https://scholars.lib.ntu.edu.tw/handle/123456789/576833
標題: | Infrared thermography measurement for vibration-based structural health monitoring in low-visibility harsh environments | 作者: | He J.-H Liu D.-P Chung C.-H Huang H.-H. HSIN-HAOU HUANG |
關鍵字: | Structural frames; Thermography (imaging); Infrared thermal imager; Inherent limitations; Large scale structures; Mode shape curvatures; Recombination methods; Satisfactory modeling; Structural measurements; Vibration-based structural health monitoring; Structural health monitoring | 公開日期: | 2020 | 卷: | 20 | 期: | 24 | 起(迄)頁: | 1-15 | 來源出版物: | Sensors (Switzerland) | 摘要: | In this study, infrared thermography is used for vibration-based structural health monitoring (SHM). Heat sources are employed as sensors. An acrylic frame structure was experimentally investigated using the heat sources as structural marker points to record the vibration response. The effectiveness of the infrared thermography measurement system was verified by comparing the results obtained using an infrared thermal imager with those obtained using accelerometers. The average error in natural frequency was between only 0.64% and 3.84%. To guarantee the applicability of the system, this study employed the mode shape curvature method to locate damage on a structure under harsh environments, for instance, in dark, hindered, and hazy conditions. Moreover, we propose the mode shape recombination method (MSRM) to realize large-scale structural measurement. The partial mode shapes of the 3D frame structure are combined using the MSRM to obtain the entire mode shape with a satisfactory model assurance criterion. Experimental results confirmed the feasibility of using heat sources as sensors and indicated that the proposed methods are suitable for overcoming the numerous inherent limitations associated with SHM in harsh or remote environments as well as the limitations associated with the SHM of large-scale structures. ? 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097620825&doi=10.3390%2fs20247067&partnerID=40&md5=d11011e3e7e91f7199b90648596fb318 https://scholars.lib.ntu.edu.tw/handle/123456789/576833 |
ISSN: | 14248220 | DOI: | 10.3390/s20247067 |
顯示於: | 工程科學及海洋工程學系 |
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