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Sensors 2017, 17(5), 1054; doi:10.3390/s17051054

Inspection and Reconstruction of Metal-Roof Deformation under Wind Pressure Based on Bend Sensors

School of Automation Science and Electrical Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, Beijing 100191, China
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Academic Editors: Cheng-Chi Wang and Ming-Tsang Lee
Received: 30 December 2016 / Revised: 29 April 2017 / Accepted: 3 May 2017 / Published: 6 May 2017
(This article belongs to the Special Issue Innovative Sensing Control Scheme for Advanced Materials)

Abstract

Metal roof sheathings are widely employed in large-span buildings because of their light weight, high strength and corrosion resistance. However, their severe working environment may lead to deformation, leakage and wind-lift, etc. Thus, predicting these damages in advance and taking maintenance measures accordingly has become important to avoid economic losses and personal injuries. Conventionally, the health monitoring of metal roofs mainly relies on manual inspection, which unavoidably compromises the working efficiency and cannot diagnose and predict possible failures in time. Thus, we proposed a novel damage monitoring scheme implemented by laying bend sensors on vital points of metal roofs to precisely monitor the deformation in real time. A fast reconstruction model based on improved Levy-type solution is established to estimate the overall deflection distribution from the measured data. A standing seam metal roof under wind pressure is modeled as an elastic thin plate with a uniform load and symmetrical boundaries. The superposition method and Levy solution are adopted to obtain the analytical model that can converge quickly through simplifying an infinite series. The truncation error of this model is further analyzed. Simulation and experiments are carried out. They show that the proposed model is in reasonable agreement with the experimental results. View Full-Text
Keywords: metal roof; fast reconstruction model; bend sensor; elastic thin plate metal roof; fast reconstruction model; bend sensor; elastic thin plate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, L.; Cui, L.; Li, Y.; An, C. Inspection and Reconstruction of Metal-Roof Deformation under Wind Pressure Based on Bend Sensors. Sensors 2017, 17, 1054.

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