Polarity Effect in Electrovibration for Tactile Display
| Autor: | K. Nammi, David J. Beebe, Steven J. Haase, Kurt A. Kaczmarek, Mitchell E. Tyler, Abhishek K. Agarwal |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Materials science Polarity (physics) Acoustics Transducers Biomedical Engineering Tactile sensation Sensory system Vibration Article Tactile display Fingers User-Computer Interface Skin Physiological Phenomena Sensory threshold Humans Electrovibration Computer vision Skin business.industry Equipment Design Electric Stimulation Equipment Failure Analysis Touch Sensory Thresholds Artificial intelligence business Transduction (physiology) |
| Zdroj: | IEEE Transactions on Biomedical Engineering. 53:2047-2054 |
| ISSN: | 1558-2531 0018-9294 |
| Popis: | Electrovibration is the tactile sensation of an alternating potential between the human body and a smooth conducing surface when the skin slides over the surface and where the current is too small to stimulate sensory nerves directly. It has been proposed as a high-density tactile display method, for example to display pictographic information to persons who are blind. Previous models for the electrovibration transduction mechanism are based on a parallel-plate capacitor in which the electrostatic force is insensitive to polarity. We present experimental data showing that electrovibratory perceptual sensitivity to positive pulses is less than that for negative or biphasic pulses and propose that this disparity may be due to the asymmetric electrical properties of human skin. We furthermore propose using negative pulses for insulated tactile displays based on electrovibration because their sensory thresholds were found to be more stable than for waveforms incorporating positive pulses. |
| Databáze: | OpenAIRE |
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