High resolution, dynamic strain measurements with continuous fiber Bragg gratings for structural health monitoring

A. Sang, K. Marsden, M. Wolfe, D. Gifford, M. Froggatt, B. Soller
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引用次数: 3

Abstract

We describe the use of swept-wavelength interferometry (sometimes referred to as optical frequency domain reflectometry, OFDR) for high speed, distributed fiber-optic sensing. The technique utilizes continuous gratings written in single mode fiber facilitating high density distributed measurements of temperature or strain up 1 millimeter resolution. The technology used herein is capable of strain measurement rates of up to 1 KHz over the measurement domain with millimeter resolution. This technique shows great utility as a method for dynamic structural health monitoring, model simulation validation for mechanical prototypes, vibration monitoring or closed loop feedback control for process optimization.
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高分辨率,动态应变测量与连续光纤布拉格光栅结构健康监测
我们描述了在高速、分布式光纤传感中使用扫描波长干涉测量法(有时称为光频域反射测量法,OFDR)。该技术利用单模光纤写入的连续光栅,可实现高达1毫米分辨率的高密度分布温度或应变测量。本文使用的技术能够在毫米分辨率的测量域中进行高达1khz的应变测量。该技术在结构动态健康监测、机械样机模型仿真验证、振动监测或过程优化闭环反馈控制等方面显示出巨大的实用性。
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