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Development of tangible human-machine interface exploiting in-solid vibrational signals acquired by multiple sensors

Marco Fabiani, Politecnico di Milano, Facoltā di Ingegneria, Corso di laurea in Ingegneria delle Telecomunicazioni

Opponent: Andreas Wagner

Abstract

We all use tangible controls (that means controlled by our hands) in every day interaction with electronic devices. Typical examples are keyboards, mouses, touch pads and touch screens. Such interaction devices share the disadvantage of being equipped with mechanical or electronic devices exactly at the point of interaction with the interface (switches, potentiometers, sensitive layers, force- resistive sensors, etc). This tends to increase the manufacturing costs, limit the interaction to predetermined regions of the contact surface, and make them less sturdy and less suitable for outdoor/industrial operation.
The aim of this project work is to find a novel method for the development of tangible interfaces that reduces the need of intrusive sensors/devices. To do this, we directly acquire and study the vibrations produced by the interaction of the user and that propagate inside the material.
The techniques that are commonly used don\'t take into account any apriori knowledge about the vibrations, and for this reason they are usually not precise and they are not able to track a continuous interaction.
By taking into account the dispersive properties of the vibrations propagating inside solids (and actually measuring the dispersion curves), we developed a robust method that exploits the dispersion of the vibrations in order to localize an impulsive interaction (finger tap) and to track a continuous one (finger scratch) on a thin plate of an almost isotropic material. We then used this method to develop a tangible interface by applying four accelerometers on a MDF plate. This work was developed in the framework of the Tai-Chi European project, http://www.taichi.cf.ac.uk

10:00 - 11:00
Tuesday February 7, 2006

The seminar is held in Fantum.

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Last updated: Wednesday, 23-Jun-2010 09:22:46 MEST