ガラスの機械的特性と厚さがTPaD性能に与える影響
How the Mechanical Properties and Thickness of Glass Affect TPaD Performance
超音波振動で指先の摩擦を変調する触覚ディスプレイTPaDについて、ガラスの密度・ヤング率・厚さが摩擦低減能力と消費電力の関係にどう影響するかを実験とモデルで調べた。
著者: Heng Xu, Michael A. Peshkin, J. Edward Colgate
分類: cs.HC, cs.RO
原文アブストラクト
One well-known class of surface haptic devices that we have called TPaDs (Tactile Pattern Displays) uses ultrasonic transverse vibrations of a touch surface to modulate fingertip friction. This paper addresses the power consumption of glass TPaDs, which is an important consideration in the context of mobile touchscreens. In particular, based on existing ultrasonic friction reduction models, we consider how the mechanical properties (density and Young's modulus) and thickness of commonly-used glass formulations affect TPaD performance, namely the relation between its friction reduction ability and its real power consumption. Experiments performed with eight types of TPaDs and an electromechanical model for the fingertip-TPaD system indicate: 1) TPaD performance decreases as glass thickness increases; 2) TPaD performance increases as the Young's modulus and density of glass decrease; 3) real power consumption of a TPaD decreases as the contact force increases. Proper applications of these results can lead to significant increases in TPaD performance.
