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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
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.
Electrotactile display, impedance feedback, pulse width modulation, real-time feedback, two point discrimination.

H. Kajimoto, "Electrotactile Display with Real-Time Impedance Feedback Using Pulse Width Modulation," in IEEE Transactions on Haptics, vol. 5, no. , pp. 184-188, 2011.
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