基于显微聚焦的磨头表面测量与三维重构
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TP391

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中央高校基本科研业务费项目中国民航大学专项资助(3122020034)


Surface measurement and three-dimensional reconstruction of grinding head based on microscopic focusing
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    摘要:

    为定量分析磨头表面磨粒形状、尺寸和分布状态,提出一种基于显微聚焦原理的表面测量与重构方法。首先给出了根据显微聚焦原理的定焦准平面测量和三维重构策略。然后针对测量策略中关键的聚焦或离焦程度分析,推导构建了背景差、灰度差和梯度差相结合的聚焦锐度函数。并采用正态高斯插值方法解决了图像离散采集存在错失最佳聚焦位置或焦准平面的问题,给出了任意像素位置对应点的空间坐标。最后通过电子金相显微镜上进行的磨头表面图像采集和三维重构实验表明,该方法重构表面磨粒的形状、尺寸、分布均与实际磨头基本一致,磨粒最大特征尺寸误差可控制在2 μm以内,最大分布误差在3 μm以内,具有较好的准确性和可靠性。

    Abstract:

    In order to quantitatively analyze the shape, size and distribution of abrasive particles on the surface of grinding head, A surface measurement and reconstruction method based on microscopic focusing principle is proposed. Firstly, according to the principle of microscopic focusing, the method of fixed-focus plane measurement and three-dimensional reconstruction is given. Then, aiming at the key focus or defocus degree analysis in the measurement method, the focus sharpness function combining background difference, gray difference and ladder difference is deduced and constructed. And the problem of missing the best focus position or focal plane in discrete image acquisition is solved by using the normal Gaussian interpolation method, and the spatial coordinates of the corresponding points of any pixel position are given. Finally, the surface image acquisition and three-dimensional reconstruction experiments of the grinding head on the electron metallographic microscope show that the shape, size and distribution of the reconstructed surface abrasive particles are basically consistent with the actual grinding head. The maximum characteristic size error of abrasive particles can be controlled within 2 μm, and the maximum distribution error is within 3 μm, which has good accuracy and reliability.

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黎柏春,李晓坤,侯胜辉,等. 基于显微聚焦的磨头表面测量与三维重构[J]. 科学技术与工程, 2023, 23(28): 12152-12158.
Li Baichun, Li Xiaokun, Hou Shenghui, et al. Surface measurement and three-dimensional reconstruction of grinding head based on microscopic focusing[J]. Science Technology and Engineering,2023,23(28):12152-12158.

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历史
  • 收稿日期:2023-02-15
  • 最后修改日期:2023-07-16
  • 录用日期:2023-03-23
  • 在线发布日期: 2023-09-28
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