实现基于IMU的方便和准确的步态分析
Mohamed Boutaayamou1,2, Doriane Pelzer3, Cédric Schwartz1
1Laboratory of Movement Analysis, University of Liège, B-4000 Liège, Belgium.
Sensors (Basel, Switzerland)
|February 26, 2025
概括
惯性测量单元 (IMU) 系统可靠地测量健康成年人的步行参数,跨越各种行走条件. 这项技术适用于医疗应用,如跌倒风险评估和假肢评估.
科学领域:
- 生物力学 生物力学
- 步态分析 步态分析
- 可穿戴技术可穿戴技术
背景情况:
- 基于惯性测量单位 (IMU) 的系统在量化步态参数方面表现有前途.
- 在不同的行走条件和临床环境中,可靠性和准确性需要进一步研究.
研究的目的:
- 评估基于IMU的新型步态分析系统的会内可靠性和准确性.
- 建立40-65岁健康成年人的步态参数参考数据库.
- 探索性别特异性差异,并确定性别独立的步态参数.
主要方法:
- 使用了先前开发的IMU系统,采用脚跟安装模块.
- 招募了55名男性和46名女性 (40-65岁) 来进行数据收集.
- 在正常,双重任务和快速行走条件下评估步态参数.
- 评估的会话内可靠性使用ICC(2,1),SEM%和MDC%.
主要成果:
- 对于时空参数和脚步长度对称性,可靠性很好 (ICC ≥ 0.90).
- 快速行走性能指数和步行速度的可靠性 (ICC ≥ 0.91) 很好或很好.
- 确定了独立于性别的参数,包括姿势/双重支时间和正常化的步行速度.
- 观察到摇摆时间和步伐长度的性别差异,特定的对称比率和快速行走性能指标是独立于性别的.
结论:
- 基于IMU的系统表现出极好的会议内可靠性和步态分析的准确性.
- 建立了参考值和确定了独立于性别的关键步行参数.
- 该系统的可靠性和优势支持其在医疗应用中使用,如假肢评估,跌倒风险评估和康复.
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