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arXiv 2004.02311cs.RO
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基于指甲成像和视觉伺服的约束与非约束抓取力比较

Comparison of Constrained and Unconstrained Human Grasp Forces Using Fingernail Imaging and Visual Servoing

University of Utah(犹他大学)

Navid Fallahinia, Stephen A. Mascaro

摘要:

指甲成像已被证明是有效的,在先前的工作[1],[2]估计的3D指尖力的最大RMS估计误差为7%。在目前的研究中,指甲成像是用来进行无约束的多个手指的抓力测量,研究人类的抓。此外,还设计了两个装有摄像机的机械臂和一个视觉跟踪系统,以便在实验期间将人的手指保持在摄像机框架内。实验测试已经进行了六个人类受试者在约束和无约束的抓取条件下,结果表明两个抓取条件之间的手指之间的力协作的显着差异。根据实验的另一个有趣的结果是,与受约束的抓握相比,不受约束的抓握力更均匀地分布在手指上,并且每个手指力中的力变化更小(更稳定)。这些结果验证了以不受约束的方式测量抓握力的重要性,以研究人类如何自然地抓握物体。

英文摘要:

Fingernail imaging has been proven to be effective in prior works [1],[2] for estimating the 3D fingertip forces with a maximum RMS estimation error of 7%. In the current research, fingernail imaging is used to perform unconstrained grasp force measurement on multiple fingers to study human grasping. Moreover, two robotic arms with mounted cameras and a visual tracking system have been devised to keep the human fingers in the camera frame during the experiments. Experimental tests have been conducted for six human subjects under both constrained and unconstrained grasping conditions, and the results indicate a significant difference in force collaboration among the fingers between the two grasping conditions. Another interesting result according to the experiments is that in comparison to constrained grasping, unconstrained grasp forces are more evenly distributed over the fingers and there is less force variation (more steadiness) in each finger force. These results validate the importance of measuring grasp forces in an unconstrained manner in order to study how humans naturally grasp objects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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