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首页> 外文期刊>Journal of Biomechanics >Stiffness map of the grasping contact areas of the human hand
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Stiffness map of the grasping contact areas of the human hand

机译：人手抓握接触区域的刚度图

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摘要

The elasticity and damping of the soft tissues of the hand contribute to dexterity while grasping and also help to stabilise the objects in manipulation tasks. Although some previous works have studied the force-displacement response of the fingertips, the responses in all other regions of the hand that usually participate in grasping have not been analysed to date. In this work we performed experimental measurements in 20 subjects to obtain a stiffness map of the different grasping contact areas of the human hand. A force-displacement apparatus was used to simultaneously measure force and displacement at 39 different points on the hand at six levels of force ranging from 1. N to 6. N. A non-linear force-displacement response was found for all points, with stiffness increasing with the amount of force applied. Mean stiffness for the different points and force levels was within the range from 0.2. N/mm to 7.7. N/mm. However, the stiffness range and variation with level of force were found to be different from point to point. A total of 13 regions with similar stiffness behaviours were identified. The stiffness in the fingertips increased linearly with the amount of force applied, while in the palm it remained more constant for the range of forces considered. It is hypothesised that the differences in the stiffness behaviour from one region to another allow these regions to play different roles during grasping.
机译：手的软组织的弹性和阻尼有助于抓握时的敏捷性，还有助于在操作任务中稳定物体。尽管以前的一些研究已经研究了指尖的力-位移响应，但是迄今为止，尚未分析通常参与抓握的手的所有其他区域中的响应。在这项工作中，我们对20位受试者进行了实验测量，以获得人手不同抓握接触区域的刚度图。力位移设备用于同时测量从1. N到6. N的六种水平的力在手的39个不同点上的力和位移。发现了所有点的非线性力位移响应。刚度随所施加的力而增加。不同点和力水平的平均刚度在0.2的范围内。 N / mm至7.7。 N /毫米但是，发现点的刚度范围和随力的变化是不同的。总共确定了13个具有相似刚度行为的区域。指尖的刚度随施加的力的大小线性增加，而手掌中的刚度在所考虑的力范围内保持更恒定。假设从一个区域到另一区域的刚度行为的差异使这些区域在抓握过程中发挥不同的作用。

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