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Publications (10 of 96) Show all publications
Malm, V., Seoane, F. & Nierstrasz, V. (2019). Characterisation of Electrical and Stiffness Properties of Conductive Textile Coatings with Metal Flake-shaped Fillers. Materials, 12(21), 1-18
Open this publication in new window or tab >>Characterisation of Electrical and Stiffness Properties of Conductive Textile Coatings with Metal Flake-shaped Fillers
2019 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, no 21, p. 1-18Article in journal (Refereed) Submitted
Abstract [en]

Two conductive formulations containing different types of micron-sized metal flakes (silver-coated copper (Cu) and pure silver (Ag)) were characterised and used to form highly electrically conductive coatings (conductors) on plain and base-coated woven fabrics, the latter in an encapsulated construction. With e-textiles as the intended application, the fabric stiffness, in terms of flexural stiffness and sheet resistance (Rsh), after durability testing (laundering and abrasion) was investigated and related to user friendliness and long-term performance. Bare and encapsulated conductors with increasing amounts of deposited solids were fabricated by adjusting the knife coating parameters, such as the coating gap height (5, 20, 50, and 200 μm), which reduced the Rsh, as determined by four-point probe (4PP) measurements; however, this improvement was at the expense of increased flexural stiffness of the coated fabrics. The addition of a melamine derivative (MF) as a cross-linker to the Cu formulation and the encapsulation of both conductor types gave the best trade-off between durability and Rsh, as confirmed by 4PP measurements. However, the infrared camera images revealed the formation of hotspots within the bare conductor matrix, although low resistances (determined by 4PP) and no microstructural defects (determined by SEM) were detected. These results stress the importance of thorough investigation to assure the design of reliable conductors applied on textiles requiring this type of maintenance.

Keywords
Conductivity, metal flake, coating, textile, coating parameters, encapsulation, fabric stiffness, durability
National Category
Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-13942 (URN)10.3390/ma12213537 (DOI)000502798800078 ()2-s2.0-85074669865 (Scopus ID)
Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2020-01-29
Malm, V., Nierstrasz, V. & Seoane, F. (2018). Electrical resistance characterisations and durability of textile coatings containing metal flake fillers. In: : . Paper presented at 57th Dornbirn Global Fiber Congress, Dornbirn Austria, September 12–14, 2018.
Open this publication in new window or tab >>Electrical resistance characterisations and durability of textile coatings containing metal flake fillers
2018 (English)Conference paper, Oral presentation only (Refereed)
National Category
Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15188 (URN)
Conference
57th Dornbirn Global Fiber Congress, Dornbirn Austria, September 12–14, 2018
Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-11-20Bibliographically approved
Malm, V., Seoane, F. & Nierstrasz, V. (2018). Fused deposition modelling – Towards 3D printed electrodes on fabric for surface electromyography (sEMG). In: : . Paper presented at IDTechEx, Berlin, 11-12 April, 2018..
Open this publication in new window or tab >>Fused deposition modelling – Towards 3D printed electrodes on fabric for surface electromyography (sEMG)
2018 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Surface electromyography (sEMG) monitoring has promising applications within the field of human robot communication where wearable electrodes are used as the interface. This research investigates the production of flexible 3D printed electrodes using electrically conductive filaments, of thermoplastic polyurethane containing carbon black, and polyester fabric as substrate. Dry 3D printed electrodes of varying thickness, due to increased number of layers, were compared to conventional electrolytic gel electrodes. Initial tests show that the volume resistivity of 3D printed electrodes increased with increased number of layers. This because, with increased number of layers the diffusion between layers deteriorates and hinders conductive particle connections. Additional heat-treatments using hot press plates to improve diffusion between layers were promising as volume resistivity decreased with 200 % for all samples. As a first step to evaluate the 3D printed electrodes, skin-electrode impedance measurements were performed, and compared with measurements of conventional electrodes. Results showed that resistance and reactance versus frequency curves had similar trending slopes, decreasing with increasing frequency. However, this corresponded only between the thinnest (200 μm) 3D-printed dry electrode having a volume resistivity of 6.2 Ω cm and the conventional gel electrode. Future studies regarding the influence of platform and extruder temperature are planned for, focusing on improved diffusion between layers and increased conduction for proper electron transfer. 

Keywords
3D printing, electrodes, conductive filament, fabric, diffusion, printing parameters, surface electromyography
National Category
Textile, Rubber and Polymeric Materials Composite Science and Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15187 (URN)
Conference
IDTechEx, Berlin, 11-12 April, 2018.
Funder
Region Västra Götaland, 2016-01342
Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-11-20Bibliographically approved
Abtahi, F., Anund, A., Fors, C., Seoane, F. & Lindecrantz, K. (2017). Association of Drivers’ sleepiness with heart rate variability. A Pilot Study with Drivers on Real Road. In: : . Paper presented at European Medical and Biological Engineering Confernce Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, EMBEC2017 (pp. 149-152). Springer, Singapore
Open this publication in new window or tab >>Association of Drivers’ sleepiness with heart rate variability. A Pilot Study with Drivers on Real Road
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2017 (English)Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Springer, Singapore, 2017
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Other Medical Engineering
Identifiers
urn:nbn:se:hb:diva-13764 (URN)
Conference
European Medical and Biological Engineering Confernce Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, EMBEC2017
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-03-20Bibliographically approved
Jiong, S., Billing, E., Seoane, F., Zhou, B., Högberg, D. & Hemeren, P. (2017). Categories of touch: Classifying human touch using a soft tactile sensor. In: The robotic sense of touch: From sensing to understanding, workshop at the IEEE International Conference on Robotics and Automation (ICRA), 29 May, Singapore.: . Paper presented at IEEE International Conference on Robotics and Automation (ICRA), Singapore, 29 May, 2017..
Open this publication in new window or tab >>Categories of touch: Classifying human touch using a soft tactile sensor
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2017 (English)In: The robotic sense of touch: From sensing to understanding, workshop at the IEEE International Conference on Robotics and Automation (ICRA), 29 May, Singapore., 2017Conference paper, Oral presentation with published abstract (Refereed)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-13766 (URN)
Conference
IEEE International Conference on Robotics and Automation (ICRA), Singapore, 29 May, 2017.
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-04-03Bibliographically approved
Seoane, F. & Atefi, S. R. (2017). Electrical bioimpedance enabling prompt intervention in traumatic brain injury. In: SPIE Micro-and Nanotechnology Sensors, Systems, and Applications IX: . Paper presented at SPIE Defense + Commercial Sensing 2017, Annaheim, April 9-13, 2017.
Open this publication in new window or tab >>Electrical bioimpedance enabling prompt intervention in traumatic brain injury
2017 (English)In: SPIE Micro-and Nanotechnology Sensors, Systems, and Applications IX, 2017Conference paper, Published paper (Refereed)
National Category
Medical Equipment Engineering
Identifiers
urn:nbn:se:hb:diva-13763 (URN)10.1117/12.2263672 (DOI)000411756000016 ()2-s2.0-85024393605 (Scopus ID)
Conference
SPIE Defense + Commercial Sensing 2017, Annaheim, April 9-13, 2017
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-12-07Bibliographically approved
Hafid, A., Benouar, S., Kedir-Talha, M., Abtahi, F., Attari, M. & Seoane, F. (2017). Full Impedance Cardiography measurement device using Raspberry PI3 and System-on-Chip biomedical Instrumentation Solutions. IEEE journal of biomedical and health informatics
Open this publication in new window or tab >>Full Impedance Cardiography measurement device using Raspberry PI3 and System-on-Chip biomedical Instrumentation Solutions
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2017 (English)In: IEEE journal of biomedical and health informatics, ISSN 2168-2194, E-ISSN 2168-2208Article in journal (Refereed) Published
Abstract [en]

Impedance Cardiography (ICG) is a non-invasive method for monitoring cardiac dynamics using Electrical Bioimpedance (EBI) measurements. Since its appearance more than 40 years ago, ICG has been used for assessing hemodynamic parameters. This paper present a measurement system based on two System on Chip (SoC) solutions and Raspberry PI, implementing both a full 3-lead ECG recorder and an impedance cardiographer, for educational and research development purposes. Raspberry PI is a platform supporting Do-It-Yourself project and education applications across the world. The development is part of Biosignal PI, an open hardware platform focusing in quick prototyping of physiological measurement instrumentation. The SoC used for sensing cardiac biopotential is the ADAS1000, and for the EBI measurement is the AD5933. The recording were wirelessly transmitted through Bluetooth to a PC, where the waveforms were displayed, and hemodynamic parameters such as heart rate, stroke volume, ejection time and cardiac output were extracted from the ICG and ECG recordings. These results show how Raspberry PI can be used for quick prototyping using relatively widely available and affordable components, for supporting developers in research and engineering education. The design and development documents, will be available on www.BiosignalPI.com, for open access under a Non Commercial-Share A like 4.0 International License.

Place, publisher, year, edition, pages
IEEE, 2017
National Category
Medical Engineering
Identifiers
urn:nbn:se:hb:diva-13769 (URN)10.1109/JBHI.2017.2783949 (DOI)000447833100019 ()29990025 (PubMedID)2-s2.0-85038859857 (Scopus ID)
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-12-07Bibliographically approved
Vega-Barbas, M., Pau, I., Augusto, J. C. & Seoane, F. (2017). Interaction patterns for smart spaces. A confident interaction design solution for pervasive sensitive IoT services. IEEE Access
Open this publication in new window or tab >>Interaction patterns for smart spaces. A confident interaction design solution for pervasive sensitive IoT services
2017 (English)In: IEEE Access, E-ISSN 2169-3536Article in journal (Refereed) Published
Place, publisher, year, edition, pages
IEEE, 2017
National Category
Computer Systems Medical Equipment Engineering Human Computer Interaction
Identifiers
urn:nbn:se:hb:diva-13767 (URN)10.1109/ACCESS.2017.2777999 (DOI)000425679700010 ()2-s2.0-85035770904 (Scopus ID)
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-12-21Bibliographically approved
Cheng, J., Zhou, B., Lukowicz, P., Seoane, F., Varga, M., Mehmann, A., . . . Amft, O. (2017). Textile Building Blocks:Toward Simple, Modularized, and Standardized Smart Textile. In: Smart Textiles: Fundamentals, Design, and Interaction (pp. 303-331). Springer, Cham
Open this publication in new window or tab >>Textile Building Blocks:Toward Simple, Modularized, and Standardized Smart Textile
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2017 (English)In: Smart Textiles: Fundamentals, Design, and Interaction, Springer, Cham , 2017, p. 303-331Chapter in book (Refereed)
Abstract [en]

Textiles are pervasive in our life, covering human body and objects, as well as serving in industrial applications. In its everyday use of individuals, smart textile becomes a promising medium for monitoring, information retrieval, and interaction. While there are many applications in sport, health care, and industry, the state-of-the-art smart textile is still found only in niche markets. To gain mass-market capabilities, we see the necessity of generalizing and modularizing smart textile production and application development, which on the one end lowers the production cost and on the other end enables easy deployment. In this chapter, we demonstrate our initial effort in modularization. By devising types of universal sensing fabrics for conductive and non-conductive patches, smart textile construction from basic, reusable components can be made. Using the fabric blocks, we present four types of sensing modalities, including resistive pressure, capacitive, bioimpedance, and biopotential. In addition, we present a multi-channel textile–electronics interface and various applications built on the top of the basic building blocks by ‘cut and sew’ principle.

Place, publisher, year, edition, pages
Springer, Cham, 2017
Series
Human Computer-Interaction, ISSN 1571-5035
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-13762 (URN)10.1007/978-3-319-50124-6_14 (DOI)978-3-319-50123-9 (ISBN)978-3-319-50124-6 (ISBN)
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-03-20Bibliographically approved
Zhou, B., Altamirano, C. A., Zurian, H. C., Atefi, S. R., Billing, E., Seoane, F. & Lukowicz, P. (2017). Textile Pressure Mapping Sensor for Emotional Touch Detection in Human-Robot Interaction. Sensors, 17(11)
Open this publication in new window or tab >>Textile Pressure Mapping Sensor for Emotional Touch Detection in Human-Robot Interaction
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2017 (English)In: Sensors, Vol. 17, no 11Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Multidisciplinary Digital Publishing Institute, 2017
National Category
Medical Engineering Electrical Engineering, Electronic Engineering, Information Engineering Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-13768 (URN)10.3390/s17112585 (DOI)000416790500147 ()2-s2.0-85034032083 (Scopus ID)
Available from: 2018-03-03 Created: 2018-03-03 Last updated: 2018-12-01Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6995-967X

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