同时有效性Theia3D无标记运动捕捉用于检测步行速度之间的斜视动力学差异
Josh Walker1, Aaron Thomas1, David E Lunn1,2
1Carnegie School of Sport, Leeds Beckett University, Leeds, UK.
Journal of sports sciences
|June 3, 2025
概括
无标记运动捕捉 (MMC) 准确地测量了不同步行和跑步速度的下肢斜腰平面动力学. 然而,与基于标记器的系统相比,它对盆腔倾斜测量的准确性较低.
科学领域:
- 生物力学 生物力学
- 运动分析 运动分析
- 步态分析 步态分析
背景情况:
- 无标记运动捕捉 (MMC) 为步态分析提供了一种可能更容易获得的方法.
- 对于检测多个步行速度的动力学差异,MMC的同时有效性仍然不清楚.
研究的目的:
- 确定Theia3D MMC能够检测出对不同步行速度 (走路和跑步) 的斜面平面运动反应的能力.
- 为了比较Theia3D MMC的准确性与基于标记器的运动捕捉用于下肢和骨盆运动.
主要方法:
- 14名参与者在跑步机上以每小时3,5,10和12公里的速度行走和跑步.
- 使用基于标记器的光电子摄像头和Theia3D MMC通过视频同步收集数据.
- 在系统之间对骨盆,部,膝盖和脚的斜腰平面运动学进行比较.
主要成果:
- Theia3D在部,膝盖和脚运动方面表现出极好的波形相似性 (CMD ≥0.87).
- 对联合动力学 (最小,最大,ROM) 的共识大多是好到优秀 (ICC = 0.475-0.950).
- 盆腔倾斜显示下部波形相似性 (CMD ≤ 0.48) 和一致性 (ICC = 0.032-0.776).
结论:
- Theia3D MMC适用于评估不同步行速度的下肢斜腰平面关节动力学.
- 与基于标记器的系统相比,该系统对骨盆倾斜测量的准确性有限.
相关概念视频
01:10Relative Motion Analysis - Acceleration
437
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
437
01:24Relative Motion Analysis - Velocity
445
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
445
01:25Relative Motion Analysis using Rotating Axes
549
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
549