Predicting Fingertip Forces by Imaging Coloration Changes in the Fingernail and Surrounding Skin
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چکیده
منابع مشابه
Fingertip Force Measurement by Imaging the Fingernail
Shear and normal forces from fingertip contact with a surface are measured by external camera images of the fingernail. Due to mechanical interaction between the surface, fingertip bone, and fingernail, regions of tension or compression are set up that result in reddening or whitening due to blood flow. The effect is quantitative enough to serve as a transducer of fingertip force. Due to indivi...
متن کاملThe Common Patterns of Blood Perfusion in the Fingernail Bed Subject to Fingertip Touch Force and Finger Posture
When the human fingertip is pressed against a surface or bent, the hemodynamic state of the fingertip is altered in a way that is common to all people. Normal force, shear force, and finger extension/flexion all result in visibly distinct patterns of blood volume or perfusion beneath the fingernail. These patterns of blood perfusion can be used not only to monitor the state of the finger, but a...
متن کاملUnderstanding of Fingernail-Bone Interaction and Fingertip Hemodynamics for Fingernail Sensor Design
When the human fingertip is pressed against a surface or bent, the hemodynamic state of the fingertip is altered due to mechanical interactions between the fingernail and bone. Normal force, shear force, and finger extension/flexion all result in different patterns of blood volume beneath the fingernail. This phenomenon has been exploited in order to detect finger forces and finger posture by c...
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15 صفحه اولControl of fingertip forces in multidigit manipulation.
Previous studies of control of fingertip forces in skilled manipulation have focused on tasks involving two digits, typically the thumb and index finger. Here we examine control of fingertip actions in a multidigit task in which subjects lifted an object using unimanual and bimanual grasps engaging the tips of the thumb and two fingers. The grasps resembled those used when lifting a cylindrical...
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ژورنال
عنوان ژورنال: IEEE Transactions on Biomedical Engineering
سال: 2008
ISSN: 0018-9294,1558-2531
DOI: 10.1109/tbme.2008.925691