基于非侵入式虚拟传感方法的下肢关节运动学检测  

Assessment and analysis of lower limb joint kinematics based on non-intrusive virtual sensing method

作　　者：刘坤[1] 赵建琛 韩宣[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2015年第1期145-152,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(81101138);中国博士后科学基金项目(2011M500601);长春市社会发展科技计划项目(2012111-12SF39)

摘　　要：提出了一种基于非侵入式虚拟传感检测方式分析下肢关节运动学的方法。利用可穿戴式传感系统的检测信号,采用双物理传感器差分算法与双虚拟传感器差分算法相结合的方式,计算下肢关节处虚拟植入的传感器运动状态,在膝关节解剖学坐标系内,实现对膝关节的运动学分析。为了初步验证本方法的正确性与可用性,采用三轴加速度计和地磁力计等开发了一套可穿戴式传感系统,并通过五位受验者进行了实验验证。实验结果表明:本文方法可实现应用穿戴式传感系统进行非侵入式下肢关节运动学检测与分析,进一步改进和提高其测量精度后,可应用于步态分析。In this paper, a novel approach for analysis of the kinematics of lower limb joint based on non-intrusive virtual sensors is presented. With the signals obtained from a wearable sensor system, the method, which combines a physical-sensor-difference-based algorithm and virtual-sensor-difference-based algorithm, is used to calculate the rotational angles of the virtual sensors supposed to be fixed on the knee joint. Then the data is used to analyze the knee joint kinematics in anatomical coordinate system. To test the approach, a wearable sensor system composed of aceelerometers and magnetometers is developed and evaluated on the lower limbs of five subjects. The results show that, without intrusive sensors, the proposed approach is suitable for detecting and analyzing the parameters of the kinematics of lower limb joint with wearable sensor system. After the measuring accuracy is improved, the approach can be applied for gait analysis.

关 键 词：仪器仪表技术 双传感器差分算法 非侵入式虚拟传感器 关节运动学分析 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]