Gait posture estimation using wearable acceleration and gyro sensors
Gait posture estimation using wearable acceleration and gyro sensors
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DOI：
10.1016/j.jbiomech.2009.07.016
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发表时间：
2009-11-13
影响因子：
2.4
通讯作者：
Yoshinari, Satoshi
中科院分区：
文献类型：
--
作者：
Takeda, Ryo;Tadano, Shigeru;Yoshinari, Satoshi
提出了一种基于可穿戴加速度传感器和陀螺仪传感器的步态分析方法。志愿者佩戴的传感器单元包括一个三轴加速度传感器和三个单轴陀螺仪传感器。在步态分析中，利用陀螺传感器测量的角速度数据估计平移加速度。然后从加速度传感器测量值中减去平移加速度，以获得重力加速度，从而给出下肢节段的方向。身体测量的片段方向沿着用于获得髋关节、膝关节和踝关节的位置，以创建志愿者的简笔画模型。该方法可以测量运动过程中髋、膝、踝关节中心的三维位置。对三名健康志愿者的正常步态进行了实验。结果，计算髋关节的屈曲-伸展（F-E）和内收-外展（A-A）关节角以及膝关节的屈曲-伸展（F-E）关节角，并与摄像机运动捕捉系统进行比较。髋关节F-E的相关系数大于0.88，髋关节A-A的相关系数大于0.72，膝关节F-E的相关系数大于0.92。创建每个志愿者的移动简笔画模型以视觉确认行走姿势。此外，膝关节和踝关节在水平面上的轨迹表明，左腿和右腿是双侧对称的。(C)2009爱思唯尔有限公司保留所有权利。
A method for gait analysis using wearable acceleration sensors and gyro sensors is proposed in this work. The volunteers wore sensor units that included a tri-axis acceleration sensor and three single axis gyro sensors. The angular velocity data measured by the gyro sensors were used to estimate the translational acceleration in the gait analysis. The translational acceleration was then subtracted from the acceleration sensor measurements to obtain the gravitational acceleration, giving the orientation of the lower limb segments. Segment orientation along with body measurements were used to obtain the positions of hip, knee, and ankle joints to create stick figure models of the volunteers. This method can measure the three-dimensional positions of joint centers of the hip, knee, and ankle during movement. Experiments were carried out on the normal gait of three healthy volunteers. As a result, the flexion-extension (F-E) and the adduction-abduction (A-A) joint angles of the hips and the flexion-extension (F-E) joint angles of the knees were calculated and compared with a camera motion capture system. The correlation coefficients were above 0.88 for the hip F-E, higher than 0.72 for the hip A-A, better than 0.92 for the knee F-E. A moving stick figure model of each volunteer was created to visually confirm the walking posture. Further, the knee and ankle joint trajectories in the horizontal plane showed that the left and right legs were bilaterally symmetric. (C) 2009 Elsevier Ltd. All rights reserved.