利用單一滾球滑動裝置擴增虛擬實境控制器之主動式觸覺探索體驗

RollingStone: Using Single Slip Taxel for Enhancing Active Finger Exploration with a Virtual Reality Controller

駱若瑀(Jo-Yu Lo)

指導教授 ： 陳炳宇

國立臺灣大學/電機資訊學院/資訊工程學研究所/碩士(2018年)

https://doi.org/10.6342/NTU201801183

摘要

本篇論文提出 RollingStone，在虛擬實境控制器上利用單一滾球產生手指撫摸表面的滑動感及材質。當使用者在虛擬表面上移動控制器，為了模擬手指撫摸表面的感受，我們製造與移動方向相反的滑動，同時調整滾球的速度來改變施予手指上的橫向力。透過對應手的移動速度給予不同的橫向力，能創造出不同材質的感受。RollingStone 是一個以滾球滑動裝置為實作基礎的虛擬實境控制器，由兩顆馬達驅動滾球，產生二維空間的轉動。能夠同時提供短暫與連續性的滑動。透過第一個實驗，我們確認了調整手指與滾球的相對速度可以改變使用者對表面材質的感受。在後續的兩個心理學實驗中，我們分別測試使用者對滑動速度與角度差值的感知極限，並以實驗結果作為觸覺回饋及應用程式的設計考量。最終的評估實驗顯示，使用者同意且認為 RollingStone 能擴增使用虛擬實境控制器的體驗。

關鍵字

觸覺 ； 控制器設計 ； 觸覺顯示器 ； 滑動裝置 ； 虛擬實境

並列摘要

We propose using a single slip tactile pixel on virtual reality controllers to produce sensations of finger sliding and textures. When a user moves the controller on a virtual surface, we add a slip opposite to the movement, creating an illusion of a finger that is sliding on the surface, while varying the slip feedback changes lateral forces on fingertip. When coupled with hand motion the lateral forces can be used to create perceptions of artificial textures. RollingStone has been implemented as a prototype VR controller consisting of a ball-based slip display positioned under the user's fingertip. Within the slip display, a pair of motors actuates the ball, which is capable of generating both short- and long-term two-degree-of-freedom slip feedback. An exploratory study was conducted to ensure that changing the relative motion between the finger and the ball could alter the perceptions conveying the properties of a texture. The following two perception-based studies examined the minimum changes in speed of slip and angle of slip that are detectable by users. The results help us to design haptic patterns as well as our prototype applications. Finally, our preliminary user evaluation indicated that participants welcomed RollingStone as a useful addition to the range of VR controllers.

並列關鍵字

Haptics ； Controller Design ； Tactile Display ； Slip Display ； Virtual Reality

參考文獻

[1] M. Amberg, F. Giraud, B. Semail, P. Olivo, G. Casiez, and N. Roussel. Stimtac: a tactile input device with programmable friction. In Proceedings of the 24th annual ACM symposium adjunct on User interface software and technology, pages 7–8. ACM, 2011.

[2] O. Bau, I. Poupyrev, A. Israr, and C. Harrison. Teslatouch: Electrovibration for touch surfaces. In Proceedings of the 23Nd Annual ACM Symposium on UserInterface Software and Technology, UIST ’10, pages 283–292, New York, NY, USA, 2010. ACM.

[3] H. Benko, C. Holz, M. Sinclair, and E. Ofek. Normaltouch and texturetouch: High-fidelity 3d haptic shape rendering on handheld virtual reality controllers. In Proceedings of the 29th Annual Symposium on User Interface Software andTechnology, UIST ’16, pages 717–728, New York, NY, USA, 2016. ACM.

[4] M. Bianchi. A fabric-based approach for wearable haptics. Electronics, 5(3):44, 2016.

[5] M. Biet, F. Giraud, and B. Lemaire-Semail. Squeeze film effect for the design of an ultrasonic tactile plate. IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 54(12), 2007.