使用惯性测量单元在静止时估计全身质量中心的摇摆
Liam H Foulger1, Emma R Reiter1, Calvin Kuo2,3
1School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada.
PloS one
|January 13, 2025
概括
四个惯性测量单位 (IMU) 足以准确估计静止时的质量中心 (CoM) 位移. 这一发现使得对各种临床条件进行现实世界的平衡评估成为可能.
科学领域:
- 生物力学 生物力学
- 人类运动科学科学 人类运动科学
- 可穿戴技术可穿戴技术
背景情况:
- 保持直立平衡对于日常活动至关重要,而赤字会显著影响生活质量.
- 在现实环境中评估站立平衡是重要的,但具有挑战性.
- 惯性测量单元 (IMU) 为远程平衡评估提供了一个低成本的解决方案.
研究的目的:
- 为了确定在静止状态下准确估计质量中心 (CoM) 位移所需的IMU的最小数量.
- 评估基于IMU的CM移位估计在不同立场宽度的准确性.
主要方法:
- 16名参与者在一个力量平台上静静地站立,以狭窄,部宽和肩膀宽的姿势执行任务.
- 多个IMU被戴在头部,胸骨,背部,大腿和腿部.
- 一个多段生物机械模型使用各种IMU组合估计了CoM位移,与力量平台数据进行了比较.
主要成果:
- 为了准确估计前后 (AP) 和中侧 (ML) CoM 位移,发现需要四个 IMU.
- 在背部,右大腿和两条腿上使用IMU产生了强烈的相关性 (r > 0.86) 与所有姿势的力量平台CoM估计.
- 根平均平方误差 (RMSE) 值始终很低,表明CoM摇摆估计的高准确性.
结论:
- 惯性测量单元可以可靠地估计在静静地站立时全身的CoM位移.
- 为了准确的平衡评估,至少需要四个战略位置的IMU.
- 这种方法提高了平衡研究的生态有效性,并促进了患者的监测.
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