基于运动捕捉的骑行运动中人体皮肤形变分析

Analysis on skin deformation of human body during cycling based on motion capture

为揭示在骑行运动过程中人体尺寸变化以及皮肤的形变规律,首先运用Opti Track运动捕捉系统采集了骑行运动中人体标记点的位置变化及其运动轨迹,对人体动态变化做定性分析,然后采用体表画线法对骑行运动中人体皮肤形变规律作进一步研究。结果表明:在骑行运动周期过程中,腰部及以上部位的点波动较小,尺寸变化较小,下肢部位点的波动较大,尤其膝部,且垂直方向变化大于水平方向;腿部变化复杂,且在骑行运动中不同区域的变化存在差异,其中围度变化率约在(-8%,16%)区间,长度变化率在(-60%,40%)区间;膝部的变化最为明显,变化率最大值达-60%左右,大腿和小腿处的变化较小。

In order to reveal regularities of the change of human body size and the deformation of the skin during cycling,the paper firstly used the OptiTrack motion capture system to acquire position change of the human body marker point and track of motion in the cycling movement,and analyzed qualitatively the dynamic change of the human body.And then the regularities of leg skin deformation were further studied by lineation-on-body experiment.It is found that the fluctuation of the markers and human body size in the waist and above is slight change,the change fluctuation of the lower is larger than above the waist,especially in the knee,and the change of the vertical direction is greater than that in the horizontal direction.Furthermore,the results show that the change of the leg is complicated and differences in the changes exist on different regions during cycling,the change rate of girth is in the range from-8%to 16%and the length is in the range from-60%to 40%.The change of knee is the most obvious and the maximum change rate is about-60%,and the change of thigh and lower leg is small.