13 May 2013 Optical measurement system applied to continuous displacement monitoring of long-span suspension bridges
Author Affiliations +
Abstract
This paper provides a general description of main issues related to the design of an optical measurement system applied to continuous displacement monitoring of long-span suspension bridges. The proposed system’s architecture is presented and its main components - camera and active targets - are described in terms of geometrical and radiometric characteristics required for long distance measurement of the tridimensional displacement of the stiffness girder in the middle section of the bridge’s central span. The intrinsic and extrinsic camera parameterization processes, which support the adopted measurement approach, are explained in a specific section. Since the designed measurement system is intended to perform continuous displacement monitoring in long distance observation framework, particular attention is given to environmental effects, namely, refraction, turbulence and sensor saturation phenomena, which can influence the displacement measurement accuracy. Finally, a measurement uncertainty method is discussed in order to provide a suitable solution for the determination of the accuracy related to the proposed measurement approach.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
L. Lages Martins, L. Lages Martins, J. M. Rebordão, J. M. Rebordão, A. Silva Ribeiro, A. Silva Ribeiro, } "Optical measurement system applied to continuous displacement monitoring of long-span suspension bridges", Proc. SPIE 8788, Optical Measurement Systems for Industrial Inspection VIII, 87882M (13 May 2013); doi: 10.1117/12.2019996; https://doi.org/10.1117/12.2019996
PROCEEDINGS
8 PAGES


SHARE
Back to Top