Tactile Rendering With Shape-Memory-Alloy Pin-Matrix

This paper presents a novel pin-matrix tactile-display device that exhibits some advantageous features for the blind: low cost, lightweight, compactness, and high portability. The prototype consists of 64 tactile pins actuated by shape memory alloys with 2.6-mm spatial resolution (Braille-like). Unlike existing devices, the full display weighs only 200 g, and its compact dimensions make it easy to carry. A technical overview of the system is presented, as well as preliminary results on shape recognition, to evaluate its performance on tactile rendering.

[1]  Michael Wiertlewski,et al.  A compact tactile display for the blind with shape memory alloys , 2006, Proceedings 2006 IEEE International Conference on Robotics and Automation, 2006. ICRA 2006..

[2]  Craig A. Rogers,et al.  One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials , 1990 .

[3]  L. Kempe.  Handbook of Physiology. Section I. The Nervous System , 1982 .

[4]  Jérôme Szewczyk,et al.  A low-cost highly-portable tactile display based on shape memory alloy micro-actuators , 2005, IEEE Symposium on Virtual Environments, Human-Computer Interfaces and Measurement Systems, 2005..

[5]  S. Hirose,et al.  Mathematical model and experimental verification of shape memory alloy for designing micro actuator , 1991, [1991] Proceedings. IEEE Micro Electro Mechanical Systems.

[6]  Naoki Kawakami,et al.  Control Method for a 3D Form Display with Coil-type Shape Memory Alloy , 2005, Proceedings of the 2005 IEEE International Conference on Robotics and Automation.

[7]  Jérôme Szewczyk,et al.  A Computational–Experimental Thermomechanical Study of Shape Memory Alloy Microcoils and Its Application to the Design of Actuators , 2006 .