Automated precision measurement of surface profile in CAD-directed inspection
Automated precision measurement of surface profile in CAD-directed inspection
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DOI：
10.1109/70.134279
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发表时间：
1992-04
期刊：
影响因子：
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通讯作者：
C. Menq;H. Yau;Gwan-Ywan Lai
中科院分区：
文献类型：
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作者：
C. Menq;H. Yau;Gwan-Ywan Lai
提出了一种优化匹配方案，使cad尺寸检测中的测量数据与设计数据保持一致。该方案的原理是通过最小化测量数据与表面相对于刚体变换参数的距离平方和来确定标称表面上的实际测量点。讨论了该算法的计算效率和对奇异性的鲁棒性。研究了两种应用。首先是根据机器坐标系确定设计坐标系。二是精度测量的对比分析。为了确定设计坐标系，提出了一种灵敏度测量方法，并进行了实验验证。为了进行误差比较分析，建立了一个统计模型，以确定所需的最小测量点数量，使采样点能够接近地代表整个人口。>
The authors present an optimal match scheme that aligns the measurement data with the design data in CAD-directed dimensional inspection. The principle of this scheme is to determine the actual measured points on the nominal surface by minimizing the sum of the squared distances of the measurement data from the surface with respect to the parameters of a rigid body transformation. Its computational efficiency and robustness against singularity are discussed. Two applications are examined. The first is determining the design coordinate system with respect to a machine coordinate system. The second is comparative analysis for precision measurement. For determining the design coordinate system, a sensitivity measure is proposed and confirmed experimentally. For error comparative analysis, a statistical model is developed to determine the minimum number of required measurement points so that the sampled points can closely represent the entire population. >