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Acoustic Wave Approach for Multi-Touch Tactile Sensing

Yuan Liu 1, 2 Jean-Pierre Nikolovski 2 Moustapha Hafez 2 Nazih Mechbal 1 Michel Vergé 1 
2 LIS - Laboratoire Interfaces Sensorielles
DIASI - Département Intelligence Ambiante et Systèmes Interactifs : DRT/LIST/DIASI
Abstract : In this communication, we present a high resolution tactile plate that can localize one or two contact fingers. The localization principle is based on Lamb wave absorption. Fingers' contact will generate absorption signals while Lamb waves are propagating in a thin finite copper plate. These signals can be related to the contact positions and can be calibrated before the use of tactile plate. Fingers' contact positions are calculated by finding the closest calibration signal to the measured signal. Positions are carried out in less than 10 ms with a spatial resolution of 2 mm for one finger localization. Multi-points localization by this technology is developed and a two-point case is initialized and tested. Several optimization methods are also presented in this paper, as the double validation check which could improve the accuracy of single-point localization from 94.63% to 99.5%.
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Submitted on : Thursday, September 17, 2009 - 4:35:11 PM
Last modification on : Thursday, February 17, 2022 - 10:08:03 AM
Long-term archiving on: : Saturday, November 26, 2016 - 12:20:48 PM


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  • HAL Id : cea-00418252, version 1
  • ARXIV : 0909.3361




Yuan Liu, Jean-Pierre Nikolovski, Moustapha Hafez, Nazih Mechbal, Michel Vergé. Acoustic Wave Approach for Multi-Touch Tactile Sensing. 2009 International Symposium on Micro-NanoMechatronics and Human Science, Nov 2009, Nagoya, Japan. ⟨cea-00418252⟩



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