基于三维足形与足底压力分布的鞋垫参数化定制设计

Parametric custom design of insoles based on 3D foot shape and plantar pressure distribution

为降低足底压力峰值、提升鞋垫产品的舒适性,达到预防足部相关疾病的目的,提出了一种以三维足部模型与足底压力分布为驱动的多孔结构鞋垫参数化定制设计方法。首先,依据用户三维足部模型及相关足部尺寸参数构建了自动生成高适配性鞋垫模型的方法;其次,基于图像采样算法建立了用户足底压力分布向鞋垫空间结构密度分布的映射点集,以此为数据基础,通过Voronoi3D工具在鞋垫模型限定域内生成空间单元结构;最后,提取适应鞋垫模型边界的Voronoi骨架线,并结合网格生成算法建立多孔鞋垫网格模型。动态及静态足底压力实验结果表明,与传统鞋垫的性能相比,基于足形和足压分布定制设计的多孔鞋垫可以有效卸载足底压力峰值、增大足底的接触面积及提升左右足部压力分布的对称性。

To reduce peak plantar pressure,enhance the comfort of insole products,and prevent foot-related diseases,a process for designing parametric,customized,porous insoles was proposed.This process was driven by a three-dimensional foot model and plantar pressure distribution.First,a method was constructed for the automatic generation of highly adaptive insole models using the user’s three-dimensional foot model and relevant foot dimension parameters.Secondly,an image sampling algorithm was employed to establish a mapping point set for the distribution of plantar pressure on the user’s foot to the spatial density distribution in the insole.This served as the foundational data for generating spatial unit structures within the defined domain of the insole model through the Voronoi 3D tool.Finally,Voronoi skeletal lines adapted to the insole model’s boundary were extracted,and a porous insole mesh model was established by integrating a mesh generation algorithm.Dynamic and static plantar pressure experimental results indicated that,compared to traditional insoles,porous insoles designed based on foot shapes and pressure distribution could effectively reduce peak plantar pressure,increase the contact area on the plantar surface,and improve the symmetry of pressure distribution between the left and right feet.