Showing papers by "Michael A. Peshkin published in 2014"
20 Mar 2014
TL;DR: Modeling and experimental results on both ultrasonic and electrostatic surface haptic devices are presented, characterizing their dynamics and their bandwidth for rendering haptic effects.
Abstract: Surface haptic devices modulate the friction between the surface and the fingertip, and can thus be used to create a tactile perception of surface features or textures We present modeling and experimental results on both ultrasonic and electrostatic surface haptic devices, characterizing their dynamics and their bandwidth for rendering haptic effects
83 citations
24 Jun 2014
TL;DR: The design and evaluation of a high fidelity surface-haptic device that slides a finger along a glass plate while friction is controlled via the amplitude modulation of ultrasonic vibrations of the plate, enabling an artifact-free rendering of virtual textures on aGlass plate.
Abstract: We present the design and evaluation of a high fidelity surface-haptic device. The user slides a finger along a glass plate while friction is controlled via the amplitude modulation of ultrasonic vibrations of the plate. A non-contact finger position sensor and low latency rendering scheme allow for the reproduction of fine textures directly on the bare finger. The device can reproduce features as small as 25 \(\upmu \)m while maintaining an update rate of 5 kHz. Signal attenuation, inherent to resonant devices, is compensated with a feedforward filter, enabling an artifact-free rendering of virtual textures on a glass plate.
51 citations
TL;DR: It is found that searches for a material property and an illusory shape were significantly impaired by distractors, while search for an abrupt discontinuity was not, which suggests that they engage primitive detectors in the haptic perceptual system.
Abstract: Haptic interfaces controlled by a single fingertip or hand-held probe tend to display surface features individually, requiring serial search for multiple features. Novel surface haptic devices, however, have the potential to provide displays to multiple fingertips simultaneously, affording the possibility of parallel search. Using variable-friction surface haptic devices, we investigated the ability of participants to detect a target feature among a set of distractors in parallel across the fingers. We found that searches for a material property (slipperiness) and an illusory shape (virtual hole) were significantly impaired by distractors, while search for an abrupt discontinuity (virtual edge) was not. The efficiency of search for edges rendered by surface haptics suggests that they engage primitive detectors in the haptic perceptual system.
5 citations
20 Mar 2014
TL;DR: Two surface haptic displays capable of rendering high-frequency textural content directly to the fingertip exploring the device results in a vivid sense of spatial tactile feature, unlike anything perceived on devices that exhibit longer finger position delays.
Abstract: Summary form only given We present two surface haptic displays capable of rendering high-frequency textural content directly to the fingertip exploring the device The friction of the fingertip with the glass plate is modulated either by electrostatic attraction or ultrasonic out-of-plane vibration The unique rendering capabilities of these devices is possible to a high-speed non-contact position sensing and haptic rendering computed on a real-time embedded controller with a 5000 Hz update rate As the finger explores the virtual surface the friction reduction signal, a sine wave at ultrasonic frequency, is modulated with the friction force profile of the texture, encoded in space The combination of high-speed position sensing and low latency haptic rendering results in a vivid sense of spatial tactile feature, unlike anything perceived on devices that exhibit longer finger position delays
2 citations