Study on bow and body correlation model for accurate reproduction of archery in xR environment

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K11345
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 59020:Sports sciences-related
• Research Institution: Tokai University (2022-2023); Kanagawa Institute of Technology (2021)
• Principal Investigator: Yasumoto Masasuke 東海大学, 情報理工学部, 特任准教授 (00609448)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 弓デバイス / UI / HCI / xR / 生体計測 / デジタルスポーツ

Outline of Final Research Achievements

We attempted to build a system that simultaneously visualizes the mutual information between the body and the bow in real time to facilitate the analysis process, provide feedback to the athlete, and display this information on an HMD. We repeated the creation, experimentation, and verification of the bow device to see if we could maintain accuracy and create a sense of reality with alternative stimuli and mechanisms without the use of arrows. In order to improve the measurement system with strain gauges, we made multiple attempts to produce a bow dedicated to measurement. Experiments were actually conducted using arrows of multiple weights and lengths to clarify the relationship between the strain gauge values, the force applied to the string, and the arrow's initial velocity. These results enabled us to simulate with high accuracy the position of the string pull, the amount of pull, and the initial velocity of the arrow when used.

Free Research Field

メディアアート

Academic Significance and Societal Importance of the Research Achievements

矢の有無による弓の挙動の違いを明らかにし、さらに矢を使用しない場合でも十分に弱いリムであれば弓が壊れることはないことを実証した。複数の歪ゲージを使用することで正確に弦の弾く位置や引き量を計算可能にした。また矢を使った際の歪、初速、グリップにかかる衝撃を明らかにすることで仮に矢を用いた際にどのように飛んでいくのかが歪ゲージの値から明らかになった。これらの事から矢を使うことなく室内の狭い空間においても本物と同等にアーチェリーのトレーニングを行ったり、VR装置やプロジェクタによる映像の投影と組み合わせることで正確なシミュレーションが可能となった。