Wearable Finger Pad Sensor for Tactile Textures Using Propagated Deformation on a Side of a Finger: Assessment of Accuracy

Sato, Shunsuke; Okamoto, Shogo; Matsuura, Yoichiro; Yamada, Yoji

doi:10.1109/smc.2015.164

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Romano et al [14] measured contact vibration data for a large number of natural textures using accelerometers, position sensors, and force sensors attached to pens and attempted to reproduce these results on a tactile display. Sato et al [15] proposed a method of indirectly measuring the shear displacement of the finger surface using an accelerometer to measure changes on the finger side.…”

Section: Related Workmentioning

confidence: 99%

Measurement System for Finger Skin Displacement on a Textured Surface Using Index Matching

Kaneko

Kajimoto

2020

Applied Sciences

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Understanding the relationship between the displacement of the skin when tracing a textured object and the resulting subjective sensations is essential in designing tactile displays. Previous studies observed skin displacement using flat glass plates or uneven surfaces that do not optically interfere with finger surface observations. In contrast, no direct method for observing skin surface displacement on a texture exists. We propose a system that enables observation of the interaction between a textured surface and the skin of the finger using an index-matching technique. In the proposed system, a texture plate is immersed in oil having the same refractive index as the plate, and measurements are made when the interface is nearly optically transparent. Further, printed markers are attached to the skin of the finger, and their movements analyzed using an image-processing algorithm. The system enables spatial measurement of the skin shear and the vibration of the contact area. Evaluation experiments conducted on a 1D textured surface having a pitch of 0.6 mm verify the feasibility of the proposed system. Optical misalignment simulation results indicate that the system is slightly less accurate than type-I mechanoreceptors but can measure skin deformation on a texture and also observe it spatially and temporally.

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Section: Related Workmentioning

confidence: 99%

Measurement System for Finger Skin Displacement on a Textured Surface Using Index Matching

Kaneko

Kajimoto

2020

Applied Sciences

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“…The skin deformation at the radial side can be measured by an accelerometer designed for the measurement of small and fast displacements. This study is based on our previous publications [20,21] in which we introduced the principles of measurement and the linear causality between the deformations of the pad and the radial side of a finger. In this paper, we also assess the accuracy of our method by means of a comparison with a method based on force sensing after specifying the skin impedance of individuals, as well as describing the principles used for the estimation.…”

Section: Introductionmentioning

confidence: 99%

Wearable finger pad deformation sensor for tactile textures in frequency domain by using accelerometer on finger side

et al. 2017

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In this study, we set out to develop a method for estimating the fine and fast shear deformation of a finger pad, that is, the palm side of a fingertip, as it scans the surface of a material. Using a miniature accelerometer, we measured the acceleration at the radial skin, the deformation of which is accompanied by the shear deformation of the finger pad. Using a transfer function, as specified in a separate experiment, between the pad and side of a finger, we estimated the shear deformation of the finger pad in the frequency domain. A comparison between an estimate based on the accelerometer and another based on a precise force sensor for the tangential component of the interaction force between the fingertip and material surfaces showed that the estimation accuracy was sufficient for frequencies in excess of approximately 20-50 Hz and for skin deformation above 10 −6 m. Our technique merely requires that an accelerometer be attached to the side of the fingertip, which allows active texture exploration. These estimates or measurements of the finger skin deformation caused by touching materials will help us to comprehend the relationships between material surfaces and the resulting texture sensations.

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A Tactile Computer Mouse for the Display of Surface Material Properties

Strese

Hassen

Noll

et al. 2019

IEEE Trans. Haptics

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We present a novel input/output device to display the tactile properties of surface materials. The proposed Tactile Computer Mouse (TCM) is equipped with a series of actuators that can create perceptually relevant tactile cues to a user. The display capabilities of our TCM match the major tactile dimensions in human surface material perception, namely, hardness, friction, warmth, microscopic roughness, and macroscopic roughness. The TCM also preserves necessary interaction capabilities of a typical computer mouse. In addition to the TCM design, we introduce data acquisition procedures and concepts that are necessary to derive a parametric representation of a surface material and further demonstrate the corresponding rendering approach on the TCM. We conducted subjective experiments to determine tactile property ratings of real materials, perceived property ratings using the TCM, and how precisely subjects match the real materials to corresponding virtual material representations using the TCM in the absence of visual and audible clues. Our experimental results show that our TCM successfully displays the five fundamental tactile dimensions and that the twenty participants were able to perceive the TCM-produced virtual surface material tactile sensations with a recognition rate of 89.6% for ten different materials.

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Wearable Finger Pad Sensor for Tactile Textures Using Propagated Deformation on a Side of a Finger: Assessment of Accuracy

Cited by 4 publications

References 18 publications

Measurement System for Finger Skin Displacement on a Textured Surface Using Index Matching

Measurement System for Finger Skin Displacement on a Textured Surface Using Index Matching

Wearable finger pad deformation sensor for tactile textures in frequency domain by using accelerometer on finger side

A Tactile Computer Mouse for the Display of Surface Material Properties

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