction detection technical field, layered interface positioning system of multilayer substance includes grating array module, grating demodulation module, data processing module;Grating array module is used to receive sensing signal light, based on the doped measurement optical fiber after pumping heating and reference measurement optical fiber, real-time monitoring is carried out to multilayer accumulation substance, obtains first grating signal and second grating signal;Grating demodulation module is used to respectively demodulate first grating signal and second grating signal, obtains first center wavelength time sequence and second center wavelength time sequence;Data processing module is used to respectively convert first center wavelength time sequence and second center wavelength time sequence, obtains instantaneous temperature data and ambient temperature data, determines temperature decay rate based on instantaneous temperature data and ambient temperature data, determines the layered interface of multilayer substance based on temperature decay rate, improve detection precision.
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