1,721,862 research outputs found
Data set to support the conference paper "Investigating the mechanical failures at the bonded joints of screen-printed e-textile circuits"
No full textThe Dataset is supporting the article by Komolafe, Abiodun, and Russel Torah. 2022. "Investigating the Mechanical Failures at the Bonded Joints of Screen-Printed E-Textile Circuits" Engineering Proceedings 15, no. 1: 17. https://doi.org/10.3390/engproc2022015017
Dataset consists of Excel spreadsheets of data used to create the figures in the conference paper.
This work was funded by the WEARPLEX project with the grant agreement ID 825339 under the EU Horizon 2020 funding—ICT-02-2018: www.wearplex.soton.ac.uk (accessed on 22 April 2022).</span
Dataset for: Evaluating the effect of textile material and structure for printable and wearable e-textiles
No full textDataset to support article "Evaluating the effect of textile material and structure for printable and wearable e-textiles" Komolafe, A., Glanc-Gostkiewicz, M., Nunes Matos, H. & Torah, R., 12 May 2021, (2021) In: IEEE Sensors Journal.</span
Dataset for the paper: Reliable UHF Long-Range Textile-Integrated RFID Tag based on a Compact Flexible Antenna Filament
No full textData supports the paper: Wagih, M.; Wei, Y.; Komolafe, A.; Torah, R.; Beeby, S. Reliable UHF Long-Range Textile-Integrated RFID Tag Based on a Compact Flexible Antenna Filament. Sensors 2020, 20, 3435.</span
Dataset for: Effect of textile primer layer on screen printed conductors for e-textiles
No full textDataset to support article "Effect of textile primer layer on screen printed conductors for e-textiles" Komolafe, A., & Torah, R., 24 May 2021, (2021) In: IEEE FLEPS conference. The dataset consists of an excel file showing the experimental data for the figures in the paper: Fig. 4 A comparison of the surface roughness of fabrics and screenprinted polyurethane film; Fig. 6 Peak and base resistances of printed conductors in bending; Fig. 7 Electrical resistance measurements of printed conductors on fabric and PU-coated fabric; Fig. 8 Effect of PU film on the variation in the electrical resistance values of the conductors during bending; Fig. 9 Effect of PU film on the peak resistances of the conductor during bending and Fig. 10 Effect of PU film on the base resistance of the conductor after bending.</span
Dataset for: Modelling Reliable Electrical Conductors for E-Textile Circuits on Polyimide Filaments
Full text linkDataset supports: Komolafe, A., Torah, R., Tudor, M., & Beeby, S. (2020). Modelling reliable electrical conductors for e-textile circuits on polyamide filaments. In E-Textiles 2019: International Conference on the Challenges, Opportunities, Innovations and Applications in Electronic Textiles. Multidisciplinary Digital Publishing Institute (MDPI).</span
Dataset for Modelling and experimental validation of the effect of the elastic properties of fabrics on the durability of screen printed e-textiles
No full textDataset supports:
Komolafe, A., Torah, R. N., Tudor, J., & Beeby, S. P. (2018). Modelling and experimental validation of the effect of the elastic properties of fabrics on the durability of screen printed e-textiles. Smart Materials and Structures.
The effect of the differing elastic properties of fabrics on the durability of electronics integrated in or on the fabric is still largely unknown because fabric properties are not easily characterized. Using a mathematical model combining classical beam theory (CBT) and Pierce’s fabric cantilever test, this paper models the bending behaviour of a woven fabric and locates its neutral axis (NA) as a basis for developing more durable printed e-textiles.</span
Dataset for: Influence of textile structure on the wearability of printed e-textiles
No full textDataset supports: Komolafe, A., Nunes‐matos, H., Glanc-Gostkiewicz, M., & Torah, R. (2020). Influence of textile structure on the wearability of printed e-textiles.
To achieve durable printed circuits on textiles, it is necessary to print low-cost polymer films that interface the fabric with the printed circuit. The film smooths the surface of the fabric to enable the printing of thin and flexible conductive films on the fabric. When printed, the thickness of the polymer films can dominate the fabric and limit the flexibility of the printed e-textile. This paper investigates the reduction of the polymer film thickness for printed and wearable e-textiles by controlling the thread count of the fabric using different blends of polyester/silk/cotton fabrics. A 50 µm thick polyurethane interface layer with a surface roughness, Ra value of 1.7 µm is reported on a 100% plain weave polyester fabric. The PU thickness is 4 times less than the state of the art and shows more than 80 % reduction in the proportion of interface material to fabric thickness of the printed e-textile. This minimizes the impact of the printed film on the fabric.</span
Position independent wearable 6.78 MHz near-field radiative wireless power transfer using electrically-small embroidered textile coils
Full text linkCoupled wireless power transfer (WPT) has been widely used for near-field high-efficiency WPT applications. However, the efficiency of the WPT link is highly sensitive to separation and alignment, and is prone to over-coupling, making it unsuitable for mobile systems with unknown or loose coupling such as wearables. While ultra-high frequency (UHF) and microwave radiative WPT (0.3-3 GHz) enables meters-long separation between the transmitter and the receiver, free space propagation losses, and rectification inefficiencies, adversely limit the end-to-end efficiency of the WPT link. This work proposes radiative WPT, in the 6.78 MHz license-free band, based on resonant electrically small antennas fabricated using embroidered textile coils, tuned using L-matching networks. The proposed WPT system achieves a stable forward transmission of S21>–17 dB and S21>–28 dB, independent of coil, separation on the XZ and XY planes respectively, in a 27 m3 volume space. The presented approach demonstrates the highest WPT-link efficiency, and promises higher end-to-end efficiency, compared to UHF WPT
Modelling and experimental validation of the effect of the elastic properties of fabrics on the durability of screen printed e-textiles
No full textFabrics are stiff in tension but highly compliant in compression in the plane of the textile. The effect of these differing elastic properties on the durability of electronics integrated in or on the fabric is still largely unknown because fabric properties are not easily characterized. Using a mathematical model combining classical beam theory (CBT) and Pierce's fabric cantilever test, this paper models the bending behaviour of a woven fabric and locates its neutral axis (NA) as a basis for developing more durable printed e-textiles. The CBT model showed that the difference in the tensile and compressive moduli of a fabric reduces the bending resistance of the fabric and also moves its NA position away from the central axis on the fabric. Results obtained from a Pierce's bending test of four different textile blends of polyester, cotton and lycra indicate textiles can have anisotropic elastic moduli with different values in their warp and weft directions. This results in different NA positions that vary depending upon the direction of the bending forces. Empirical verification of these NAs was achieved by comparing the change in resistance of a set of screen printed piezoresistive strain gauges positioned on and away from the NA during positive and negative bending with a radius of 5 mm. The gauge positioned at a 1 % distance from the NA position showed approximately 0.3 % change in its electrical resistance in contrast to a 37 % change in its resistance when it was located at a 65 % distance away from the NA
Effect of textile primer layer on screen printed conductors for e-textiles
No full textThis paper reports the influence of screen printed polyurethane (PU) primer layer on the electrical behaviour of screen printed conductors. The PU layer smooths the surface of the textile to allow flexible conductors to be printed on it. By varying the thickness of the PU film, the change in the electrical resistance of the conductors during and after bending was examined. Results show that conductors on un-coated fabrics show greater hysteresis of up to 10% more than conductors on the PU coated fabrics. As the thickness of the PU film increases, the printed conductor experiences more stress and consequently a wider variation in its resistance change during bending
- …
