Wavelet De-noising of GNSS Based Bridge Health Monitoring Data
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Abstract
GNSS signal multipath occurs when the GNSS signal reflects of objects in the antenna environment and arrives at the antenna via multiple paths. A bridge environment is one that is prone to multipath with the bridge structure, as well as passing vehicles providing static and dynamic sources of multipath. In this paper, the Wavelet Transform (WT) is applied to bridge data collected on the Machang cable stayed bridge in Korea. The WT algorithm was applied to the GNSS derived bridge defection data at the mid-span. Up to 41% improvement in RMS was observed afterwavelet shrinkage de-noisingwas applied.Application of this algorithm to the torsion data showed significant improvement with the residual average and RMS decreased by 40% and 45% respectively. This method enabled the generation of more accurate information for bridge health monitoring systems in terms of the analysis of frequency, mode shape and three dimensional defections.
© 2014 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Masthead
- Editorial
- Editorial to the Special Edition of the JAG on Engineering Geodesy
- Research Articles
- A Tale of Five Bridges; the use of GNSS for Monitoring the Deflections of Bridges
- Optimal GPS/accelerometer integration algorithm for monitoring the vertical structural dynamics
- Wavelet De-noising of GNSS Based Bridge Health Monitoring Data
- Utility Theory as a Method to Minimise the Risk in Deformation Analysis Decisions
- Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
- Influence of surface reflectivity on reflectorless electronic distance measurement and terrestrial laser scanning
- Experts View
- Engineering Geodesy - Definition and Core Competencies
Articles in the same Issue
- Masthead
- Editorial
- Editorial to the Special Edition of the JAG on Engineering Geodesy
- Research Articles
- A Tale of Five Bridges; the use of GNSS for Monitoring the Deflections of Bridges
- Optimal GPS/accelerometer integration algorithm for monitoring the vertical structural dynamics
- Wavelet De-noising of GNSS Based Bridge Health Monitoring Data
- Utility Theory as a Method to Minimise the Risk in Deformation Analysis Decisions
- Aiming at self-calibration of terrestrial laser scanners using only one single object and one single scan
- Influence of surface reflectivity on reflectorless electronic distance measurement and terrestrial laser scanning
- Experts View
- Engineering Geodesy - Definition and Core Competencies
