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基于光纤频率的亚-100 fε分辨率应变传感基于光纤频率

Xinlong Li, Yongqi Li, Shun Wu

|April 12, 2025

概括

本研究介绍了一种高分辨率的光纤应变传感系统,使用光频 (OFC) 节拍频率解调来精确地检测静态和动态应变. 该系统实现了出色的分辨率和广泛的光谱范围,适合地质物理研究.

科学领域:

光子学和传感技术的技术.
光纤传感传感器是指光纤传感器.
计量学计量学计量学

背景情况:

精确的应变测量对于结构健康监测和地球物理应用至关重要.
现有的光纤传感器在分辨率,动态范围或光谱范围方面面临限制.

研究的目的:

开发和演示一个高分辨率的光纤应变传感系统.
为了利用光学频率 (OFC) 节拍频率解调,提高应变检测能力.

主要方法:

使用纤维法布里-佩罗干扰仪 (FFPI) 作为应变传感元件.
使用光学频率 (OFC) 节拍频率调节来将光学频率转移转换为射频 (RF) 信号.
研究了稳定和自由运行的OFC配置,用于静态和动态应变传感.

主要成果:

在8kHz时实现了247 pε的静态应变分辨率和87 fε/Hz的动态应变分辨率.
展示了10kHz的大光谱范围,使得远离低频噪声的操作成为可能.
使用具有主动频率扫描的自由运行OFC,获得了630 pε的静态应变分辨率.

结论:

开发的基于OFC的应变传感系统提供了高分辨率,大的动态应变测量范围和广泛的光谱范围.
该系统的便携性和适度成本使其成为地球物理研究的一个有前途的工具.
使用OFC的节拍频率解调为高精度光纤应变传感提供了强大的方法.

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