FBG annular ring-down cavity static ice pressure detection system based on FPGA

CN120907703APending Publication Date: 2025-11-07TAIYUAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202510941733.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-09
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve continuous, real-time, and high-precision monitoring of static ice pressure in cold environments. Traditional methods suffer from poor stability, slow demodulation speed, and temperature cross-sensitivity, failing to meet the dynamic detection requirements.

Method used

An FPGA-based FBG ring-shaped ring-shaped cavity static ice pressure detection system is adopted. Combining the high-sensitivity detection characteristics of the fiber optic ring-shaped ring-shaped cavity with the parallel processing capability of the FPGA, multi-point, continuous, and real-time static ice pressure monitoring is achieved through the design of FBG pressure sensors and delay lines.

Benefits of technology

It enables multi-point, continuous, real-time, and high-precision monitoring of static ice pressure, solving the problems of slow detection response, low accuracy, and complex demodulation, and meeting the needs of real-time on-site analysis.

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Abstract

The invention relates to the technical field of optical fiber sensing, and discloses an FBG annular ring-down cavity static ice pressure detection system based on an FPGA, and the system comprises a broadband light source; a light source emitted by a broadband light source sequentially passes through an electro-optical modulator and an erbium-doped optical fiber amplifier and then enters a multi-optical-fiber annular ring-down cavity through a first optical fiber coupler, and signals in the multi-optical-fiber annular ring-down cavity are output through a second optical fiber coupler, detected by a photoelectric detector and then sent to a data acquisition module and an FPGA processor; the multi-fiber annular ring-down cavity comprises a first fiber coupler, a second fiber coupler, a transmission fiber, an optical isolator and a dense wavelength division multiplexer; the dense wavelength division multiplexer comprises a demultiplexer, a multiplexer and a plurality of FBG pressure sensors with different central wavelengths; the FPGA is used for control and data processing, and high-precision and high-resolution multipoint static ice load low-temperature continuous real-time automatic detection is achieved through wavelength division multiplexing and time division multiplexing.
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