期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 162, 期 2, 页码 394-399出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2010.03.020
关键词
Lamb wave; Tactile; Multi-touch; Diffraction; Pattern recognition
This paper proposes an acoustic multi-touch tactile sensing method. The proposed method is based on an amplitude disturbed ultrasonic wave diffraction pattern. An A(0) 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. (C) 2010 Elsevier DV. All rights reserved.
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