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Development of style design system based on the existing physical object

基于现有实物的风格设计系统开发

基本信息

批准号：
17560130
负责人：
GOTOH Takayuki
金额：
$ 1.6万
依托单位：
Asahikawa National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560130/
关键词：
Reverse Engineering style design measured point data surface fitting NURBS Gaussian curvature difference method 形状計測意匠形状

项目摘要

In designing new-style products such as vehicle bodies, ship hulls, airplane fuselages and wings, shoe insoles, etc., the designer's intentions are initially represented in the form of an existing physical object made of clay or wood. Using an existing physical object is advantageous in the it enable the designer to easily materialize how it fells. Traditionally, manufacturing these products starts with making an existing physical object, and obtains stamps and dies from the existing physical object by copy-milling. Thus in manufacture based on the existing physical object, a mathematical model (CAD model) must be stored in computer as the three-dimensional (3-D) object from 3-D measured point data. This manufacturing process is called Reverse Engineering. In Reverse Engineering, it is important to measure the shape of a physical object at a high speed and in a high accuracy.This study, 3-D measured point data of discrete of an existing physical object is applied to free-form surfaces and it aims to establish the method to constructing a high-grade CAD model. NURBS(Non-Uniform Rational B-Spline) surfaces are fitted to the 3-D measured point data. This study confirmed the effectiveness of the shape evaluation method such as the Gaussian curvature to inspect at a simulation level the shape on the free-form surface that this study generated from the discrete 3-D measured point data. This report, to request Gaussian curvature, this study demonstrates the method of calculating the higher differential value that this study confirmed by the inspection experiment.

在设计车身、船体、飞机机身和机翼、鞋垫等新型产品时，设计师的意图最初是以现有的粘土或木质实物的形式表现出来的。使用现有的物理对象是有利的，因为它使设计师能够轻松地将其感觉具体化。传统上，这些产品的制造从制造现有的实物开始，并通过仿形铣削从现有的实物获得冲压和冲模。因此，在基于现有物理对象的制造中，必须将数学模型(CAD模型)作为来自3-D测量点数据的3-D对象存储在计算机中。这种制造过程被称为逆向工程。在逆向工程中，高速、高精度地测量实体的形状是非常重要的，本研究将已有实体离散的三维测量点数据应用于自由曲面，旨在建立高质量的CAD模型的方法。NURBS(非均匀有理B-Spline)曲面被拟合到三维测量点数据。本研究验证了高斯曲率等形状评价方法在仿真水平上对由离散的三维测量点数据生成的自由曲面上的形状进行检测的有效性。本报告针对高斯曲率的要求，论证了本研究通过检验实验所证实的较高微分值的计算方法。