Touch me Gently: Recreating the Perception of Touch using a Shape-Memory Alloy Matrix

Muthukumarana, Sachith; Elvitigala, Don Samitha; Cortes, Juan Pablo Forero; Matthies, Denys J. C.; Nanayakkara, Suranga

doi:10.1145/3313831.3376491

Cited by 43 publications

(25 citation statements)

References 52 publications

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“…Apparent tactile motion [52] is a tactile illusion in which a sequentially activated series of actuators makes a user believe that one actuator is moving along the skin. Although previous studies have applied this illusion to social haptic devices to reproduce a stroking sensation, they have displayed haptic information without synchronized visual information [14], [15], [16], [53], [54], [55]. Our arm-mounted device, however, is capable of the visuo-haptic presentation of stroking sensations by embedding activation signals in a hand image projected onto the user's forearm.…”

Section: Haptic Devices Controlled By Pvlcmentioning

confidence: 99%

HaptoMapping: Visuo-Haptic Augmented Reality by Embedding User-Imperceptible Tactile Display Control Signals in a Projected Image

Miyatake

Hiraki

Iwai

et al. 2023

IEEE Trans. Visual. Comput. Graphics

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This paper proposes HaptoMapping, a projection-based visuo-haptic augmented reality (VHAR) system, that can render visual and haptic content independently and present consistent visuo-haptic sensations on physical surfaces. HaptoMapping controls wearable haptic displays by embedded control signals that are imperceptible to the user in projected images using a pixel-level visible light communication technique. The prototype system is comprised of a high-speed projector and three types of haptic devices-finger worn, stylus, and arm mounted. The finger-worn and stylus devices present vibrotactile sensations to a user's fingertips. The arm-mounted device presents stroking sensations on a user's forearm using arrayed actuators with a synchronized hand projection mapping. We identified that the developed system's maximum latency of haptic from visual sensations was 93.4 ms. We conducted user studies on the latency perception of our VHAR system. The results revealed that the developed haptic devices can present haptic sensations without user-perceivable latencies, and the visual-haptic latency tolerance of our VHAR system was 100, 159, 500 ms for the finger-worn, stylus, and arm-mounted devices, respectively. Another user study with the arm-mounted device discovered that the visuo-haptic stroking system maintained both continuity and pleasantness when the spacing between each substrate was relatively sparse, such as 20 mm, and significantly improved both the continuity and pleasantness at 80 and 150 mm/s when compared to the haptic only stroking system. Lastly, we introduced four potential applications in daily scenes. Our system methodology allows for a wide range of VHAR application design without concern for latency and misalignment effects.

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Section: Haptic Devices Controlled By Pvlcmentioning

confidence: 99%

HaptoMapping: Visuo-Haptic Augmented Reality by Embedding User-Imperceptible Tactile Display Control Signals in a Projected Image

Miyatake

Hiraki

Iwai

et al. 2023

IEEE Trans. Visual. Comput. Graphics

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Section: Skin‐attachable Haptic Interfacesmentioning

confidence: 99%

“…demonstrated a matrix composed of 15 shape memory alloys (SMA)‐based plasters. [ 8 ] SMA wires in the plasters generate shear forces on the skin. Eight touch gestures were created as follows: (1) grabbing the arm, (2) grabbing the wrist, (3) three taps down the arm, (4) three taps up the arm, (5) stroking down the arm , (6) stroking up the arm, (7) encircling/rolling on the arm, and (8) encircling/rolling on the wrist (Figure 8c).…”

Section: Skin‐attachable Haptic Interfacesmentioning

confidence: 99%

“…SMA actuators are light and compact but can provide adequate feedback on the torso [ 6,7 ] or skin. [ 8,9 ] Magnetorheological (MR) fluid is a smart fluid that increases its viscosity when it is exposed to a magnetic field. MR fluid has been recently used in haptic shoes in VR settings because it can generate considerably large resistive forces with rapid response times.…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances and Opportunities of Active Materials for Haptic Technologies in Virtual and Augmented Reality

Yang

Kim

Jin

et al. 2021

Adv Funct Materials

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Virtual reality and augmented reality (VR/AR) are evolving. The market demands and innovation efforts call for a shift in the key VR/AR technologies and engaging people virtually. Tele‐haptics with multimodal and bilateral interactions are emerging as the future of the VR/AR industry. By transmitting and receiving haptic sensations wirelessly, tele‐haptics allow human‐to‐human interactions beyond the traditional VR/AR interactions. The core technologies for tele‐haptics include multimodal tactile sensing and feedback based on highly advanced sensors and actuators. Recent developments of haptic innovations based on active materials show that active materials can significantly contribute to addressing the needs and challenges for the current and future VR/AR technologies. Thus, this paper intends to review the current status and opportunities of active material‐based haptic technology with a focus on VR/AR applications. It first provides an overview of the current VR/AR applications of active materials for haptic sensing and actuation. It then highlights the state‐of‐the‐art haptic interfaces that are relevant to the materials with an aim to provide perspectives on the role of active materials and their potential integration in haptic devices. This paper concludes with the perspective and outlook of immersive multimodal tele‐haptic interaction technologies.

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“…An array or even a matrix of linear actuators with position control of indentation can also be composed to investigate effects of stimulation patterns and indentation length on affective touch. A similar approach has been validated for a haptic interface using shape memory alloys (Hamdan et al, 2019;Muthukumarana et al, 2020) and can be adapted for affective touch. The research can be extended by modeling the impedance characteristics of human skin.…”

Section: Design Recommendationsmentioning

confidence: 99%

Feel-Good Requirements: Neurophysiological and Psychological Design Criteria of Affective Touch for (Assistive) Robots

et al. 2021

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Previous research has shown the value of the sense of embodiment, i.e., being able to integrate objects into one's bodily self-representation, and its connection to (assistive) robotics. Especially, tactile interfaces seem essential to integrate assistive robots into one's body model. Beyond functional feedback, such as tactile force sensing, the human sense of touch comprises specialized nerves for affective signals, which transmit positive sensations during slow and low-force tactile stimulations. Since these signals are extremely relevant for body experience as well as social and emotional contacts but scarcely considered in recent assistive devices, this review provides a requirement analysis to consider affective touch in engineering design. By analyzing quantitative and qualitative information from engineering, cognitive psychology, and neuroscienctific research, requirements are gathered and structured. The resulting requirements comprise technical data such as desired motion or force/torque patterns and an evaluation of potential stimulation modalities as well as their relations to overall user experience, e.g., pleasantness and realism of the sensations. This review systematically considers the very specific characteristics of affective touch and the corresponding parts of the neural system to define design goals and criteria. Based on the analysis, design recommendations for interfaces mediating affective touch are derived. This includes a consideration of biological principles and human perception thresholds which are complemented by an analysis of technical possibilities. Finally, we outline which psychological factors can be satisfied by the mediation of affective touch to increase acceptance of assistive devices and outline demands for further research and development.

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Touch me Gently: Recreating the Perception of Touch using a Shape-Memory Alloy Matrix

Cited by 43 publications

References 52 publications

HaptoMapping: Visuo-Haptic Augmented Reality by Embedding User-Imperceptible Tactile Display Control Signals in a Projected Image

HaptoMapping: Visuo-Haptic Augmented Reality by Embedding User-Imperceptible Tactile Display Control Signals in a Projected Image

Recent Advances and Opportunities of Active Materials for Haptic Technologies in Virtual and Augmented Reality

Feel-Good Requirements: Neurophysiological and Psychological Design Criteria of Affective Touch for (Assistive) Robots

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