OpenCap与Force平台的同步:验证基于事件的算法
María Isabel Pavas Vivas1, Diego Alejandro Arturo2, Stefania Peñuela Arango1
1Program in Biomedical Sciences, School of Basic Sciences, Faculty of Health, Universidad del Valle, Cali 760032, Colombia.
Sensors (Basel, Switzerland)
|January 28, 2026
概括
一个新的算法将无标记运动捕捉 (OpenCap) 与使用脚跟动力事件的力量平台同步起来. 这种方法可以在没有硬件触发器的低成本环境中进行准确的生物力学分析.
科学领域:
- 生物力学 生物力学
- 运动捕捉技术的技术.
- 人类运动分析 人类运动分析
背景情况:
- 像OpenCap这样的无标记运动捕捉系统提供了低成本的生物机械分析.
- 将OpenCap与力量平台集成需要精确的时间同步,而无需硬件触发.
研究的目的:
- 开发一个自动同步算法,使OpenCap动力学与力平台动力学对齐.
- 为了验证算法的准确性,在下肢功能练习中使用脚跟动力学事件来验证算法的准确性.
主要方法:
- 开发了一种算法,可以从OpenCap垂直动力学中检测脚跟接触.
- 调整检测到的脚跟接触与从力平台的垂直地面反应力初始上升.
- 使用相关性,RMSE和MAE对垂直地面反应力的黄金标准系统验证了算法.
主要成果:
- 该算法成功地同步了92.5%的330个运动记录.
- 验证显示了高相关性 (r=0.85在60°,r=0.81在90°) 与低误差指标 (RMSE <0.17,MAE <0.14).
- 同步准确度与硬件触发系统相提并论.
结论:
- 一个基于脚跟接触的算法提供了OpenCap和力量平台之间的准确同步.
- 这种方法提高了资源有限的临床,体育和职业环境中的生物力学分析能力.
- 使用无标记运动捕捉实现高级动态分析.
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