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Method for direct construction of blade point cloud model section curve based on sequence linear programming

A sequential linear programming and point cloud model technology, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as cross-section profile error and drastic changes in curvature direction, achieve reasonable curvature distribution, improve structural accuracy, avoid Effects of triangulation or surface parameterization

Active Publication Date: 2014-07-23
HUST WUXI RES INST
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Problems solved by technology

There is a discrete error when constructing a 3D image, and there is a large error in the initially extracted section line, and the curvature direction changes drastically

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  • Method for direct construction of blade point cloud model section curve based on sequence linear programming
  • Method for direct construction of blade point cloud model section curve based on sequence linear programming
  • Method for direct construction of blade point cloud model section curve based on sequence linear programming

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following examples are illustrative only, and are not construed as limiting the present invention.

[0039] The present invention is a method for directly constructing section curves of blade point cloud models based on sequential linear programming (LP), which aims at the scattered point cloud models of blades, establishes topological information through mathematical morphology, and constructs the distance between section curves and point cloud models function, using the optimization model of sequential linear programming to adjust the control points of the spline curve to realize the effective construction of the section curve, the method specifically includes the following steps:

[0040] S1: The 3D image of the scattered point cloud model is created by morphology, the ordered point set of the section is extracted, and the cubic ...

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Abstract

The invention discloses a method for direct construction of a blade point cloud model section curve based on sequence linear programming. According to a blade scattered point cloud model, topological structure information of blade scattered point cloud is established through mathematical morphology, the shape features of blades are utilized to establish a distance function of a blade section curve and a point cloud model to obtain a first-order differential increment, an optimized model of sequence linear programming is established, construction precision of the blade section curve is improved, and the curvature distribution of the section curve tends to be reasonable. According to the method, time-consuming severity and triangular meshing or curved surface parametrization in topological defects can be avoided, the section curve can be directly constructed through the blade scattered point cloud model, and blade quality detection efficiency is improved.

Description

technical field [0001] The invention belongs to the field of digitalized three-dimensional shape detection data processing of blade curved surfaces, in particular to a method for directly constructing section curves of blade point cloud models based on sequential linear programming. Background technique [0002] The blade point cloud model generally refers to the 3D point cloud data obtained by non-contact measurements such as laser scanners or flexible articulated arms. Blades with complex curved surfaces play an important role in industries such as aviation, ships, and nuclear power. They have technical characteristics such as thin-walled parts, difficult processing, easy deformation, and low damage. How to ensure their manufacturing accuracy has always been a research in the field of digital manufacturing. cutting edge. Most of the traditional methods handle the design, analysis, processing, and measurement stages of the manufacturing process independently, and there are...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 李文龙湛红晖李启东严思杰
Owner HUST WUXI RES INST
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