Carbon nanotube composite for application in gait analysis

Gerlach, Carina; Lange, J.S.; Kanoun, Olfa

doi:10.1109/ssd.2012.6198102

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…According to the percolation theory 32 and general effective media theory 33,34 , the compressed nanocomposites increase the amount of conductive and percolating paths 35 . The volume resistance R v is defined as 36 :…”

Section: Materials and Methods Design Of The Sensor Arraymentioning

confidence: 99%

PDMS/MWCNT-based tactile sensor array with coplanar electrodes for crosstalk suppression

et al. 2016

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The severe crosstalk effect is widely present in tactile sensor arrays with a sandwich structure. Here we present a novel design for a resistive tactile sensor array with a coplanar electrode layer and isolated sensing elements, which were made from polydimethylsiloxane (PDMS) doped with multiwalled carbon nanotubes (MWCNTs) for crosstalk suppression. To optimize its properties, both mechanical and electrical properties of PDMS/MWCNT-sensing materials with different PDMS/MWCNT ratios were investigated. The experimental results demonstrate that a 4 wt% of MWCNTs to PDMS is optimal for the sensing materials. In addition, the pressure-sensitive layer consists of three microstructured layers (two aspectant PDMS/MWCNT-based films and one top PDMS-based film) that are bonded together. Because of this three-layer microstructure design, our proposed tactile sensor array shows sensitivity up to − 1.10 kPa − 1 , a response time of 29 ms and reliability in detecting tiny pressures.

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Section: Materials and Methods Design Of The Sensor Arraymentioning

confidence: 99%

PDMS/MWCNT-based tactile sensor array with coplanar electrodes for crosstalk suppression

et al. 2016

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“…In 2012 Gerlach et al [66] used a different approach, exploiting materials research to use a composite of multiwall carbon nanotube (CNT) and polydimethylsiloxane (PDMS) to make a single axis pressure sensor for plantar pressure measurement. This work was expanded in 2015 to a sensing matrix capable of tracking the pressure distribution across the entire plantar surface [43].…”

Section: A Resistive Sensorsmentioning

confidence: 99%

A Review of Wearable Sensor Systems to Monitor Plantar Loading in the Assessment of Diabetic Foot Ulcers

Wang

Jones

Chapman

et al. 2020

IEEE Trans. Biomed. Eng.

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Diabetes is highly prevalent throughout the world and imposes a high economic cost on countries at all income levels. Foot ulceration is one devastating consequence of diabetes, which can lead to amputation and mortality. Clinical assessment of diabetic foot ulcer (DFU) is currently subjective and limited, impeding effective diagnosis, treatment and prevention. Studies have shown that pressure and shear stress at the plantar surface of the foot plays an important role in the development of DFUs. Quantification of these could provide an improved means of assessment of the risk of developing DFUs. However, commerciallyavailable sensing technology can only measure plantar pressures, neglecting shear stresses and thus limiting their clinical utility. Research into new sensor systems which can measure both plantar pressure and shear stresses are thus critical. Our aim in this paper is to provide the reader with an overview of recent advances in plantar pressure and stress sensing and offer insights into future needs in this critical area of healthcare. Firstly, we use current clinical understanding as the basis to define requirements for wearable sensor systems capable of assessing DFU. Secondly, we review the fundamental sensing technologies employed in this field and investigate the capabilities of the resultant wearable systems, including both commercial and research-grade equipment. Finally, we discuss research trends, ongoing challenges and future opportunities for improved sensing technologies to monitor plantar loading in the diabetic foot.

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“…In resistive sensors, Wang et al explored the possibility of plantar pressure measurement by employing carbon coatings between tooth-shaped conversion layers [11]. Gerlach et al in their work, showed the implementation of Carbon Nanotubes (CNT) and Poly-di-methyl-siloxane (PDMS) for plantar pressure computation [12]. Resistive sensors are widely used for their low cost but, they suffer from EMI, low sensitivity, and repeatability.…”

Section: Introductionmentioning

confidence: 99%

Design of an enhanced spatial resolution indoor plantar strain and gait analysis setup for biomedical applications

Mishra,

Sahu,

Datta

2024

Eng. Res. Express

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In the recent years, measurement of plantar strain and gait analysis has gained huge attention and plays a pivotal role in monitoring posture related ailments or Diabetic Foot Ulcer (DFU). Fibre Bragg Grating Arrays (closely spaced FBGs), another category of optical sensors, are employed in this study to understand the strain and gait of human foot. These arrays offer critical advantages such as enhanced sensitivity, data acquisition, multiplexing abilities, and sensor location effect compensation. For experimentation, five arrays were distributed among different regions (Upper, Medial, and Heel) of foot and their strain patterns for six volunteers (three male and three female) were recorded for eighty seconds. The data was analysed in two ways, Combined (data of array sensors were averaged to target the whole area) and Individual (for independent analysis of each sensor in array). Incoherent transitions and strain patterns of FBGs within the same arrays observed in individual analysis, explains enhanced resolution capabilities of the arrays. Strain mapping of sensor behaviour also confirmed the identification of various forms of gait i.e., Heel Strike, Flat Foot, Heel Off, and Zero Contact. The average standard deviation values for the arrays was reported below 0.16.

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Carbon nanotube composite for application in gait analysis

Cited by 9 publications

References 7 publications

PDMS/MWCNT-based tactile sensor array with coplanar electrodes for crosstalk suppression

PDMS/MWCNT-based tactile sensor array with coplanar electrodes for crosstalk suppression

A Review of Wearable Sensor Systems to Monitor Plantar Loading in the Assessment of Diabetic Foot Ulcers

Design of an enhanced spatial resolution indoor plantar strain and gait analysis setup for biomedical applications

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