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Target-free approach for vision-based structural system identification using consumer-grade cameras.
- Source :
-
Structural Control & Health Monitoring . Dec2016, Vol. 23 Issue 12, p1405-1416. 12p. - Publication Year :
- 2016
-
Abstract
- Recent reports on America's infrastructure have emphasized the importance of structural health monitoring of civil infrastructures. System identification is a key component of many structural health monitoring strategies. Current system identification methods estimate models of a structure by measuring displacements, accelerations, and strains with wired or wireless sensors. However, these methods typically involve installation of a limited number of sensors at discrete locations and require additional data acquisition devices. To overcome these limitations, computer vision-based techniques have been introduced recently that employ high-speed and high-resolution cameras. Such cameras can be quite costly and require tedious installation of targets. This paper investigates the potential of using consumer-grade cameras for structural system identification without the need to install targets. The underlying methods for target-free displacement measurements are introduced, including region of interest selection, feature detection, point tracking, and outlier removal. A set of experiments are conducted to assess the efficacy of the proposed approach by comparing the accuracy of the identified model with one obtained using a conventional wired system. Careful comparison of the results demonstrates the significant potential of the proposed approach. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15452255
- Volume :
- 23
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Structural Control & Health Monitoring
- Publication Type :
- Academic Journal
- Accession number :
- 119239186
- Full Text :
- https://doi.org/10.1002/stc.1850