Interactive deformation and measurement simulation method for manually measuring girth of nonrigid limb

Abstract

The invention relates to the technical field of advanced manufacturing, in particular to an interactive deformation and measurement simulation method for manually measuring a girth of a nonrigid limb. The method comprises the following steps of: obtaining three-dimensional point cloud data of a limb surface through a laser scanner; obtaining a mesh surface model of the limb by using a triangular mesh reconstruction algorithm; defining a partial deformation area related to measurement and comprising a flexible rule coverage area, an external force spreading area and a compensation area and a control parameter; triangularizing the partial deformation area again to improve the mesh quality; dynamically calculating the change of a model volume when the limb deforms by utilizing the interactive deformation between a deformation simulation algorithm simulative flexible rule and the limb based on a mass-spring model; compensating the change of the volume by utilizing a volume compensation function; and calculating the girth by utilizing an RBF (Radial Basis Function) surface reconstruction algorithm based on the partial cloud point after the limb model deforms. The invention has visual effect and high measurement precision and satisfies the industrial requirement on time.

Description

technical field [0001] The invention relates to the field of advanced manufacturing technology, in particular to an interactive deformation and measurement simulation method for manual circumference measurement of non-rigid limbs. Background technique [0002] With the rapid development of the manufacturing industry, personalized product customization has more and more broad application prospects, and there is a huge demand in the world. In personalization, product comfort is always a key factor. Taking the manufacturing of footwear products as an example, in order to meet the comfort requirements, parameters such as length, width and circumference are often taken into account when comparing shoe lasts with feet. Usually the measurement of these parameters is done manually, but due to the error introduced by manual operation, the measurement data of different times or different people usually have deviations, so there is an urgent need for an automated measurement method to...

AI Technical Summary

Problems solved by technology

However, the accuracy of these measurement methods is directly or indirectly affected by the point cloud density. It can be seen that the automatic measurement of limb size still lacks the support of more accurate surface reconstruction algorithms based on point clouds.

Among many surface reconstruction algorithms, the RBF implicit surface reconstruction method can give more accurate interpolation results, but this method is global in nature and is usually used for the overall surface reconstruction of 3D models. Point cloud data often takes a lot of time

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