Feeling the Grass Grow: Making Midair Haptic Parameters Visible, Touchable and Controllable
Mingxin Zhang, Qirong Zhu, Yasutoshi Makino, Hiroyuki Shinoda
TL;DR
The work tackles the complexity of designing and controlling multi-parameter mid-air haptic textures by integrating an ultrasound-based haptic system (AUTD3) with a real-time Growing Grass visualization. A 1-D Sequential-Line-Search (SLS) framework is employed to streamline multi-parameter tuning, while Spatial Temporal Modulation (STM) and a 4-unit array deliver dynamic tactile feedback. The approach maps seven haptic parameters to an intuitive visualization, enabling synchronized, real-time visual and haptic updates. This combination aims to enhance user intuition, realism, and shareability of mid-air haptic experiences, with potential implications for richer virtual interactions and easier parameter exploration.
Abstract
In this paper, we present an ultrasound mid-air haptic interaction system that integrates a designed visualization of haptic parameters while maintaining ease of control. The design of corresponding haptic parameters for real-world tactile textures is a complex task. Furthermore, users often face difficulties in simultaneously controlling multi-dimensional haptic parameters to achieve the desired vibration feedback. To address these challenges, the SLS optimization method facilitates user control of these multi-dimensional parameters through a simple one-dimensional slider. Concurrently, our system employs the "Growing Grass" metaphor to visualize haptic parameter adjustments in real-time. This approach combining visual and haptic sensations can bring richer experiences and generate a realistic sensation of touching a grassy surface. Our objective is to enhance users' intuitive comprehension of haptic parameters through this innovative system.