Handling of Virtual Contact in Immersive Virtual Environments: Beyond Visuals

Lindeman, Robert W.; Templeman, James N.; Sibert, John L.; Cutler, J.R.

doi:10.1007/s100550200014

Cited by 27 publications

(14 citation statements)

References 30 publications

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“…Despite this simple tactor feedback algorithm and the fact that users could not adequately distinguish the second and third types of tactile feedback, the associated human-subject experiment showed a significant collision avoidance benefit to the tactile feedback over the other three tested modalities. Similar studies on the use of vibrotactile feedback for spatial contact feedback in an immersive virtual environment were shown in [22] and [15]. More recently, Tadakuma and Howe [20] used RC-servo paddles to provide contact location feedback on the arm for whole-arm telemanipulation.…”

Section: Tactile Feedback For Motion Guidancementioning

confidence: 82%

Spatially distributed tactile feedback for kinesthetic motion guidance

Kapur

Jensen

Buxbaum

et al. 2010

2010 IEEE Haptics Symposium

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Apraxic stroke patients need to perform repetitive arm movements to regain motor functionality, but they struggle to process the visual feedback provided by typical virtual rehabilitation systems. Instead, we imagine a low cost sleeve that can measure the movement of the upper limb and provide tactile feedback at key locations. The feedback provided by the tactors should guide the patient through a series of desired movements by allowing him or her to feel limb configuration errors at each instant in time. After discussing the relevant motion capture and actuator options, this paper describes the design and programming of our current prototype, a wearable tactile interface that uses magnetic motion tracking and shaftless eccentric mass motors. The sensors and actuators are attached to the sleeve of an athletic shirt with novel plastic caps, which also help focus the vibration on the user's skin. We connect the motors in current drive for improved performance, and we present a full parametric model for their in situ dynamic response (acceleration output given current input). Disciplines Engineering | Mechanical Engineering ABSTRACTApraxic stroke patients need to perform repetitive arm movements to regain motor functionality, but they struggle to process the visual feedback provided by typical virtual rehabilitation systems. Instead, we imagine a low cost sleeve that can measure the movement of the upper limb and provide tactile feedback at key locations. The feedback provided by the tactors should guide the patient through a series of desired movements by allowing him or her to feel limb configuration errors at each instant in time. After discussing the relevant motion capture and actuator options, this paper describes the design and programming of our current prototype, a wearable tactile interface that uses magnetic motion tracking and shaftless eccentric mass motors. The sensors and actuators are attached to the sleeve of an athletic shirt with novel plastic caps, which also help focus the vibration on the user's skin. We connect the motors in current drive for improved performance, and we present a full parametric model for their in situ dynamic response (acceleration output given current input).

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Section: Tactile Feedback For Motion Guidancementioning

confidence: 82%

Spatially distributed tactile feedback for kinesthetic motion guidance

Kapur

Jensen

Buxbaum

et al. 2010

2010 IEEE Haptics Symposium

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“…Tactile interfaces have been used to enhance the realism, or the sense of presence, of virtual events such as tapping (e.g., Okamura, Cutkosky, & Dennerlein, 2001), handling contacts (Lindeman, Templeman, Sibert, & Cutler, 2002), and even driving a scooter (Deligiannidis, 2005;Deligiannidis & Jacob, 2006) in a virtual environment (see also Hoffman, 1998;Hoffman, Hollander, Schroder, Rousseau, & Furness, 1998;Kontarinis & Howe, 1995;see Carlin, Hoffman, & Weghorst, 1997, for the use of tactile stimuli in virtual reality environments to treat certain phobias). Tactile stimulation, in the form of haptic interfaces, has also been adopted in concert with stimulation from other sensory modalities in order to provide reliable feedback in a variety of different interface settings, such as, for example, in mouse-pointing tasks (e.g., Akamatsu, MacKenzie, & Hasbroucq, 1995; see also Cockburn & Brewster, 2005;Hoffman et al, 1998;Vitense, Jacko, & Emery, 2003).…”

Section: Tactile Processing Across the Body Surfacementioning

confidence: 99%

The Body Surface as a Communication System: The State of the Art after 50 Years

Gallace

Tan

Spence

2007

Presence: Teleoperators and Virtual Environments

106

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The suggestion that the body surface might be used as an additional means of presenting information to human-machine operators has been around in the literature for nearly 50 years. Although recent technological advances have made the possibility of using the body as a receptive surface much more realistic, the fundamental limitations on the human information processing of tactile stimuli presented across the body surface are, however, still largely unknown. This literature review provides an overview of studies that have attempted to use vibrotactile interfaces to convey information to human operators. The importance of investigating any possible central cognitive limitations (i.e., rather than the peripheral limitations, such as related to sensory masking, that were typically addressed in earlier research) on tactile processing for the most effective design of body interfaces is highlighted. The applicability of the constraints emerging from studies of tactile processing under conditions of unisensory (i.e., purely tactile) stimulus presentation, to more ecologically valid conditions of multisensory stimulation, is also discussed. Finally, the results obtained from recent studies of tactile information processing under conditions of multisensory stimulation are described, and their implications for haptic/tactile interface design elucidated. IntroductionWe chose to begin this paper with a quote from one of the first and foremost researchers to have systematically approached the problem of cutaneous communication using the body surface. The quote, dating from 1960, and the paper from which the quote was taken, nicely highlight the novel interest in the topic as well as the technological constraints limiting the study of tactile information processing across the body at the time that Frank Geldard was writing. What's more, the choice of the date for such a citation is by no means accidental, given that in 1960 a group of investigators conferred at Fort Knox, Kentucky in order to discuss the basic problems associated with any attempt to communicate through the skin (see Hawkes, 1960, for a summary of the papers presented at that symposium). Therefore, we believe that 1960 can, in some sense, be taken to represent the "symbolic" birth of the first extensive research in this field. The place of the meeting was by no means coincidental either, given the strategic importance at that time (and even today), of studying novel means of communication for both military and civilian purposes.Nearly 50 years later, technology has moved on a long way, and a new wave of interest has recently started to resurface regarding the theoretical and practical ad-

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“…There are a number of parameters that can be used to vary the characteristics of a vibrotactile stimulus [8]. For a single tactor, these include frequency, amplitude, temporal delay, and pulse patterns.…”

Section: Introductionmentioning

confidence: 99%

Towards Effective Information Display Using Vibrotactile Apparent Motion

Kohli¹,

Niwa²,

Noma³

et al.

2006 14th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems

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In this paper, we explore the use of tactile apparent motion at different speeds for information display. A prototype vibrotactile tactor array was constructed, consisting of three rings of five voice-coil tactors each, and mounted on the upper arm of test subjects. The results of two experiments are presented: a study on the sensitivity to differences in apparent motion speed, and a study on users' ability to differentiate four motion patterns at three different speeds. Users had little trouble with pattern identification, but found absolute speed recognition difficult. Several ideas for future exploration of tactile apparent motion for general-purpose information displays are presented.

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Handling of Virtual Contact in Immersive Virtual Environments: Beyond Visuals

Cited by 27 publications

References 30 publications

Spatially distributed tactile feedback for kinesthetic motion guidance

Spatially distributed tactile feedback for kinesthetic motion guidance

The Body Surface as a Communication System: The State of the Art after 50 Years

Towards Effective Information Display Using Vibrotactile Apparent Motion

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