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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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高灵敏度分布式动态压力传感器基于双线频调制光学频域反射计.

Hua Zheng, Yuyao Wang, Huan Wu

    Optics letters
    |June 14, 2024
    PubMed
    概括

    本研究引入了一种新的分布式动态压力传感器,使用双线频调制光频域反射计 (OFDR) 和增强单模光纤 (SMF). 传感器实现了双倍的灵敏度和高精度,用于动态压力测量.

    科学领域:

    • 光纤传感传感器是指光纤传感器.
    • 光学频率域反射计反射计
    • 分布式传感感应 分布式传感

    背景情况:

    • 精确的动态压力传感对于各种工业应用至关重要.
    • 现有的光纤传感器在灵敏度和空间分辨率方面存在局限性.
    • 光学频域反射计 (OFDR) 提供了高分辨率,但需要加强动态压力监测.

    研究的目的:

    • 开发一个高度灵敏的分布式动态压力传感器.
    • 为了提高基于OFDR的压力传感器的灵敏度和准确性.
    • 为了证明传感器对实时动态压力检测的能力.

    主要方法:

    • 使用双线频率调制的光学频域反射计 (OFDR).
    • 使用单模纤维 (SMF),涂层厚度为200μm.
    • 分析双侧波段雷利背散信号与相反的光谱漂移.

    主要成果:

    • 达到 3979 MHz/MPa 的压力灵敏度.
    • 证明了0.76kPa的测量精度和35厘米的空间分辨率在500米的纤维上.
    • 在1.25kHz采样速率下成功检测到动态压力变化.

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    结论:

    • 拟议的传感器显著提高了动态压力测量的灵敏度和准确性.
    • 双LFM OFDR技术与涂层增强的SMF相结合,提供了卓越的性能.
    • 这项技术为现实世界的应用提供了出色的动态测量能力.