Finger pad friction and tactile perception of laser treated, stamped and cold rolled micro-structured stainless steel sheet surfaces

Zhang, Sheng; Zeng, Xiangqiong; Matthews, D.T.A.; Igartua, A.; Vidal, Eva Rodríguez; Fortes, Jana; Heide, Emile van der

doi:10.1007/s40544-017-0147-9

Cited by 24 publications

(9 citation statements)

References 42 publications

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“…Based on the above results, we can conclude that the Mach-Zehnder vibro-perception system possesses the characteristics of high sensitivity compared with OPLL vibro-perception system in the direct contact experiment. This high sensitivity is consistent with skin perception in light touch regime that is defined by force less than 1 N [ 38 ]. However, the Mach-Zehnder system has low susceptibility to beating interference for both tapping and sliding motions.…”

Section: Resultssupporting

confidence: 81%

Vibro-Perception of Optical Bio-Inspired Fiber-Skin

Zhang

et al. 2018

Sensors

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In this research, based on the principle of optical interferometry, the Mach-Zehnder and Optical Phase-locked Loop (OPLL) vibro-perception systems of bio-inspired fiber-skin are designed to mimic the tactile perception of human skin. The fiber-skin is made of the optical fiber embedded in the silicone elastomer. The optical fiber is an instinctive and alternative sensor for tactile perception with high sensitivity and reliability, also low cost and susceptibility to the magnetic interference. The silicone elastomer serves as a substrate with high flexibility and biocompatibility, and the optical fiber core serves as the vibro-perception sensor to detect physical motions like tapping and sliding. According to the experimental results, the designed optical fiber-skin demonstrates the ability to detect the physical motions like tapping and sliding in both the Mach-Zehnder and OPLL vibro-perception systems. For direct contact condition, the OPLL vibro-perception system shows better performance compared with the Mach-Zehnder vibro-perception system. However, the Mach-Zehnder vibro-perception system is preferable to the OPLL system in the indirect contact experiment. In summary, the fiber-skin is validated to have light touch character and excellent repeatability, which is highly-suitable for skin-mimic sensing.

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Section: Resultssupporting

confidence: 81%

Vibro-Perception of Optical Bio-Inspired Fiber-Skin

Zhang

et al. 2018

Sensors

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“…An important point in industrial design and manufacturing is pleasant touching. It has been reported that there is a correlation between tactile friction and the touch comfort level [36]. The results of the current study showed that the type of friction also affected brain dynamics and, consequently, the tactile friction perception.…”

Section: Discussionsupporting

confidence: 53%

Detection of static, dynamic, and no tactile friction based on nonlinear dynamics of EEG signals: A preliminary study

Baghdadi

Amiri

2021

Chaos, Solitons & Fractals

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Touching an object leads to a frictional interaction between the skin and the object. There are two kinds of friction: the first contact that leads to static friction and the dragging phase that leads to dynamic friction. No study has been performed to show the effect of friction type on EEG signals.The main goal of the current study is to investigate the effect of tactile friction on non-linear features of EEG signals.Participants performed a tactile task that each of its trials had three states: the sensation of 1) static friction, 2) dynamic friction, and 3) no friction. During the experiment, EEG signals were recorded, and different linear and non-linear EEG indices were extracted and analyzed to find the effect of the tactile friction on EEG signals.Linear features such as spectral features were not a good choice to distinguish between the states. However, non-linear features such as Lyapunov exponent, Higuchi's dimension, and Hurst exponent had the potential to separate the mentioned states. Results also showed signs of predictability (negative Lyapunov exponent) in the signals recorded during dynamic friction and the existence of long-range dependency (memory) in EEG signals recorded during all states. The complexity of the tactile system in Theta band was also higher than the Delta band.The results of this research not only increase our knowledge about brain non-linear dynamics in response to tactile friction but also lead to a design of a preliminary system that can automatically detect friction between the skin and surfaces.

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“…The tactile friction (also known as skin friction) can be influenced by factors such as material properties of skin, surface texture, resulting contact area, and normal load. These factors are well-formulated as a two-term friction model, which consists of the adhesive component and deformation component of skin friction, as follows [ 11 , 12 ]:

where

is the total friction force;

is the adhesive component of friction;

is the deformation component of friction;

is the interfacial shear strength;

is the real contact area;

is the viscoelastic loss fraction; δ is the indentation of the skin;

is the applied load; and a is the contact radius of the fingertip, which can be determined as follows:

where R is the radius of the fingertip; E* is the effective Young’s modulus;

and

are the Young’s moduli of the finger and counter-surface; and

and

are the Poisson’s ratios of the finger and counter-surface, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tactile Sliding Behavior of R2R Mass-Produced PLLA Nanosheet towards Biomedical Device in Skin Applications

2018

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In this research, sliding friction was measured between the fingertip and nanosheet on a silicon substrate under two conditions: dry and wet. By using a force transducer, the tactile friction force and applied load were measured. According to the experimental results, the relationship of friction force and applied load exhibits a positive correlation under both dry and wet conditions. In addition, the nanosheets are able to reduce the friction force and coefficient of friction (COF) compared to the reference sample, especially under the wet condition. Under the assumption of a full contact condition, the estimated contact area increases with larger applied loads. Furthermore, based on the wear observation, the skin sliding performance caused slight abrasions to the surface of the nanosheet samples with a mild wear track along the sliding direction. Overall, the sliding behavior between the skin and nanosheet was investigated in terms of friction force, COF, applied load, contact area, and wear. These findings can contribute to the nanosheet-related research towards biomedical devices in skin applications.

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Finger pad friction and tactile perception of laser treated, stamped and cold rolled micro-structured stainless steel sheet surfaces

Cited by 24 publications

References 42 publications

Vibro-Perception of Optical Bio-Inspired Fiber-Skin

Vibro-Perception of Optical Bio-Inspired Fiber-Skin

Detection of static, dynamic, and no tactile friction based on nonlinear dynamics of EEG signals: A preliminary study

Tactile Sliding Behavior of R2R Mass-Produced PLLA Nanosheet towards Biomedical Device in Skin Applications

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