IFSTTAR, COSYS-SII, Route de Bouaye, F-44344 Bouguenais, France.
Inria, Team I4S, Campus de Beaulieu, F-35042 Rennes, France.
Sensors (Basel). 2019 Jan 16;19(2):356. doi: 10.3390/s19020356.
The assessment of Coda Wave Interferometry (CWI) and Distributed Fiber Optics Sensing (DFOS) techniques for the detection of damages in a laboratory size reinforced concrete beam is presented in this paper. The sensitivity of these two novel techniques to micro cracks is discussed and compared to standard traditional sensors. Moreover, the capacity of a DFOS technique to localize cracks and quantify crack openings is also assessed. The results show that the implementation of CWI and DFOS techniques allow the detection of early subtle changes in reinforced concrete structures until crack formation. With their ability to quantify the crack opening, following early detection and localization, DFOS techniques can achieve more effective monitoring of reinforced concrete structures. Contrary to discrete sensors, CWI and DFOS techniques cover larger areas and thus provide more efficient infrastructures asset management and maintenance operations throughout the lifetime of the structure.
本文介绍了用于检测实验室尺寸增强混凝土梁损伤的连续波干涉测量（CWI）和分布式光纤传感（DFOS）技术的评估。讨论了这两种新技术对微裂缝的敏感性，并将其与标准传统传感器进行了比较。此外，还评估了 DFOS 技术定位裂缝和量化裂缝开度的能力。结果表明，CWI 和 DFOS 技术的实施允许检测到钢筋混凝土结构中的早期细微变化，直到裂缝形成。通过量化裂缝开度，在早期检测和定位之后，DFOS 技术可以实现对钢筋混凝土结构的更有效监测。与离散传感器不同，CWI 和 DFOS 技术覆盖更大的区域，从而在结构的整个生命周期内提供更有效的基础设施资产管理和维护操作。
