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

A propeller blade and self-adaptive measurement technology, applied in prediction, data processing application, calculation, etc., can solve the problems of poor surface description accuracy and low adaptability of measurement points, and achieve high accuracy and timeliness of adaptive interpolation approximation position High, improve the effect of automation

Pending Publication Date: 2022-02-25
JIANGSU UNIV OF SCI & TECH
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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

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

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Embodiment Construction

[0072] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0073] like figure 1 As shown, the present invention provides a T-spline-based propeller blade self-adaptive measurement point planning method. First, a coordinate system is established to extract the triangular patch vertex set through the 3D CAD model of the propeller blade, and the density area factor is adaptively generated; the radius K-Dtree search algorithm is used to sort the density descriptor and retain the original index; the density factor and the dense descriptor are integrated , divide the point sets of equal-constrained regions; construct the previous T-spline surface according to the division of the point set domain; generate the T-spline surface curve adaptively by curvature, and generate the initial measuring point set by combining the radial line of the equal-angle blade; the nearest point lacks replacement, and the base is ...

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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...

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Application Information

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IPC IPC(8): G06Q10/04
CPCG06Q10/047
Inventor 张辉张震鲍勃屹江新国张胜文方喜峰张春燕程德俊
Owner JIANGSU UNIV OF SCI & TECH
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