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- W2980766054 abstract "This study proposes a novel vision-based measurement method to capture small dynamic displacements at many points on a large-scale structure. The measurement points are aligned in the depth direction so that all points are observable in a single field of view with a high power zoom lens. To cope with insufficient incident light and lens blur when capturing video in a limited depth of field with large magnification, our method used highly retroreflective cubes as markers, combined with a strong coaxial lighting device for measuring image displacements with a tandem-layout in images. We conducted experiments to measure dynamic displacements of a 4 m long truss bridge model, and 18 corner cubes were attached as retroreflective markers. 752×2048 images were captured with a coaxial lighting device at 240 fps. The experimental results show that the deformation of the bridge model, its resonant frequencies, and mode shapes at a frequency of dozens of Hz can be determined by analyzing images captured from a single camera view." @default.
- W2980766054 created "2019-10-25" @default.
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- W2980766054 date "2019-10-20" @default.
- W2980766054 modified "2023-10-03" @default.
- W2980766054 title "A Tandem Marker-Based Motion Capture Method for Dynamic Small Displacement Distribution Analysis" @default.
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- W2980766054 doi "https://doi.org/10.20965/jrm.2019.p0671" @default.
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