基于人体臂部的连续动态服装压力预测模型及准确性表征方法  

Continuous dynamic clothing pressure prediction model based on human armand accuracy characterization method

作　　者：谢红[1] 张林蔚 沈云萍 XIE Hong;ZHANG Linwei;SHEN Yunping(School of Textile and Fashion,Shanghai University of Engineering and Technology,Shanghai 201620,China)

机构地区：[1]上海工程技术大学纺织服装学院,上海201600

出　　处：《纺织学报》2024年第7期150-158,共9页Journal of Textile Research

基　　金：国家重点研发计划重点专项项目(2018YFC2000901)。

摘　　要：通过建立人体臂部与弹性压力臂套的三维有限元模型,对弹性压力臂套的穿套过程及人体肘关节着装后屈曲的2种工况进行数值模拟,计算得到人体臂部软组织外表面及弹性压力臂套随时间变化的等效应力;基于此数据建立线性回归模型,选取均方根误差作为线性回归模型表征指标,以用于表征织物基传感器测试的准确性。最后对模型进行应用,在有限元模型中选取臂部肘关节外侧屈曲点处,提取此处随时间变化的应力曲线,基于曲线上的特征点建立线性回归模型;选取2种柔性传感器,将其缝制在与模型屈曲点处同样的位置,测试匀速屈肘时的电信号数据,并通过力电耦合模型将电信号转换为应力值。选取均方根误差(RMSE)作为表征线性回归模型的指标,对2种传感器测试数据进行分析,结果显示其中一款传感器的测试值的回归效果与真实值的差距较小,可以认为此传感器运用于肘部弯曲测试准确度更高,效果更好。Objective With the development and application of flexible sensing technology,there is an urgent need for accurate evaluation of detected results,because there is no mature evaluation standard at present.For the fabric-type sensors,the output of its detection signal is closely related to the changing curvature of the human surface and the physical parameters of the material itself.Therefore,this study attempts to establish a continuous dynamic pressure finite element model for the interface between the human body and clothing,soas to provide theoretical basis for assessing the output accuracy of the fabric-type sensor.It could be used to characterize the accuracy of flexible sensing technology in practical application,so as to further promote the industrialization of smart wearable products.Method In this research,the human arm is selected as the research object,and a three-dimensional finite element model of the human arm and the elastic pressure arm sleeve is established,based on the finite element principle.The processes of putting the elastic cuff around the human arm and the buckling of the human elbow joint after wearing the elastic arm sleeve are numerically simulated,and the equivalent stress of the soft tissue external surface of the human arm and the elastic pressure arm sleeve changing with time is calculated.Based on the data,a linear regression model was established,and root-mean-square error(RMSE)was selected as the representation index of the linear regression model to characterize the accuracy of the textile flexible sensor test.Results In order to simplify the model,the fabric and bone were assumed to be isotropic linear elastomer,and the soft tissue was assumed to be isotropic hyper-elastomer.When the pressure arm sleeve was worn to the human arm,16 points were determined according to the shape of the pressure arm.The effectiveness of the model was verified,and the relative error between the simulated value and the measured value was analyzed.The results showed that except for the outer part of

关 键 词：织物基传感器 连续动态压力 数值模拟 服装压力 人体臂部 压力臂套 

分 类 号：TS941.7[轻工技术与工程—服装设计与工程]