Tactile Displays . Presented By Mary Wesler Rakesh Dave. Definitions. Tactile: A sensation perceived by the sense of touch; pressure or traction exerted on the skin is perceived; sensitivity to vibration or movement to stimulation of nerves.
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(Courtesy Unitech Research)
. The Linear Grasper is now capable of simulating fundamental mechanical properties of objects such as compliance, viscosity and mass during haptic interactions. Virtual wall and corner software algorithms were developed for the Planar Grasper, in addition to the simulation of two springs within its workspace.
(Courtesy C M Research Group)
Response measures of these determine the amount and type of information that can be presented and classification of these have functional roles
( Particularly notable fact is that threshold for women is less than that for men!!!!!!!!!!!!)
Types Chapter 9, Fig. 9-9
Advantages to Subdermal and Wire
Sensations - tingle, itch, vibration, buzz, touch, pressure, pinch, and sharp or burning pain
Dynamic range = threshold pain (IP)/threshold sensation (IS)
Dynamic RangeProposed = Perceived Magnitude at Maximal Current (IM) without discomfort.
Note: IP = 1.3 IM
Justification: IP/IS is an electrical measure not a perception measure. Maximizing IP/IS does not guarantee a usefully strong or comfortable sensation.
Chapter 9, Fig. 9-15.
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Sharedd Virtual Environments: with haptic and visual feedback. www.rcs.ee.washington.edu/BRL/project/shared/
Bach-y-Rita, P. , Kaczmarek, KA, Tyler, ME., Garcia-Lara, J., DDS Form perception with a 49-point electrotactile stimulus array on the tongue. Center for Neuroscience and the Department of Rehabilitation Medicine, Trace R&D Center, University of Wisconsin, Madison, WI