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Issue No. 02 - Second (2012 vol. 5)
ISSN: 1939-1412
pp: 184-188
Hiroyuki Kajimoto , The University of Electro-Communications, Tokyo
ABSTRACT
An electrotactile display is a tactile interface composed of skin surface electrodes. The use of such a device is limited by the variability of the elicited sensation. One possible solution to this problem is to monitor skin electrical impedance. Previous studies revealed a correlation between impedance and threshold, but did not construct real-time feedback loops. In this study, an electrotactile display was constructed using a 1.45 \mu{\rm s} feedback loop. Real-time pulse width modulation was proposed, and the relationship between skin resistance and absolute threshold was measured to find a function for determining a suitable pulse width from skin resistance. An evaluation experiment revealed that the proposed algorithm suppressed spatial variation and reduced temporal change.
INDEX TERMS
Electrotactile display, impedance feedback, pulse width modulation, real-time feedback, two point discrimination.
CITATION
Hiroyuki Kajimoto, "Electrotactile Display with Real-Time Impedance Feedback Using Pulse Width Modulation", IEEE Transactions on Haptics, vol. 5, no. , pp. 184-188, Second 2012, doi:10.1109/TOH.2011.39
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