Spectral analysis for tilted fiber Bragg gratings in the corrosion detection for concrete structure

IF 0.7 4区 物理与天体物理 Q4 OPTICS Optica Applicata Pub Date : 2022-01-01 DOI:10.37190/oa220309
Kok Zee Kwong, W. Udos, Kok-Sing Lim, Foo Wei Lee, Chee Ghuan Tan, M. Z. Samion, H. Ahmad
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Abstract

An effective corrosion monitoring technique is sought after by the engineers for assessing the steel bar corrosion at the early stage for the maintenance and repair works, especially in the corrosive environments, such as coastal and marine. In this work, tilted fiber Bragg grating (TFBG) with the optical sensor is employed in corrosion monitoring of a reinforced concrete structure. Taking advantage of the high sensitivity of TFBG cladding resonance wavelengths to the change in the surrounding medium, the sensor is mounted on the steel bar that is embedded in a concreted block during an accelerated corrosion process. The acquired transmission spectrum of the TFBG during the procedure is digitally processed using Fourier Transform to produce an index that is sensitive to the generated corrosion product surrounding the TFBG sensor. This eases the analysis of the sophisticated TFBG transmission spectra. The generated index can be used as an indicator (indicator J) for the corrosion process of the embedded steel bar in the concrete structure. This indicator J can act as an indicator to describe the corrosion activity and corrosion level at a specific point of the steel bar in concrete structures.
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倾斜光纤布拉格光栅在混凝土结构腐蚀检测中的光谱分析
一种有效的腐蚀监测技术被工程师们所追求,以便在维护和维修工程的早期阶段对钢筋的腐蚀进行评估,特别是在腐蚀性环境中,如沿海和海洋。本文将倾斜光纤布拉格光栅(TFBG)与光学传感器一起应用于钢筋混凝土结构的腐蚀监测。利用TFBG包层共振波长对周围介质变化的高灵敏度,该传感器安装在钢筋上,在加速腐蚀过程中嵌入混凝土块中。在此过程中获得的TFBG透射谱使用傅里叶变换进行数字处理,以产生对TFBG传感器周围产生的腐蚀产物敏感的指数。这简化了复杂的TFBG透射谱的分析。生成的指标可作为混凝土结构中预埋钢筋腐蚀过程的指标(指标J)。该指标J可以作为描述混凝土结构中钢筋某一点腐蚀活性和腐蚀程度的指标。
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来源期刊
Optica Applicata
Optica Applicata 物理-光学
CiteScore
1.00
自引率
16.70%
发文量
21
审稿时长
4 months
期刊介绍: Acoustooptics, atmospheric and ocean optics, atomic and molecular optics, coherence and statistical optics, biooptics, colorimetry, diffraction and gratings, ellipsometry and polarimetry, fiber optics and optical communication, Fourier optics, holography, integrated optics, lasers and their applications, light detectors, light and electron beams, light sources, liquid crystals, medical optics, metamaterials, microoptics, nonlinear optics, optical and electron microscopy, optical computing, optical design and fabrication, optical imaging, optical instrumentation, optical materials, optical measurements, optical modulation, optical properties of solids and thin films, optical sensing, optical systems and their elements, optical trapping, optometry, photoelasticity, photonic crystals, photonic crystal fibers, photonic devices, physical optics, quantum optics, slow and fast light, spectroscopy, storage and processing of optical information, ultrafast optics.
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