Toward quality texture display: vibrotactile stimuli to modify material roughness sensations

Asano, Shuhei; Okamoto, Shogo; Matsuura, Yoichiro; Yamada, Yoji

doi:10.1080/01691864.2014.913502

Cited by 18 publications

(11 citation statements)

References 23 publications

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“…For each trial, the participants explored the materials and rated the perceived fine-and macroroughness (0-100) by comparing them with the references. Fine-roughness sensations were defined as the roughness resulting from densely arranged small bumps, while macro-roughness was defined as roughness resulting from sparsely arranged edges [11]. The reference values for fine-and macro-roughness, which were defined as the sensations caused by exploring sand paper and urethane, respectively, were set to 50.…”

Section: Methodsmentioning

confidence: 99%

“…Taking the stimulus distribution in the finger pad into consideration may be a possible approach to enhance the effect on macro-roughness modulation. Compared with literature [17], [25], [11], the proposed system covers a sufficiently wide range of the fine-roughness dimension. For the tracing paper, the perceived fine-roughness for a modulation gain of 100 is 12 times rougher than that of the original texture.…”

Section: Electrotactile Augmentation Alters the Perceived Roughness Omentioning

confidence: 96%

“…Hachisu et al [10] proposed a method for modulating material perception using vibratory subtraction and addition. Asano et al [11] succeeded in altering the perceived roughness of real materials by applying vibrations to the material. Texture transformation (especially texture reduction) using the squeeze film effect has also been proposed [12], [13].…”

Section: Related Workmentioning

confidence: 99%

“…Specifically, the frequency of vibrotactile sensations was changed according to the velocity. Rather than controlling the frequency of the sinusoidal stimulus [11], we controlled the pulse frequency of the electrical stimulus. With the magnitude of velocity (assuming that velocity is in 2D) and modulation gain being v f and m g , respectively, pulse frequency f p is calculated as follows:…”

Section: System Architecture and Stimulus Designmentioning

confidence: 99%

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Material Roughness Modulation via Electrotactile Augmentation

Yoshimoto

Kuroda

Imura

et al. 2015

IEEE Trans. Haptics

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Tactile exploration of a material's texture using a bare finger pad is a daily human activity. However, modern tactile displays do not allow users to experience the natural sensations of a material when artificial sensations are presented. We propose an electrotactile augmentation technique capable of superimposing vibrotactile sensations in a finger pad, thereby allowing the texture modulation of real materials. Users attach two stimulus electrodes to the middle phalanx of a finger and a grounded electrode at the base of the finger in order to evoke nerve activity. This paper evaluates the proposed electrotactile augmentation for roughness modulation of real materials. First, we introduce the principle of the electrotactile display, which presents artificial sensations at the finger pad. We then confirm that the perceived frequency of mechanical vibration at the finger pad can be shifted using electrotactile augmentation. Finally, we discuss a user study, wherein participants rated the roughness of real materials explored using the proposed system. Experimental results indicate that fine- and macro-roughness perceptions of real materials can be altered using electrotactile augmentation.

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Section: Methodsmentioning

confidence: 99%

Section: Electrotactile Augmentation Alters the Perceived Roughness Omentioning

confidence: 96%

Section: Related Workmentioning

confidence: 99%

Section: System Architecture and Stimulus Designmentioning

confidence: 99%

See 2 more Smart Citations

Material Roughness Modulation via Electrotactile Augmentation

Yoshimoto

Kuroda

Imura

et al. 2015

IEEE Trans. Haptics

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“…A unique example may be the method proposed by Konyo et al [16,17] that delivered the sense of the stick-slip phenomenon by using high-frequency (250 Hz) vibrotactile stimuli. In terms of the presentation of virtual materials, vibrotactile approaches are especially effective for surface roughness (e.g., [18][19][20][21][22]). Moreover, the vibrotactile stimuli are used for hardness [23][24][25][26] and softness [17,[27][28][29] presentation, respectively, in tapping and pushing the object surface.…”

Section: Introductionmentioning

confidence: 99%

Friction perception resulting from laterally vibrotactile stimuli

2017

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When a human rubs a contactor that is vibrating laterally at 3-10 Hz with an amplitude of ~1 mm, the friction is perceived as being greater than that sensed when touching a stationary contactor. This phenomenon could be exploited for a new vibrotactile approach to friction perception; however, the principles behind it have yet to be explained. In this study, we hypothesized that the perceived friction increases because of the Stribeck characteristic and stick-slip phenomenon of friction, whereby the friction varies depending on the relative velocity between a subject's fingertip and contactor. The relative velocity instantaneously decreases because of the lateral vibration of the contactor, while the friction rises during the same period. To test this hypothesis, we simulated the friction forces between a fingertip and a vibrating contactor. Furthermore, we performed psychophysical experiments using five participants, in which each explored a vibrating contactor and subjectively compared the perceived friction under several stimulus conditions. The simulated friction forces, the results of the psychophysical experiments, and physical observation suggested that the transient increases in friction caused by lateral vibration of the contactor influenced friction perception for a laterally vibrating contactor.

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