Multi-mode soft haptic thimble for haptic augmented reality based application of texture overlaying

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This paper presents a novel thimble-shape haptic display for multi-mode tactile feedback at fingertips. The device has two special characteristics. Multi-mode feedback, i.e., static pressure, high-frequency vibration, and impact force, can be generated via a single actuator mechanism of a pneumatic chamber controlled by high-speed valves. Additionally, the actuator's softness makes this device a “feel-through” tactile display where the user simultaneously feels responses from a real object and synthetic feedback. This makes the device a fit for haptic augmented reality-based display where real and virtual touch feedback is merged into single feedback that haptically “augments” the real world. A layered combination of flexible and non-flexible silicone membrane surrounds the air- cavity for desired efficiency, and systematic valve control algorithms are developed for rich haptic effects. The experiments confirmed that the system generated a static force up to 7 N, acceleration magnitude up to 1.4 G, and frequency up to 250 Hz. The device exhibits two realistic tactile signals, i.e., virtual textures and button clicks, based on real signals and a physical surface that are augmented with two haptic signals.The user studies revealed that the participants found the virtually overlaid textures and buttons to be perceptually similar to their real counterparts.

OriginalsprogEngelsk
Artikelnummer102272
TidsskriftDisplays
Vol/bind74
ISSN0141-9382
DOI
StatusUdgivet - sep. 2022
Eksternt udgivetJa

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© 2022 Elsevier B.V.

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