Distributed ocean acoustic-magnetic integrated detection optical cable

By using an all-fiber optic cable structure, combined with a magnetically sensitive cable core layer and an acoustically sensitive tightly wound layer, the problem of achieving distributed marine acoustic-magnetic integrated monitoring in existing technologies has been solved. This enables low-cost, easily integrated real-time monitoring of marine acoustic-magnetic signals, making it suitable for long-distance engineering applications.

CN224471879UActive Publication Date: 2026-07-07SHANGHAI ZHONGKE SHENGUANG OPTOELECTRONIC IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI ZHONGKE SHENGUANG OPTOELECTRONIC IND CO LTD
Filing Date
2025-05-29
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies are insufficient for achieving efficient and low-cost distributed integrated ocean acoustic and magnetic monitoring, and existing methods are complex in structure and cannot be applied over long distances.

Method used

It adopts an all-fiber cable structure, including a magnetically sensitive cable core layer, an acoustically sensitive tightly wound layer, and an outer protective sheath layer. It utilizes magnetosensitive materials and bend-resistant optical fibers to achieve real-time monitoring of acoustic and magnetic signals in the marine environment.

Benefits of technology

It achieves low-cost, easily integrated, fully distributed marine acoustic-magnetic integrated detection, capable of simultaneously monitoring changes in sound waves and magnetic fields in the marine environment, and is suitable for long-distance engineering applications.

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Abstract

A kind of distributed ocean acoustic-magnetic integrated detection optical cable, the optical cable adopts three-layer composite structure, and the magnetic sensitive cable core layer contains rare earth doped optical fiber and magnetostrictive material, to realize high sensitivity magnetic field detection;Sound sensitive dense winding layer through bending-resistant optical fiber spiral winding elastomer, converts sound pressure into optical fiber strain;Outer protective jacket layer provides waterproof and pressure protection.Optical cable tail end can adopt fusion or independent connection mode, to adapt to different monitoring needs.Using magnetic sensitive optical fiber and magnetostrictive material to enhance magnetic field response, combined with bending-resistant optical fiber winding elastomer to modulate optical fiber strain, based on DAS technology, long distance, high precision real-time detection of ocean acoustic field and magnetic field can be completed through a single optical cable, solving the problem of high cost of traditional scheme needing multiple equipment cooperation, with the advantages of lightweight, easy deployment in engineering applications.
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