Determination and mapping of measurement and design coordinate systems using computational geometric techniques |
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Authors: | GL Samuel Seung-Han Yang |
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Affiliation: | (1) School of Mechanical Engineering, Kyungpook National University, Daegu, 702-701, South Korea |
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Abstract: | Automotive industry is one of the most prospective manufacturing industries in the present world. In order to keep up with
the challenges of competitors, the automobile industries are taking necessary steps to satisfy the customers by supplying
products of good quality at lower cost. The machine vision inspection systems play an important role in quality control with
their accurate dimensional measurement capability. The data obtained from these systems have to be analyzed using appropriate
algorithms. In the present work, algorithms based on computational geometric techniques have been developed, to set up the
coordinate system for the data obtained from the laser vision system for subframe and lower arm assembly of automobile front
chassis module. The concept of a convex hull and a modified Voronoi diagram are utilized for establishing the coordinate system
for measurement data. The design coordinate system is determined using the Voronoi diagrams. The measurement and design coordinate
systems are mapped using 3D transformations. The results obtained for the sample data are also presented in this paper. |
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Keywords: | Computational geometry Convex hull Coordinate system Machine vision System Voronoi diagram |
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