Abstract
As a novel three dimensional digital image correlation (3D DIC) method, the bi-prism-based single lens (BSL) 3D DIC method has been proposed and developed in recent years. Making use of a bi-prism, this method is able to perform a 3D DIC measurement using only a single camera. Thus, the integration level of a BSL 3D DIC system could be much higher than that of the double-camera 3D DIC system. In this paper, using a small-angle bi-prism and a camera with a longer focal length, a special BSL 3D DIC system with a long working distance is designed for measurements in extreme environments. The principle of the system is first studied, and practical methods are then proposed for the system set-up and the determination of system parameters. Then, feasibility of the measurement system is verified by out-of-plane rigid-body translation tests. Finally, the BSL 3D DIC system is proven to be capable of combining with a high-temperature testing instrument to perform deformation tests in a high-temperature environment of up to 1500°C.
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Wu, L., Yin, Y., Zhang, Q. et al. Bi-prism-based single-lens three dimensional digital image correlation system with a long working distance: Methodology and application in extreme high temperature deformation test. Sci. China Technol. Sci. 61, 37–50 (2018). https://doi.org/10.1007/s11431-017-9082-3
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DOI: https://doi.org/10.1007/s11431-017-9082-3