在使用惯性测量单位的幼儿中估计步行时间参数:比较15个算法
Francesca d'Andrea1, Ben Heller1, Jonathan Wheat2
1School of Sport and Physical Activity, Sheffield Hallam University, UK.
Gait & posture
|March 5, 2025
概括
惯性测量单元可以分析幼儿步行参数. 脚传感器提供高准确度和精度,而下背传感器为步伐和步伐时间提供良好的准确度,使儿童的步态监测成为可能.
科学领域:
- 生物医学工程 生物医学工程
- 儿科运动发展 儿科运动发展
- 可穿戴技术可穿戴技术
背景情况:
- 评估儿童的运动发育依赖于分析步态时间参数和可变性.
- 惯性测量单位 (IMU) 对于在现实环境中检测步行事件至关重要.
- 现有的步态分析算法已在成年人中得到验证,但它们在幼儿中的性能仍未得到检查.
研究的目的:
- 评估惯性测量单位 (IMU) 的有效性,以分析幼儿的步态时间参数.
- 将各种基于IMU的算法的性能与金标准 (GAITRite mat) 进行比较.
主要方法:
- 使用腰部或脚安装IMU的15个既定的算法被用于检测步行事件和计算时间参数.
- 分析了15名幼儿的数据,包括1388次最初和1388次最后的脚接触.
- 算法性能被评估为准确性 (Bland Altman协议极限) 和精度 (事件识别精度).
主要成果:
- 没有一个算法在所有指标上都被证明是优越的.
- 安装在脚上的IMU算法在利用中侧边角速度时表现出卓越的准确性和完美的精度.
- 使用结果加速的下背IMU算法显示了可比的步进时间精度和更高的步进时间精度,但缺乏完美的精度.
结论:
- 在受控研究环境中,IMU是分析幼儿步行时间参数的可行工具.
- 未来的研究可以利用IMU在自由生活环境中进行步态监测,提高对儿童早期步态发展的理解.
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