Recording and Replaying Technology of Tactile Feeling

2019 Fiscal Year Final Research Report

• Project Area: Understanding human recognition of material properties for innovation in SHITSUKAN science and technology
• Project/Area Number: 15H05923
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Complex systems
• Research Institution: The University of Electro-Communications
• Principal Investigator: Kajimoto Hiroyuki 電気通信大学, 大学院情報理工学研究科, 教授 (80361541)
• Co-Investigator(Kenkyū-buntansha): 岡本 正吾 名古屋大学, 工学研究科, 准教授 (10579064)
• Project Period (FY): 2015-06-29 – 2020-03-31
• Keywords: 触覚 / 質感 / バーチャルリアリティ / ヒューマンインタフェース

Outline of Final Research Achievements

Many of the tactile expressions that have been realized so far have not been fully able to express the tactile feeling of textures. This may be due to a lack of knowledge about the spatiotemporal features of skin deformation. In light of this, this study aimed at the following two points. The first is to develop a spatiotemporal high-resolution skin deformation measurement device to elucidate the components of tactile feeling. The second is the construction of an optimal design method for tactile feedback on touch panels, which has high expectations from the industry.
For the former, we have constructed a system to capture the skin deformation when the fingertip skin moves across a textured surface in three dimensions. For the latter, we combined the presentation of mechanical vibrations with the presentation of friction caused by static electricity, and realized a method to optimize the generation of tactile sensation.

Free Research Field

バーチャルリアリティ

Academic Significance and Societal Importance of the Research Achievements

皮膚変形の計測に関しては、特に大きな凹凸の場合、皮膚の法線方向変位は明瞭に同じ間隔の繰り返しが観察されるのに対し、せん断方向変位は顕著な動きが無いことが明らかとなった。タッチパネルによる触感表現については、二つのタイプの触感提示原理を併用することで高品質な触感刺激を提示できることや、接触力の法線方向とせん断方向の接触力の波のずれ（位相差）にもテクスチャの情報が多く含まれていること等が明らかとなった。こうした成果は、記号提示にとどまらない触感表現を目指す触覚ディスプレイ設計において、法線方向・せん断方向の変位をどのような時間・空間解像度で設計すればよいかという指針を与えるものと言える。