PDF(Pubmed)
Abstract：
Online measurement of disk part dimensions by the standard industrial camera features low cost, high efficiency and good universality, but the impact of projection distortion and end face chamfer on measurement is needed to overcome. Present work presents a measurement method to resolve above issues based on machine vision. To improve the measurement accuracy, lower end face of a disk part is determined as calibration plane and the upper end face is measurement plane. To reduce the impact of projection distortion and chamfer on measurement, the measurement points are reconstructed on the measurement plane by re-projection. Then, the inner and outer diameters of disk parts are measured by circle geometric fitting, and the thickness is calculated by the measurement plane position. The experimental results show that the method can online measure disk part dimensions just by a single image, and accuracy meets the requirements of universal grade disk parts.
摘要：
通过标准工业相机在线测量磁盘部件尺寸的特点是成本低，效率高，通用性好，但是需要克服投影畸变和端面倒角对测量的影响。提出了一种基于机器视觉的测量方法来解决上述问题。为了提高测量精度，盘部件的下端面被确定为校准平面,并且上端面被确定为测量平面。为了减少投影变形和倒角对测量的影响，通过重新投影在测量平面上重建测量点。然后，圆盘零件的内径和外径通过圆形几何拟合测量，厚度由测量平面位置计算。实验结果表明,该方法可以通过单幅图像在线测量圆盘零件尺寸,和精度满足通用级圆盘零件的要求。
