Propeller blade self-adaptive measuring point planning method based on T-spline

Abstract

The invention discloses a propeller blade adaptive measuring point planning method based on a T spline. The method comprises the following steps: (1) reading a propeller blade three-dimensional CAD model to extract a vertex set; (2) analyzing geometric topological information according to the vertex set to adaptively generate density factors; (3) establishing a density descriptor based on a K-Dtree search algorithm according to the vertex set; (4) integrating the density factor, the density description and other constraint segmentation regions, and generating a T spline representation original image; (5) generating a block basic measuring point set according to a self-adaptive sampling criterion according to the local domain; (6) constructing a T curve for the block basic measuring points, performing registration approximation with the initial characterization curve, and performing iterative interpolation to adaptively generate a result measuring point set; and (7) generating an intelligent planning path for the obtained result measuring point set according to a path optimization principle. The invention has good self-adaptability, can adapt to different models of propeller blades, is reasonable in measurement point arrangement and high in position coordinate precision, and realizes high-precision detection of the propeller blades.

Description

technical field [0001] The invention relates to the field of quality assessment of propeller blades, in particular to a T-spline-based self-adaptive measurement point planning method for propeller blades. Background technique [0002] Complex components are the core of marine components. As a large-scale free and complex curved surface workpiece, the fast, efficient, and stable precision measurement and detection of the propeller has become one of the main factors restricting its processing efficiency and quality accuracy. It is particularly important to plan the measuring points of the surface elements of the propeller blade to be tested, and then complete the product testing. At present, most enterprises use artificial pitch gauges, and the planning of measuring points for blades still needs to be estimated subjectively, resulting in large fluctuations in measurement accuracy and low descriptive power of measuring points. Although some institutions have carried out resear...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a T-spline-based self-adaptive measurement point planning method for propeller blades, thereby solving the problems of poor surface description accuracy and low adaptability of the measurement points

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