Coscetta Agnese, Minardo Aldo, Zeni Luigi
Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, Italy.
Sensors (Basel). 2020 Oct 1;20(19):5629. doi: 10.3390/s20195629.
Over the past three decades, extensive research activity on Brillouin scattering-based distributed optical fiber sensors has led to the availability of commercial instruments capable of measuring the static temperature/strain distribution over kilometer distances and with high spatial resolution, with applications typically covering structural and environmental monitoring. At the same time, the interest in dynamic measurements has rapidly grown due to the relevant number of applications which could benefit from this technology, including structural analysis for defect identification, vibration detection, railway traffic monitoring, shock events detection, and so on. In this paper, we present an overview of the recent advances in Brillouin-based distributed optical fiber sensors for dynamic sensing. The aspects of the Brillouin scattering process relevant in distributed dynamic measurements are analyzed, and the different techniques are compared in terms of performance and hardware complexity.
在过去三十年中,基于布里渊散射的分布式光纤传感器开展了广泛的研究活动,现已出现能够测量长达数公里距离且具有高空间分辨率的静态温度/应变分布的商业仪器,其应用通常涵盖结构和环境监测。与此同时,由于大量应用能够从该技术中受益,包括用于缺陷识别的结构分析、振动检测、铁路交通监测、冲击事件检测等,对动态测量的兴趣迅速增长。在本文中,我们概述了基于布里渊的分布式光纤传感器在动态传感方面的最新进展。分析了分布式动态测量中与布里渊散射过程相关的方面,并在性能和硬件复杂性方面对不同技术进行了比较。