Perceptual Issues Improve Haptic Systems Performance

Vicentini, Marco; Botturi, Debora

doi:10.5772/8711

Cited by 5 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sense of mechanical vibration of the skin can go as high as 10 kHz, but the ability to discriminate one vibration frequency from one another declines above 320 Hz. In general, human can discriminate vibration cues in the range of frequency 50-400 Hz (Vicentini and Botturi, 2010).…”

mentioning

confidence: 99%

Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

et al. 2017

View full text Add to dashboard Cite

In this paper, we discuss the development of cost effective, wireless, and wearable vibrotactile haptic device for stiffness perception during an interaction with virtual objects. Our experimental setup consists of haptic device with five vibrotactile actuators, virtual reality environment tailored in Unity 3D integrating the Oculus Rift Head Mounted Display (HMD) and the Leap Motion controller. The virtual environment is able to capture touch inputs from users. Interaction forces are then rendered at 500 Hz and fed back to the wearable setup stimulating fingertips with ERM vibrotactile actuators. Amplitude and frequency of vibrations are modulated proportionally to the interaction force to simulate the stiffness of a virtual object. A quantitative and qualitative study is done to compare the discrimination of stiffness on virtual linear spring in three sensory modalities: visual only feedback, tactile only feedback, and their combination. A common psychophysics method called the Two Alternative Forced Choice (2AFC) approach is used for quantitative analysis using Just Noticeable Difference (JND) and Weber Fractions (WF). According to the psychometric experiment result, average Weber fraction values of 0.39 for visual only feedback was improved to 0.25 by adding the tactile feedback.

show abstract

mentioning

confidence: 99%

Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

et al. 2017

View full text Add to dashboard Cite

show abstract

Vacuum curette lumbar discectomy mechanics for use in spine surgical training simulators

Cotter

Mongrain

Driscoll

2022

Sci Rep

View full text Add to dashboard Cite

Simulation in surgical training is a growing field and this study aims to understand the force and torque experienced during lumbar spine surgery to design simulator haptic feedback. It was hypothesized that force and torque would differ among lumbar spine levels and the amount of tissue removed by ≥ 7%, which would be detectable to a user. Force and torque profiles were measured during vacuum curette insertion and torsion, respectively, in multiple spinal levels on two cadavers. Multiple tests per level were performed. Linear and torsional resistances of 2.1 ± 1.6 N/mm and 5.6 ± 4.3 N mm/°, respectively, were quantified. Statistically significant differences were found in linear and torsional resistances between all passes through disc tissue (both p = 0.001). Tool depth (p < 0.001) and lumbar level (p < 0.001) impacted torsional resistance while tool speed affected linear resistance (p = 0.022). Average differences in these statistically significant comparisons were ≥ 7% and therefore detectable to a surgeon. The aforementioned factors should be considered when developing haptic force and torque feedback, as they will add to the simulated lumbar discectomy realism. These data can additionally be used inform next generation tool design. Advances in training and tools may help improve future surgeon training.

show abstract

How force perception changes in different refresh rate conditions

Scandola

Vicentini

Fiorini

2011

2011 15th International Conference on Advanced Robotics (ICAR)

Self Cite

View full text Add to dashboard Cite

In this work we consider the role of different refresh rates of the force feedback physical engine for haptics environments, such as robotic surgery and virtual reality surgical training systems. Two experimental force feedback tasks are evaluated in a virtual environment. Experiment I is a passive contact task, where the hand-grip is held waiting for the force feedback perception given by the contact with virtual objects. Experiment II is an active contact task, where a tool is moved in a direction until the contact perception with a pliable object. Different stiffnesses and refresh rates are factorially manipulated. To evaluate differences in the two tasks, we account for latency time inside the wall, penetration depth, and maximum force exerted against the object surface. The overall result of these experiments shows an improved sensitivity in almost all variables considered with refresh rates of 500 and 1,000 Hz compared with a refresh rate of 250 Hz, but no improved sensitivity is showed among them.978-1 -4577-1159-6/11/$26.00 ©2011 IEEE

show abstract

Perceptual Issues Improve Haptic Systems Performance

Cited by 5 publications

References 38 publications

Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

Wearable Vibrotactile Haptic Device for Stiffness Discrimination during Virtual Interactions

Vacuum curette lumbar discectomy mechanics for use in spine surgical training simulators

How force perception changes in different refresh rate conditions

Contact Info

Product

Resources

About