This paper proposes a practical videogrammetric technique to measure shaking table tests of multi-layer structure models using two CMOS cameras. Three major issues, including high-speed videogrammetric hardware system configuration and network configuration, image sequence processing, and deformation information retrieval, are studied. The implementation of the proposed method is illustrated with a shaking table experiment for a multi-layer reinforced concrete structure in Tongji University, Shanghai. Sub-millimeter-level accuracy for the deformation measurements was achieved with the image resolution of 1280 (H) by 1024 (V) pixels. The velocity and acceleration of the shaking table structure are obtained accordingly. The results from the videogrammetric technique are compared with those from the traditional gauging and accelerometer methods. The experimental results show that, when compared with the traditional methods, the proposed videogrammetric method measures the deformation with sub-millimeter accuracy and can obtain more detailed peak values at the critical points on the shaking table structure.
|Measurement: Journal of the International Measurement Confederation
|Published - Mar 15 2020
- High-speed CMOS camera
- Shaking table
ASJC Scopus subject areas
- Electrical and Electronic Engineering