Analysis of upper extremity motion during trip-induced falls
Analysis of upper extremity motion during trip-induced falls
复制标题
跌倒时上肢运动分析
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Okamoto
中科院分区：
文献类型：
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作者：
Saeed Abdolshah;Yasuhiro Akiyama;Kento Mitsuoka;Yoji Yamada;S. Okamoto
前倒是上肢骨折最常见的原因之一。影响冲击力和伤害的重要因素进行了广泛的研究，但是，有必要调查的自然反应的人在向前跌倒，以获得一个现实的伤害评估。本研究的目的是分析在诱导跳闸时上肢的自然运动。我们进行了绊倒实验，使用一个障碍物碰撞一条腿，而恢复步骤被阻止产生一个向前跌倒。结果表明，前倒过程中手肘伸展度呈小幅上升趋势，触地瞬间肘关节角度的大小有利于降低最大力量。落在障碍物一侧的手更有可能是由于身体向障碍物一侧旋转。为了防止受伤，受试者被连接到安全带上，以免以高冲击速度撞击地面。因此，使用12自由度模型模拟跌倒运动，以获得撞击速度的真实评估，并使用矢状3段模型估计由向前跌倒引起的相关撞击力。这项研究的结果可能是有用的人与机器人之间的碰撞可能会导致向前跌倒的人与机器人的协作。
Forward fall is one of the most common causes of upper extremity fractures. Significant factors influencing impact force and injuries were widely studied; however, it is necessary to investigate the natural reactions of humans during a forward fall to obtain a realistic evaluation of injuries. The purpose of this study was to analyze the natural motion of the upper extremity during an induced trip. We carried out a tripping experiment using an obstacle colliding with one leg; while recovery step was prevented to produce a forward fall. Results showed that the elbow extension had a slight ascending trend during the forward fall and elbow angle at the moment of hand-ground contact was appropriate to reduce the peak force. Landing on the obstacle-side hand was more likely due to body rotation towards the obstacle-side. To prevent injuries, subjects were connected to a safety harness not to strike the ground with high impact velocity. Thus, the fall motion was simulated using a 12 DOF model to obtain a realistic evaluation of the impact velocity and the related impact force caused by the forward fall was estimated using a sagittal 3-segment model. Results of this study can be useful in human-robot collaboration, where a collision between human and robot may cause a forward fall.