A method and system for detecting humidity by misaligned fusion splicing mach-zehnder fiber
By converting the spectrum of the misaligned fusion spliced Mach-Zehnder fiber optic humidity sensor from the wavelength domain to the spatial domain, eliminating parasitic high-frequency characteristic peaks, and utilizing the analytical model of transient droplet scattering and heterogeneous material diffusion gradient, the signal degradation problem of fiber optic humidity sensors in complex environments was solved, achieving high-precision and long-life humidity detection.
CN122409585APending Publication Date: 2026-07-17CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA UNIV OF PETROLEUM (EAST CHINA)
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-17
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Figure CN122409585A_ABST
Abstract
本发明公开了一种错位熔接马赫曾德光纤湿度检测方法和系统，涉及光纤传感检测领域，包括获取错位熔接湿度传感器输出的原始复合干涉光谱，将其输入双域特征映射网络，从波长域转换为空间域等效腔长序列；在所述序列中提取能量密度位于预设孤立区间内的寄生高频特征峰，输入遮罩模型将该特征峰对应的能量密度数值置换为零以输出降噪空间域序列；对降噪序列执行逆向特征映射转换回波长域，生成纯净干涉光谱；在纯净光谱中提取目标干涉谷的波长偏移量并映射为环境湿度数值。本发明解决了错位熔接结构引入寄生高频模态导致干涉光谱畸变、进而降低湿度解调精度的问题，在保留主干涉特征的同时实现了精准的靶向降噪。
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