利用掺金纳米粒子分布式光纤传感技术提高应变测量灵敏度

IF 4.6 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Structural Control & Health Monitoring Pub Date : 2024-04-02 DOI:10.1155/2024/2716156
Xiang Wang, Yuzhe Xiao, Calvin Rans, Rinze Benedictus, Roger M. Groves
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引用次数: 0

摘要

掺杂纳米粒子(NP)的光纤有可能提高信噪比,从而提高光纤应变检测的灵敏度,用于结构健康监测。本文将先前的实验/模拟研究扩展到应变监测的设计研究。在光纤纤芯中随机种入 100 nm 的球形金 NP,以增加背向散射光的强度。在红外线 C 波段附近的不同波长范围和不同的轨距长度下,获得了背向散射光光谱。通过对应变变化前后的光谱进行交叉相关,可获得光谱偏移值。结果表明,应变精度与相对光谱灵敏度呈正相关,应变精度随噪声的增加而降低。根据模拟结果,利用航空案例研究得出了掺 NP 光纤传感器的灵敏度公式,以提供实际应变值。在提高相对光谱灵敏度的基础上,提出了一种提高应变检测精度的改进方法,结果表明误差降低了约 50%,但代价是应变测量范围缩小,对噪声更加敏感。这些结果有助于将掺 NP 的光纤更好地应用于应变监测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Enhanced Strain Measurement Sensitivity with Gold Nanoparticle-Doped Distributed Optical Fibre Sensing

Nanoparticle- (NP-) doped optical fibres show the potential to increase the signal-to-noise ratio and thus the sensitivity of optical fibre strain detection for structural health monitoring. In this paper, our previous experimental/simulation study is extended to a design study for strain monitoring. 100 nm spherical gold NPs were randomly seeded in the optical fibre core to increase the intensity of backscattered light. Backscattered light spectra were obtained in different wavelength ranges around the infrared C-band and for different gauge lengths. Spectral shift values were obtained by cross-correlation of the spectra before and after strain change. The results showed that the strain accuracy has a positive correlation with the relative spectral sensitivity and that the strain precision decreases with increasing noise. Based on the simulated results, a formula for the sensitivity of the NP-doped optical fibre sensor was obtained using an aerospace case study to provide realistic strain values. An improved method is proposed to increase the accuracy of strain detection based on increasing the relative spectral sensitivity, and the results showed that the error was reduced by about 50%, but at the expense of a reduced strain measurement range and more sensitivity to noise. These results contribute to the better application of NP-doped optical fibres for strain monitoring.

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来源期刊
Structural Control & Health Monitoring
Structural Control & Health Monitoring 工程技术-工程:土木
CiteScore
9.50
自引率
13.00%
发文量
234
审稿时长
8 months
期刊介绍: The Journal Structural Control and Health Monitoring encompasses all theoretical and technological aspects of structural control, structural health monitoring theory and smart materials and structures. The journal focuses on aerospace, civil, infrastructure and mechanical engineering applications. Original contributions based on analytical, computational and experimental methods are solicited in three main areas: monitoring, control, and smart materials and structures, covering subjects such as system identification, health monitoring, health diagnostics, multi-functional materials, signal processing, sensor technology, passive, active and semi active control schemes and implementations, shape memory alloys, piezoelectrics and mechatronics. Also of interest are actuator design, dynamic systems, dynamic stability, artificial intelligence tools, data acquisition, wireless communications, measurements, MEMS/NEMS sensors for local damage detection, optical fibre sensors for health monitoring, remote control of monitoring systems, sensor-logger combinations for mobile applications, corrosion sensors, scour indicators and experimental techniques.
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