Midair Haptic Presentation Using Concave Reflector

Ariga, Kentaro; Fujiwara, Masahiro; Makino, Yasutoshi; Shinoda, Hiroyuki

doi:10.1007/978-3-030-58147-3_34

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Expanding the workspace of midair ultrasound haptics using additional physical devices is proposed. Ariga et al extended the workspace using a large concave reflector [29], [30]. Howard et al and Villa et al extended the workspace by physically moving an AUTD device.…”

Section: B Combination Of Airborne Focused Ultrasound and Physical Ob...mentioning

confidence: 99%

UltLever: Ultrasound-Driven Passive Haptic Actuator Based on Amplifying Radiation Force Using a Simple Lever Mechanism

Morisaki,

Kamigaki,

Fujiwara

et al. 2024

IEEE Trans. Haptics

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A lightweight haptic display that does not interfere with the user's natural movement is required for an immersive haptic experience. This study proposes a lightweight, powerful, and responsive passive haptic actuator driven by airborne focused ultrasound. This 6.2 g completely plastic passive device amplifies an applied ultrasound radiation force by a factor of 35 using a simple lever mechanism, presenting an amplified force of 0.7 N to the user's finger pad. 2-30 Hz vibration can also be presented. Since the radiation force is presented at the speed of sound, the amplified force is presented at high speed even with the high amplification rate of a lever, achieving such strong force and vibration presentation. Physical measurements showed that the amplified force was 0.7 N for the 20.48 mN input radiation force, and the amplitude of the presented vibration was over 0.1 N at 2-30 Hz. A psychophysical experiment showed that the vibration and force were perceivable with a device output level of -7.7 dB. In the future, we will explore methodologies around device design to present desired tactile sensations.

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Section: B Combination Of Airborne Focused Ultrasound and Physical Ob...mentioning

confidence: 99%

UltLever: Ultrasound-Driven Passive Haptic Actuator Based on Amplifying Radiation Force Using a Simple Lever Mechanism

Morisaki,

Kamigaki,

Fujiwara

et al. 2024

IEEE Trans. Haptics

View full text Add to dashboard Cite

show abstract

“…This issue can be tackled through software (Top right), hardware (Bottom right) or combined approaches. increasing its complexity [2]. Finally, an alternative approach consists in making the UMH arrays mobile, either by mounting them on the user [77] or onto robotic manipulators, in an approach akin to encounter-type haptics [7].…”

Section: Workpace Compatibilitymentioning

confidence: 99%

Ultrasound Mid-Air Tactile Feedback for Immersive Virtual Reality Interaction

Howard

Marchal

Pacchierotti

2022

Human–Computer Interaction Series

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Ultrasound mid-air haptic (UMH) devices are promising for tactile feedback in virtual reality (VR), as they do not require users to be tethered to, hold, or wear any device. This approach is less cumbersome, easy to set up, can simplify tracking, and leaves the hands free for concurrent interactions. This chapter explores work conducted at CNRS-IRISA dealing with the challenges arising from the integration of UMH interfaces in immersive VR through three main axes. These are discussed in the wider context of the state-of-the-art on UMH for augmented and virtual reality, and illustrated through several VR use-cases. A first axis deals with device integration into the VR ecosystem. Interaction in immersive VR is based on the synergy between complex input devices allowing real-time tracking of the user and multimodal feedback devices delivering a coherent visual, auditory and haptic picture of a simulated virtual environment (VE). Using UMH in immersive VR therefore hinges on integrating UMH devices such that their operation does not interfere with other input and feedback devices. It is also critical to ensure that UMH feedback is adequately synchronised and co-located with respect to other stimuli, and delivered within a workspace that is compatible with that of VR interaction. Regarding this final point, we propose PUMAH, a robotic solution for increasing the usable workspace of UMH devices. The second and third axes, respectively, focus on stimulus perception and rendering of VE properties. Virtual object properties can be rendered in a variety of ways, through e.g. amplitude modulation (AM) or spatio-temporal modulation (STM), with many parameters (modulation frequency, spatial sampling, etc.) coming into play, raising questions about the limits of the design space. To tackle this challenge, we begin by conducting psychophysical experimentation to understand the usable ranges for stimulus parameters and understand the perceptual implications of stimulus design choices. We propose an open-source software framework intended to facilitate UMH stimulus design and perceptual evaluation. These results in turn serve as the basis for the design and evaluation of rendering schemes for VR. Using amplitude variations along a focal point path in STM, we investigate the possibility of rendering geometric details and in a second step, sensations of stiffness in VR.

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