人行走过程中膝关节角度特征研究

Characteristic Angle of Human Knee Joint in Walking

目的通过对人行走时膝关节角度的记录和分析,研究其稳定性、左右对称性和不同人之间的差异性,为步态识别提供科学依据。方法运用Vicon运动捕捉系统,采集20位研究对象以步长为最舒适以及50、60、70、80、90cm行走时膝关节角度相关数据,并进行分析。结果通过对数据的观察、分析发现,以相同步长行走时同一人膝关节角度特征稳定;一些个体左、右膝关节角度存在对称性,但不具有普遍性;不同人之间差异明显。结论本研究证明同一人行走时膝关节角度特征具有稳定性,不同人之间存在差异性,为认定和排除特定人提供理论支撑,为步态识别提供依据,也为研究人的行走运动特征提供新的方法和思路。

Objective To explore the stability, symmetry and inter-person differences through analysis into human knee joints’ angles recorded during walking in order to provide scienti c foundation for gait recognition. Methods Used of the Vicon, a motion capture system, 20 subjects were collected of their real-time data of knee joints’ angles from walking at a stride (cm) of most comfortable length, 50, 60, 70, 80 and 90, leaving the data to be analyzed. Results The data show that the knee joint’s angle keeps stable if one person maintains walking at the same striding length. Though some people behave symmetric angles of their both knee joints, yet unable to bring forward a universal conclusion. Additionally, there is obvious diversity from the angles among people. Conclusions The observation that same person has stable and even symmetric knee joints’ angle and different subjects have diversity of the angles contributes to the studies on human walking characteristics, providing a scienti c basis for certain person to identify or exclude with the gait recognition.