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Extensions to haptic augmented reality: Modulating friction and weight

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4 Author(s)
Seokhee Jeon ; Comput. Vision Lab., ETH Zurich, Zurich, Switzerland ; Metzger, J.-C. ; Seungmoon Choi ; Harders, M.

Haptic augmented reality merges real and virtual feedback, allowing a user to touch the real environment augmented with virtual haptic stimuli. A key functionality of this technology is altering the haptic properties of real objects by means of virtual haptic feedback. Previously, we have developed a haptic augmentation system in which object stiffness was modulated. In this paper, we extend our framework to cover further haptic properties: friction and weight. Simple but effective algorithms for estimating and altering these properties have been developed. The first approach allows us to change the inherent friction between a tool tip and a surface to a desired one identified in an offline process. The second technique enables a user to perceive an altered weight when lifting an object at two interaction points. The performance of the proposed algorithms has been evaluated on real objects. The errors remain within reasonable bounds and compare well to the relevant perceptual Weber fractions. Limitations of our technique are identified, and possible extensions are proposed.

Published in:

World Haptics Conference (WHC), 2011 IEEE

Date of Conference:

21-24 June 2011