Toward low-cost highly portable tactile displays with shape memory alloys

Authors:
R. Velázquez;E. E. Pissaloux;M. Hafez;J. Szewczyk
Affiliations:
Université Pierre et Marie Curie --Paris 6, Laboratoire de Robotique de Paris, CNRS FRE 2507, 92265 Fontenay aux Roses, France;Université Pierre et Marie Curie --Paris 6, Laboratoire de Robotique de Paris, CNRS FRE 2507, 92265 Fontenay aux Roses, France;CEA/LIST, 92265 Fontenay aux Roses, France;Université Pierre et Marie Curie --Paris 6, Laboratoire de Robotique de Paris, CNRS FRE 2507, 92265 Fontenay aux Roses, France
Venue:
Applied Bionics and Biomechanics
Year:
2007

Citing 2
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Abstract

This paper presents a new concept of low-cost, high-resolution, lightweight, compact and highly portable tactile display. The prototype consists of an array of 8 × 8 upward/downward independent moveable pins based on shape memory alloy SMA technology. Each tactile actuator consists of an antagonist arranged pair of miniature NiTi SMA helical springs capable of developing a 300 mN pull force at 1.5 Hz bandwidth by using simple forced-air convection. The proposed concept allows the development of 200 g weight tactile instruments of compact dimensions which can be easily carried by a visually disabled user. A detailed technical description of the SMA active element, tactile actuator and tactile display is presented and discussed. Preliminary perceptual results confirm the effectiveness of the display on information transmission.