视觉准直在线实时测量技术的研究

This project presents a novel method to measure the straightness of the seamless steel pipes, which includes the design of the system, the deduction of mathematical model, and the research of the experimental results. A pair of line-structured lasers, which locate on different sides of the pipe but are in a common plane, cast on the pipe to create two elliptical arcs. Two CCD cameras capture these two arcs respectively. Major and minor axis radii and spatial 3D coordinates of every corresponding elliptical cross-section center can be calculated through ellipse fitting. A pair of line-structured laser sensors, each of which includes a line-structured laser and a CCD camera, are placed at every sampling cross-section of the pipe, and thus the pipe's diameter of the cross-section and furthermore the straightness of the pipe can be solved.

研究由线结构光传感器和计算机实时图象处理设备组成的视觉准直在线实时测量技术和三维视觉检测理论。应用多视觉传感器统一标定和并行处理技术，建立世界坐标系中虚拟直线基准，对被测直线方向若干截面进行实量同步采样，实现直线度在线非接触实时自动检测。给出空间直线度曲线，建立空间直线度准确的评定算法。填补国内外在此方面的空白。

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