Tactile objects based on an amplitude disturbed diffraction pattern method
TypeArticles dans des revues avec comité de lecture
Tactile sensing is becoming widely used in human-computer interfaces. Recent advances in acoustic approaches demonstrated the possibilities to transform ordinary solid objects into interactive interfaces. This letter proposes a static finger contact localization process using an amplitude disturbed diffraction pattern method. The localization method is based on the following physical phenomenon: a finger contact modifies the energy distribution of acoustic wave in a solid; these variations depend on the wave frequency and the contact position. The presented method first consists of exciting the object with an acoustic signal with plural frequency components. In a second step, a measured acoustic signal is compared with prerecorded values to deduce the contact position. This position is then used for human-machine interaction (e.g., finger tracking on computer screen). The selection of excitation signals is discussed and a frequency choice criterion based on contrast value is proposed. Tests on a sandwich plate (liquid crystal display screen) prove the simplicity and easiness to apply the process in various solids.
Showing items related by title, author, creator and subject.
An acoustic multi-touch sensing method using amplitude disturbed ultrasonic wave diffraction patterns LIU, Yuan; NIKOLOVSKI, Jean-Pierre; MECHBAL, Nazih; HAFEZ, Moustapha; VERGÉ, Michel (Elsevier, 2010)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 ...
Effect of duplex treatments by plasma nitriding and triode sputtering on corrosion behaviour of 32CDV13 low alloy steel CHALA, Abdelouahad; NOUVEAU, Corinne; DJOUADI, Mohamed Abdou; STEYER, Philippe; MILLET, Jean-Pierre; SAIED, Chahinez; AIDA, Mohammed Salah; LAMBERTIN, Michel (Elsevier, 2006)This paper presents corrosion behaviour of duplex treated low alloy steel. Different kinds of samples were tested: non-treated, plasma nitrided, ZrBN-triode sputtered and ZrBN-duplex treated samples. The corrosion behaviour ...
Corrosion mechanism of a Ni-based alloy in supercritical water: Impact of surface plastic deformation PAYET, Mickaël; MARCHETTI, Loïc; TABARANT, Michel; CHEVALIER, Jean-Pierre (ELSEVIER, 2015)Ni–Fe–Cr alloys are expected to be a candidate material for the generation IV nuclear reactors that use supercritical water at temperatures up to 600 °C and pressures of 25 MPa. The corrosion resistance of Alloy 690 in ...
PAILHES, Jérôme; SALLAOU, Mohammed; NADEAU, Jean-Pierre; FADEL, Georges Michel (American Society of Mechanical Engineers, 2011)This paper presents an energy based approach to functional decomposition that is applicable to the top down design (system to subsystems to components) of mechanical systems. The paper shows that the main functions of ...
Strain gradient plasticity analysis of the strength and ductility of thin metallic films using an enriched interface model BRUGGER, Charles; COULOMBIER, Michel; MASSART, Thierry J.; RAKIN, Jean-Pierre (ELSEVIER, 2010)The mechanical response of thin metallic films is simulated using a two-dimensional strain gradient plasticity finite-element model involving grain boundaries in order to investigate the effect of the thickness, grain shape ...