INVESTIGATION OF VHI AFFECTED BY THE DENSITY OF MECHANORECEPTIVE UNITS FOR VIRTUAL SENSATION

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering, Engineering, Electrical & Electronic

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VOLUME 6 , ISSUE 4 (September 2013) > List of articles

INVESTIGATION OF VHI AFFECTED BY THE DENSITY OF MECHANORECEPTIVE UNITS FOR VIRTUAL SENSATION

N. Rajaei * / M. Ohka * / T. Miyaoka / Hanafiah Yussof / Ahmad Khushairy Makhtar / Siti Nora Basir

Keywords : Tactile displays and sensors, Virtual sensation, Velvet hand illusion, Psychophysical experiment, Mechanoreceptive afferent units.

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 6, Issue 4, Pages 1,516-1,532, DOI: https://doi.org/10.21307/ijssis-2017-602

License : (CC BY-NC-ND 4.0)

Received Date : 16-May-2013 / Accepted: 31-July-2013 / Published Online: 05-September-2013

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ABSTRACT

The velvet hand illusion (VHI) is an innovative tactile illusion that enables a human to perceive a velvety sensation by gently rubbing the hands on both sides of wire mesh string through a frame. In order to enhance tactile displays presentation ability, VHI’s mechanism is applied through a series of psychophysical experiments. In this paper, we have investigated the effects of several physical parameters on intensity variation of VHI in subjects’ fingers and fingertips, such as wire distance D and a dimensionless ratio of wire stroke r to wire distance r/D in passive touch based on psychophysical experiment. We obtain D = 45 mm and r/D ≈ 1 as optimum values for VHI intensity for wire distance and the ratio, respectively. Furthermore, as the result of comparison between the present result and the previous result for palm, we conclude that a combination of mechanoreceptive afferent units, SAI, SAII and FAI, are involved in VHI. VHI mechanism is induced when movement of wires is accepted through FAI under constant compressive stimulus for SAI and no shearing force for SAII. This result indicates that VHI can be generated by normal pin matrix type tactile displays because no stimulation of SAII is required.

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