On-line structural damage localization and quantification using wireless sensors
Resource
Smart Materials and Structures, 20(10), 105025
Journal
Smart Materials and Structures
Pages
105025
Date Issued
2011
Date
2011
Author(s)
Abstract
In this paper, a wireless sensing system is designed to realize on-line damage localization and quantification of a structure using a frequency response function change method (FRFCM). Data interrogation algorithms are embedded in the computational core of the wireless sensing units to extract the necessary structural features, i.e.the frequency spectrum segments around eigenfrequencies, automatically from measured structural response for the FRFCM. Instead of the raw time history of the structural response, the extracted compact structural features are transmitted to the host computer. As a result, with less data transmitted from the wireless sensors, the energy consumed by the wireless transmission is reduced. To validate the performance of the proposed wireless sensing system, a six-story steel building with replaceable bracings in each story is instrumented with the wireless sensors for on-line damage detection during shaking table tests. The accuracy of the damage detection results using the wireless sensing system is verified through comparison with the results calculated from data recorded of a traditional wired monitoring system. The results demonstrate that, by taking advantage of collocated computing resources in wireless sensors, the proposed wireless sensing system can locate and quantify damage with acceptable accuracy and moderate energy efficiency. © 2011 IOP Publishing Ltd.
SDGs
Other Subjects
Computational core; Computing resource; Damage localization; Eigen frequencies; Frequency response functions; Frequency spectra; Host computers; Interrogation algorithms; Monitoring system; Shaking table tests; Steel buildings; Structural damage localization; Structural feature; Structural response; Time history; Wireless sensing; Wireless sensor; Wireless transmissions; Energy efficiency; Frequency response; Sensors; Spectroscopy; Structural analysis; Telephone systems; Damage detection
Type
journal article
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