第21卷第1期
2013年1月文章编号
1004-924X(2013)01-0181-08
光学精密工程
Optics and Precision Engineering
鞋檀定制中非均匀有理B样条特征
曲线的自适应变形任怀艺，王伯雄，刘辉，罗秀芝
（清华大学精密仅器与机械学系，北京100084）
Vol. 21No.1
Jan.2013
摘要：为实现无实体植基础的数字化量足制鞋，提出了基于非均匀有理B样条(NURBS)特征曲线自适应变形的个性化鞋植定制系统，将足部NURBS特征曲线依据一定的舒适度规则变形成相应的鞋特征曲线来实现鞋棺定制。该系统采用切平面法获取足部的特征点、特征曲线和特征尺寸，重建出足部NURBS特征曲线。建立了足舒适度匹配规则，并根据变形方式及次序不同将特征曲线分为四种类型。以特征点、特征结点和特征尺寸作为约束，结合足植舒适度规律驱动足部特征曲线自适应变形，生成相应的鞋植特征曲线。最后，构建出鞋植特征框架，通过特征曲线增添操作和曲面细分造型完成定制鞋檀的设计。给出了男士皮鞋鞋植的设计实例和定制结果，定制时间在480s内，定制的鞋植美观大
方。该系统具有实用性，且定制鞋植的再设计利用率显著提高，关键
调：足部特征信息；非均匀有理B样条特征由线；驻检定制；自适应变形；舒适度匹配规则
中图分类号：TP391,7;TS943.2
文献标识码：A
doi:10,3788/OPE,20132101.0181
Adaptive deformation of characteristic NURBS curves
forcustomizedshoe-last
REN Huai-yi, WANG Bo-xiong', LIU Hui, LUO Xiu-zhi(Department of Precision Instruments and Mechanology,
TsinghuaUniversity，Beijing100084，China)
*Correspondingauthor,E-mail:wangbz@tsinghua.edu.cn
Abstract: To make customized shoes without standard shoe-lasts, a customized shoe-last system is es-tablished based on the adaptive deformation of Nonuniform Rational B Spline (NURBS) curves for foot characteristics. The system uses the deformation from foot characteristic curves to make shoe lasts based on comfortable matching rules. First, the cutting plane method is used to acquire the char-acteristic information, including characteristic points, characteristic curves and characteristic sizes, following that, the characteristic curves are reconstructed in NURBS. Then, the comfortable matc hing rules between feet and shoe-lasts are established, and characteristic curves are divided into four different types according to different deformation ways and orders. Furthermore, the foot characteris-tic curves are deformed to shoe-last's characteristic curves driven by the comfortable match rules in the constraints of the characteristic points, characteristic nodes and the characteristic sizes, Finally, it structures the shoe-last's characteristic frame, and finishes the design of customized shoe-last through adding characteristic curves and subdividing the surface mesh of shoe-last. With this system, a men's
收稿日期：2012-09-28；修订日期：2012-10-17.
基金项目：国家863高技术研究发展计划资助项目（No.2008AA042207）