基于压力垫系统的人体压力中心估计方法研究  

Study on the Evaluation of COP via Pressure Insole System

作　　者：王典[1] 毛志勇[1] 沙长源 蔡萍[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院仪器科学与技术系动态检测研究室,上海200240

出　　处：《传感技术学报》2014年第12期1596-1600,共5页Chinese Journal of Sensors and Actuators

基　　金：国家科技支撑计划重点项目(2009BAI71B06);国家自然科学基金重大项目(61190124)

摘　　要：为研究压力垫在静态平衡和步态检测两个方面替代测力台的可行性,深入比较了利用压力垫和测力台计算得到的压力中心(COP)的异同。利用了平衡功能综合测力台,其包括测量分布力的压力垫系统和集总力测力台系统;这两个系统同步采样,确保测量结果得以相互比较。18名被试者以双脚直立、倾斜、左右摇晃和单脚站立等站立姿态完成测试。并且通过被试者的步态数据利用线性回归的方法,建立行走中的压力中心坐标与压力敏感单元的模型。通过t-检验和相关系数来分析比较两个测量系统得到的结果;并且验证所建立的线性回归模型的准确性。经实验验证,两个系统计算得到的COP具有较高的一致性;分析比对结果表明按足底解剖结构放置8个压敏单元能够较为准确反映压力中心的动摇轨迹。To investigate the possibility of substituting force platform with pressure insole system in the analysis of COP and establishing a wearable static equilibrium or stepping intention analysis system,this study makes a thor-ough comparison between COP parameters obtained with the pressure insole system and the force platform respec-tively. The experiment set is a dedicatedly developed integrated measurement system which includes two measure-ment channels：pressure insole channel and force platform channel. The data of two channels are synchronously sam-pled that ensures the comparability of the two channels. Eighteen subjects are recruited for the data collection and the inspecting postures include bipedal upright stance,leaning,medio-lateral swing and standing on one leg. The re-sults of both channels were compared via student test and correlation analysis. It is demonstrated that the results ob-tained with pressure insole system agree well with the result got with the force platform and COP could be estimated accurately via the eight pressure cells placed under the foot.

关 键 词：压力中心 步态 人体静态平衡 线性回归 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]