Ms. Yihui Zhang Profile

Yihui Zhang

at Tianjin University

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Proceedings Article | 7 August 2015 Paper

Research on the multi-angle monocular coordinates measuring system for spatial points

Yihui Zhang, Changku Sun, Peng Wang, Pengfei Sun

Proceedings Volume 9623, 96230P (2015) https://doi.org/10.1117/12.2189032

KEYWORDS: Cameras, Imaging systems, Mathematical modeling, Electro optical modeling, Visual process modeling, Calibration, Sensors, Motion models, Visualization, CCD cameras

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To improve the accuracy of coordinate measurement, the precise 3D coordinates of spatial points on the surface of the target object are needed. Based on the stereo vision measurement model, an all-around coordinates measuring system with single camera and a two-dimensional turntable is proposed. By controlling the rotation of objects in two different orientations and by the principle of relative motion, the single-CCD sensor model was imaged as a visual multi-CCD sensor model. In other words, the visual CCD sensors at different but relative positions are used to acquire coordinates information of the measured points. Considering the calibration accuracy of those two shafts affecting the accuracy of the entire system, the mathematical calibration model is built, consisting of virtual multi-CCD sensor measuring system based on the non-orthogonal shafting. The shaft and its calibration method are described in detail. The experimental result shows that the system based on the virtual multi-CCD sensor model can achieve the standard deviation of 0.44mm, and thus proves the feasibility of its multi-angle coordinates measurement for spatial points.

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