估计角度信息的可靠性和有效性是使用惯性测量单元基于运动传感器评估的
Taiki Morikawa1,2, Nariyuki Mura2, Toshiaki Sato2
1Department of Rehabilitation, Eniwa Hospital, Eniwa-shi, Japan.
Bio-medical materials and engineering
|July 20, 2024
概括
基于惯性测量单元 (IMU) 的传感器在康复中测量角度具有很高的可靠性和有效性. 这些负担得起的IMU传感器可以在临床环境中有效地用于运动分析.
科学领域:
- 生物力学 生物力学
- 康复工程 康复工程
- 可穿戴技术可穿戴技术
背景情况:
- 基于惯性测量单元 (IMU) 的运动传感器为康复应用提供了负担得起的解决方案.
- 然而,人们对IMU对角度估计的准确性存在担忧,特别是对速度依赖的错误的易感性.
研究的目的:
- 这项研究旨在严格评估从基于IMU的传感器获得的角度数据的可靠性和有效性.
- 调查特别比较了IMU衍生角度与黄金标准的三维 (3D) 运动分析系统.
主要方法:
- 来自IMU传感器的角度测量 (IMU角度) 与从3D运动分析仪获得的欧勒角度进行比较.
- 使用布兰德-阿尔特曼分析,类内相关系数 (ICC) (1,1) 和交叉相关函数来评估可靠性.
- 通过比较RMS误差,ICC (2,1),以及欧勒和IMU角度之间的交叉相关函数来评估有效性.
主要成果:
- 布兰德-阿尔特曼分析显示,IMU角度测量没有显著的固定或比例偏差,误差在0.2°至3.2°之间.
- 有效性评估显示了0.3°至2.2°之间的低平方根平均值 (RMS) 误差.
- 高达成的协议是指ICC (2,1) 值为0.9和交叉相关函数超过0.9.
结论:
- 基于IMU的传感器在捕获角度数据方面具有很高的可靠性和有效性.
- 这些发现支持IMU角度在康复环境中的潜在使用,因为它们的准确性和一致性.
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