Issue No.03 - July-September (2010 vol.3)
J. Edward Colgate , Northwestern University, Evanston
Erik C. Chubb , Northwestern University, Evanston
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TOH.2010.7
We discuss the design and performance of a new haptic surface capable of controlling shear force on a bare finger. At the heart of the ShiverPaD is the TPaD variable friction device. It modulates the friction of a glass surface by using 39 kHz out-of-plane vibrations to reduce friction. To generate shear forces, the TPaD is oscillated in-plane (i.e., “shivered”) while alternating between low and high friction within each cycle. In previous research, the ShiverPaD produced shear forces using in-plane vibrations below 100 Hz. In this research, we develop a new ShiverPaD that produces force using 854 Hz vibrations, where human sensitivity to vibration is diminished. The new device is used to display a virtual toggle switch and a variety of virtual edges. A human subject study is conducted to demonstrate that users can easily trace virtual edges displayed on the surface of the ShiverPaD.
Haptics, tactile interface, variable friction.
J. Edward Colgate, Erik C. Chubb, "ShiverPaD: A Glass Haptic Surface That Produces Shear Force on a Bare Finger", IEEE Transactions on Haptics, vol.3, no. 3, pp. 189-198, July-September 2010, doi:10.1109/TOH.2010.7