期刊
IEEE-ASME TRANSACTIONS ON MECHATRONICS
卷 26, 期 3, 页码 1358-1368出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMECH.2020.3019288
关键词
Cameras; Displacement measurement; Temperature measurement; Reliability; Calibration; Transforms; IEEE transactions; Computer vision; coordinate transform; nontarget-based method; RGB-D camera; six-degrees-of-freedom (6-DOF) displacement
The article proposes a nontarget-based 6-DOF displacement measurement method using combined RGB and depth information. This method utilizes three-dimensional information of measurement points on the target structure obtained with the RGB-D camera and suggests a coordinate transform scheme to determine the 6-DOF displacement in the physical domain.
Structural displacement is an important physical quantity that provides essential information regarding the structural conditions and the safety of a structure. To date, a wide variety of displacement measurement methods have been developed. As a noncontact type of measurement, the computer-vision-based approach receives significant attention for its cost effectiveness, measurement convenience, and great performance. However, most existing methods are limited to one- or two-degrees-of-freedom (DOF) displacement measurement and require known dimensions of structural members or predefined target markers attached to the target structure, which limits real-world application. This article proposes a nontarget-based 6-DOF displacement measurement method using the combined RGB and depth information. The proposed method utilizes three-dimensional information of measurement points on the target structure obtained using the RGB-D camera, and suggests a coordinate transform scheme to determine the 6-DOF displacement in the physical domain. The proposed method is validated in two laboratory experiments using a shear building model and a pan-tilt with a measurement plate, in which both translational and rotational displacements are measured.
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