布里渊光时域分析动态应变传感技术研究进展

doi:10.3969/j.issn.0255-8297.2020.02.001

Abstract

Abstract: Brillouin optical time domain analysis (BOTDA) has wide application prospects in health monitoring of large infrastructure and condition monitoring of aircraft, since it is capable of sensing distributed strain over long distance with high spatial resolution and accuracy. However, the sensing speed of conventional BOTDA is fairly slow and hardly realize dynamic strain measurement due to its frequency sweeping process. Aim at this problem, this paper reviews the research progress of BOTDA for dynamic strain sensing in recent years, including slope-assisted BOTDA (SA-BOTDA), fast BOTDA (F-BOTDA), sweep free BOTDA (SF-BOTDA) and dynamic BOTDA based on chirped pump/probe. The advantages and disadvantages of these technologies are discussed, and the development prospects of BOTDA for dynamic sensing are estimated as well.

Key words: optical fber sensor, Brillouin scattering, Brillouin optical time domain analysis (BOTDA), distributed strain sensing

CLC Number:

TN29

ZHU Tao, ZHENG Hua, ZHANG Jingdong. Progress in Research of Brillouin Optical Time Domain Analysis for Dynamic Strain Sensing[J]. Journal of Applied Sciences, 2020, 38(2): 197-214.

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Progress in Research of Brillouin Optical Time Domain Analysis for Dynamic Strain Sensing

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