4.5 Article

Extracting Skeletons of Two-Manifold Triangular Mesh Surface for Planning Skeleton-Guided Five-Axis Surface Inspection Path

出版社

ASME
DOI: 10.1115/1.4054934

关键词

skeleton extraction; two-manifold triangle mesh; geodesic wave front propagation; surface partitioning; five-axis sweep scanning; CAD; CAM; CAE; inspection and quality control; process planning

资金

  1. Natural Science Foundation of Shanghai [22ZR1435200]
  2. Key Program of the National Natural Science Foundation of China [91948301]

向作者/读者索取更多资源

This paper presents a new approach to extract skeletons on a two-manifold triangle mesh with boundaries using wave front propagation. The experiments show that the proposed method can conveniently generate the five-axis sweep scanning path for complex free-form surfaces and has simpler and faster computation compared to state-of-the-art methods when the majority of the two-manifold triangle mesh is nearly planar.
Skeleton curve-guided five-axis sweep scanning is an emerging surface inspection technique with marvelous inspection efficiency. The precondition of applying such a technique to a complex surface is to extract the skeleton curves of a two-manifold surface associated with partitioning the surface into compact surfaces. However, the work on extracting skeletons of two-manifold triangle mesh surfaces is scarce, as existing skeletonization methods mostly focus on either 2D planar shapes or 3D solid shapes. In this paper, we present a new approach to extract the skeletons on a two-manifold triangle mesh with boundaries. The skeletons are formed in the most intuitive manner of wave front propagation which is based on computing the initial value problem of geodesics on a triangle mesh. The step-length of wave front propagation is adaptively controlled to guarantee the appropriate density of skeleton points for having good connectivity. Experiments show that, as a direct application of the proposed skeleton generation and its associated surface partitioning result, the five-axis sweep scanning path of complex free-form surface can be generated conveniently. Experimental results also validate that the computation of our proposed approach is simpler and faster than the state-of-the-art geodesic Voronoi diagram (GVD) method when most of the two-manifold triangle mesh is nearly planar. Additionally, the augmented parameter used for tracing the wave front's geodesic propagation information is helpful for the skeleton-based surface partition, which is necessary for skeleton curve-guided five-axis sweep scanning.

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