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- W2566237788 abstract "Geometric inspection of non-rigid (flexible) parts in free-state can aid manufacturers to automatically and inexpensively improve quality by detecting defects on manufactured parts. Non-contact optic data acquisition devices (scanners) are used to measure point clouds on the boundary of manufactured part in free-state and compare it with its nominal computer aided design (CAD) model in a common coordinate system. In the case of non-rigid parts, deformation during free-state inspection, mostly due to weight and to residual stresses, causes specific problems since this deformation has to be distinguished from defects. In this study the generalized numerical inspection fixture (GNIF) method is applied to generate a prior set of corresponding sample points between CAD and scanned models. These points are then used to deform the CAD model to conform to scanned data, through finite element non-rigid registration. Corresponding sample points generated using GNIF are evenly distributed over both models. Therefore, some sample points may be located on defects, which makes that these defects cannot be measured accurately. In this paper we introduce a method, aimed at automatically removing these sample points, which is based on von Mises stress and curvature criteria. Once removed, these points are no longer used in non-rigid FEA registration, which makes that associated defects can be identified and measured accurately." @default.
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- W2566237788 date "2015-01-01" @default.
- W2566237788 modified "2023-09-27" @default.
- W2566237788 title "An improvement of fixtureless inspection for non-rigid parts based on filtering sample points" @default.
- W2566237788 hasPublicationYear "2015" @default.
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