An acoustic multi-touch sensing method using amplitude disturbed ultrasonic wave diffraction patterns

Article dans une revue avec comité de lecture
Auteur
LIU, Yuan
NIKOLOVSKI, Jean-Pierre
40197 Laboratoire Interfaces Sensorielles [LIS]
HAFEZ, Moustapha
40197 Laboratoire Interfaces Sensorielles [LIS]
VERGÉ, Michel
ccMECHBAL, Nazih
59131 Laboratoire de Mécanique des Systèmes et des Procédés [LMSP]

URI
http://hdl.handle.net/10985/9217
DOI
10.1016/j.sna.2010.03.020
Date
2010
Journal
Sensors and Actuators A: Physical

Résumé

This paper proposes an acoustic multi-touch tactile sensing method. The proposed method is based on an amplitude disturbed ultrasonic wave diffraction pattern. An A0 Lamb wave transmitted in a thin finite copper plate is processed to provide tactile information, for one or two fingers. A touch event is localized by identifying the diffraction signals among a database of diffracted Lamb wave references. Statistic models are used to improve the localization reliability. An artificial silicone finger is used in the calibration procedure. This touch interface is evaluated as a 2-touch interface.

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