R. Velázquez, E. E. Pissaloux, M. Hafez, J. Szewczyk, "Toward Low-Cost Highly Portable Tactile Displays with Shape Memory Alloys", Applied Bionics and Biomechanics, vol. 4, Article ID 543472, 14 pages, 2007. https://doi.org/10.1080/11762320701470517
Toward Low-Cost Highly Portable Tactile Displays with Shape Memory Alloys
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.
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