Hsieh Tsung-Han, Tsai An-Chih, Chang Cha-Wei, Ho Ka-Hou, Hsu Wei-Li, Lin Ta-Te
Department of Bio-Industrial Mechatronics Engineering, National Taiwan University, Taipei 106, Taiwan.
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:6772-5. doi: 10.1109/EMBC.2012.6347549.
In this paper, both hardware and software design to develop a wearable walking monitoring system for gait analysis are presented. For hardware, the mechanism proposed is adaptive to different individuals to wear, and the portability of the design makes it easy to perform outdoor experiments. Four force sensors and two angle displacement sensors were used to measure plantar force distribution and the angles of hip and knee joints. For software design, a novel algorithm was developed to detect different gait phases and the four gait periods during the stance phase. Furthermore, the center of ground contact force was calculated based on the relationships of the force sensors. The results were compared with the VICON motion capture system and a force plate for validation. Experiments showed the behavior of the joint angles are similar to VICON system, and the average error in foot strike time is less than 90 ms.
本文介绍了用于步态分析的可穿戴式步行监测系统的硬件和软件设计。在硬件方面，所提出的机构适合不同个体佩戴，设计的便携性使其便于进行户外实验。使用四个力传感器和两个角位移传感器来测量足底力分布以及髋关节和膝关节的角度。在软件设计方面，开发了一种新颖的算法来检测不同的步态阶段以及站立阶段的四个步态周期。此外，基于力传感器之间的关系计算地面接触力的中心。将结果与VICON运动捕捉系统和测力台进行比较以进行验证。实验表明关节角度的表现与VICON系统相似，并且足跟着地时间的平均误差小于90毫秒。
