在L5-S1估计压力和剪切力:利用光学和惯性运动捕捉系统探索负载重量,不对称性和高度的影响
Iván Nail-Ulloa1,2, Michael Zabala3, Richard Sesek1
1Department of Industrial and Systems Engineering, Auburn University, Auburn, AL 36849, USA.
Sensors (Basel, Switzerland)
|March 28, 2024
概括
与光学运动捕获 (OMC) 相比,惯性运动捕获 (IMC) 在提升任务中低估了L5-S1关节力. 为了准确的人体工程学评估,需要改进传感器放置和人体模型.
科学领域:
- 生物力学 生物力学
- 人体工程学就是人体工程学.
- 运动捕捉技术的技术.
背景情况:
- 在手动操作时准确估计脊柱负荷对于预防肌肉骨损伤至关重要.
- 惯性运动捕获 (IMC) 为生物机械分析提供了光学运动捕获 (OMC) 的便携式替代方案.
- 评估IMC在职业环境中评估联合力量的有效性至关重要.
研究的目的:
- 在手动提升过程中使用IMC与OMC对比L5-S1关节的压力和切削力估计.
- 为了确定IMC和OMC系统之间动力学测量的差异.
- 确定影响基于IMC的肌肉骨模型中力量估计精度的因素.
主要方法:
- 36名参与者在不同的负载和高度下进行了手动提升和降低任务.
- 使用全身IMC系统和光学运动捕捉 (OMC) 系统同时收集数据.
- 分析L5-S1关节的压力和切削力,关节角度和段距离.
主要成果:
- 与OMC相比,IMC始终低估了L5-S1压力 (34%) 和剪切力 (30%) 的压力.
- 显著低估了车身曲角度 (高达28度) 和段长的IMC系统.
- 负载重量是影响力估计的最重要因素,特别是在较低的起重高度.
结论:
- IMC系统显示了人体工程学评估的潜力,但需要在传感器放置和人类计量建模方面进行改进,以获得可靠的力和动力学估计.
- 关节角度和段距离的差异凸显了当前IMC模型的局限性.
- 需要进一步的研究来优化IMC以进行准确的职业生物力学分析.
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