A Magnetically-Actuated Friction Feedback Mouse
نویسندگان
چکیده
We have designed and built a passive haptic display by integrating an electromagnet into an infra-red optical mouse. When the electromagnet is not energized, the mouse acts normally, with the same low friction and only a slight increase in mass. Energizing the electromagnet attracts the mouse towards a ferromagnetic mouse pad, increasing the normal force, and thus the frictional force, between the mouse and the mouse pad. This allows a two-dimensional display of varying frictional forces. Our hypothesis was that an increase in friction over particular targets could enable the user to travel more quickly between those targets. In addition to several demonstrations, we designed a performance experiment to quantitatively determine how user performance is affected by friction feedback during a targeting task. The results of this experiment show a conclusive relationship between the field strength of the magnet and the targeting time.
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