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Lund, Anja
Publications (10 of 30) Show all publications
Syrén, F., Li, C., Billing, E., Lund, A. & Nierstrasz, V. (2016). Characterization of textile resistive strain sensors. In: : . Paper presented at 16th World Textile Conference AUTEX 2016, Ljubljana, June 8-10, 2016.
Open this publication in new window or tab >>Characterization of textile resistive strain sensors
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2016 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
resistive sensor, textile, characterization, resolution, hysteresis, dynamic/linear range
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-10031 (URN)
Conference
16th World Textile Conference AUTEX 2016, Ljubljana, June 8-10, 2016
Projects
Bärbara sensorer i smarta textilierStrategiskt samarbete Borås-Skövde
Funder
Swedish Foundation for Strategic Research Region Västra Götaland, RUN 612-0197-13
Available from: 2016-06-21 Created: 2016-06-16 Last updated: 2017-05-02Bibliographically approved
Rundqvist, K., Hernandez, N., Syrén, F., Lund, A. & Nierstrasz, V. (2016). Optimising position and pressure of wearable textile sensors to reduce motion artifacts. In: : . Paper presented at Printed electronics, Berlin, 2016.
Open this publication in new window or tab >>Optimising position and pressure of wearable textile sensors to reduce motion artifacts
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2016 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Natural Sciences
Identifiers
urn:nbn:se:hb:diva-11459 (URN)
Conference
Printed electronics, Berlin, 2016
Available from: 2016-12-14 Created: 2016-12-14 Last updated: 2017-05-04Bibliographically approved
Rundqvist, K., Hernández, N., Syrén, F., Lund, A. & Nierstrasz, V. (2016). The Challanges of Textile Sensors in Comfortable Wearable Health Monitoring Systems. In: : . Paper presented at 16th World Textile Conference AUTEX, Ljubljana, June 8-10, 2016.
Open this publication in new window or tab >>The Challanges of Textile Sensors in Comfortable Wearable Health Monitoring Systems
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2016 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-10033 (URN)
Conference
16th World Textile Conference AUTEX, Ljubljana, June 8-10, 2016
Funder
Swedish Foundation for Strategic Research
Available from: 2016-06-16 Created: 2016-06-16 Last updated: 2017-05-04Bibliographically approved
Lund, A., Bazooyar, F., Wand, C. & Bolton, K. (2015). Inducing piezoelectric beta-phase in PVDF for fibre- and printed sensors. In: : . Paper presented at European Materials Research Society, 2015 Spring Meeting, Lille, France.
Open this publication in new window or tab >>Inducing piezoelectric beta-phase in PVDF for fibre- and printed sensors
2015 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-4069 (URN)
Conference
European Materials Research Society, 2015 Spring Meeting, Lille, France
Available from: 2015-12-15 Created: 2015-12-15 Last updated: 2018-04-28Bibliographically approved
Li, C., Bredies, K., Lund, A., Nierstrasz, V., Hemeren, P. & Högberg, D. (2015). kNN based Numerical Hand Posture Recognition using a Smart Textile Glove. In: Maarten Weyn (Ed.), Ambient 2015: The Fifth International Conference on Ambient Computing, Applications, Services and Technologies. Paper presented at The Fifth International Conference on Ambient Computing, Applications, Services and Technologies, Nice, July 19-24, 2015. (pp. 36-41).
Open this publication in new window or tab >>kNN based Numerical Hand Posture Recognition using a Smart Textile Glove
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2015 (English)In: Ambient 2015: The Fifth International Conference on Ambient Computing, Applications, Services and Technologies / [ed] Maarten Weyn, 2015, p. 36-41Conference paper, Published paper (Refereed)
Series
Ambient, ISSN 2326-9324 ; 5
National Category
Textile, Rubber and Polymeric Materials Communication Systems
Identifiers
urn:nbn:se:hb:diva-4067 (URN)978-1-61208-421-3 (ISBN)
Conference
The Fifth International Conference on Ambient Computing, Applications, Services and Technologies, Nice, July 19-24, 2015.
Available from: 2015-12-15 Created: 2015-12-15 Last updated: 2018-03-27Bibliographically approved
Lund, A., Melvinsson, R., Malm, V., Wand, C., Tahir, M. W., Skrifvars, M., . . . Nierstrasz, V. (2015). Melt Spun PVDF Actuator Fibres: the Effect of Spin-Line Orientation and MW on Actuation. In: Regional Conference Polymer Processing Society Graz 2015: Book of Abstracts. Paper presented at Polymer Processing Society Regional Conference, Graz, September 21-25, 2015. (pp. 306).
Open this publication in new window or tab >>Melt Spun PVDF Actuator Fibres: the Effect of Spin-Line Orientation and MW on Actuation
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2015 (English)In: Regional Conference Polymer Processing Society Graz 2015: Book of Abstracts, 2015, p. 306-Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

This paper presents the melt spinning and characterisation of polymer actuator fibres; fibres that reversibly contract along the fibre axis in response to heat. Recently, Haines et al (1) showed that low-cost filaments, e.g. fishing lines, can be relevant precursors for artificial muscles. They demonstrated a reversible fibre-direction thermal contraction, which was significantly amplified when the fibres were twisted and coiled. The effect was explained to result from an increase in the conformational entropy of the amorphous phase. In earlier studies on negative thermal expansion in anisotropic polymer structures, it has been shown that the negative thermal expansion in oriented highly crystalline polymers approaches values typical of polymer crystals (2).

 

To further investigate the mechanisms behind these seemingly simple artificial muscles, we have melt spun fibres from poly(vinylidene fluoride) (PVDF) – Solef  1006 and 1008 kindly provided by Solvay (Milan, Italy) – and compared their properties to a commercially available PVDF-fishing line. The fibres were characterised with respect to their thermal actuation properties, crystal morphology and degree of orientation along the spin-line axis.

 

We have further done modelling on the molecular and macroscopic levels examining the possible mechanisms of negative thermal expansion in semi-crystalline PVDF. We believe that tie molecules (a polymer chain linking two crystalline regions) are the predominant factor influencing actuation. Two mechanisms are considered: an entropic effect and a conformational change effect. The entropic effect causes an increase in the elastic stiffness with an increase in temperature, effectively resulting in a contraction of a strained fibre. The conformational change effect is also expected to contribute to contraction as tie molecules, under strain, revert to their unloaded preferred conformation when heated.

  1. C. S. Haines et al., Artificial Muscles from Fishing Line and Sewing Thread. Science 343, 868-872 (2014).
  2. C. L. Choy et al., Negative Thermal Expansion in Oriented Crystalline Polymers. Journal of Polymer Science: Polymer Physics Edition 19, 335-352 (1981).
Keywords
Smart Textiles, Actuator, Robot, Polymer
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-857 (URN)
Conference
Polymer Processing Society Regional Conference, Graz, September 21-25, 2015.
Projects
Strategiskt samarbete Borås-Skövde
Available from: 2015-10-05 Created: 2015-10-05 Last updated: 2018-03-21Bibliographically approved
Åkerfeldt, M., Lund, A. & Walkenström, P. (2015). Textile sensing glove with piezoelectric PVDF fibers and printed electrodes of PEDOT:PSS. Textile research journal, 85(17), 1789-1799
Open this publication in new window or tab >>Textile sensing glove with piezoelectric PVDF fibers and printed electrodes of PEDOT:PSS
2015 (English)In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748, Vol. 85, no 17, p. 1789-1799Article in journal (Refereed) Published
Keywords
textile sensor, smart textile
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-4065 (URN)10.1177/0040517515578333 (DOI)000361487600003 ()2-s2.0-84941924200 (Scopus ID)
Available from: 2015-12-15 Created: 2015-12-15 Last updated: 2018-12-01Bibliographically approved
Rundqvist, K., Hernández, N., Syrén, F., Lund, A. & Nierstrasz, V. (2015). Textile sensor for human motion detection in healthcare applications. In: : . Paper presented at 9. Aachen-Dresden International Textile Conference 2015.
Open this publication in new window or tab >>Textile sensor for human motion detection in healthcare applications
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2015 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Textile sensor for human motion detection in healthcare applications This project aims to develop a wearable and comfortable sensor system useful for continuous monitoring of symptoms of epilepsy and Parkinson´s disease, and progress during rehabilitation after a stroke. The system is to monitor both physiological electrical signals and movement, providing an objective assessment tool for hospital personnel monitoring the wearer’s progress. This gives a possibility to improve diagnosis, monitor disease progression or improvement and tailor treatments. By integrating the wearable sensors into a garment, preferably into the fabric itself, we aim to develop a functional demonstrator that is comfortable enough to be accepted by the patients for daily use. [1] The use of textile sensors in healthcare applications is one step closer to a more comfortable wearable sensor system for continuous measurements. For heart rate detection textile based electrodes in garments have been investigated. e.g. [2] Our current focus is on developing textile sensors for human motion detection, connected to the specific motions regarding the neurological disorders. One approach is to integrate electromechanical properties in the textile structure, creating strain sensitive structures which give an electrical output when stretched mechanically due to movement. When investigating a suitable textile construction developing textile sensors often takes a trial and error approach, which is time consuming. In a recent study[3] we showed that the textile construction influenced the performance of a textile sensor. The study pointed to a need of a more controlled developing method, such as computer simulation, to make more accurate predictions of the sensors performance. By investigating the possibility to combine existing computer simulation programmes, such as Comsol Multiphysics and TexGen, for an assessment of the behaviour and performance of the electromechanical properties of textile structures a new design method for smart textile sensors could be achieved. In an ongoing interdisciplinary research project, wearITmed, partners from healthcare, electronics and textiles development (Sahlgrenska Academy, Acreo ICT, The Swedish School of Textiles, Swerea IVF

National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-3346 (URN)
Conference
9. Aachen-Dresden International Textile Conference 2015
Funder
Swedish Foundation for Strategic Research
Available from: 2015-11-30 Created: 2015-11-30 Last updated: 2016-03-04Bibliographically approved
Vahlberg, A., Lund, A., Bergström, M., Park, P.-O., Nilsson, E. & Hagström, B. (2014). A textile sensor using piezoelectric fibres to measure dynamic compression in a bowel stent. Paper presented at 16th Nordic-Baltic conference on biomedical engineering and medical physics & 10th Medicinteknikdagarna, 14-16 October 2014, Gothenburg, Sweden. Paper presented at 16th Nordic-Baltic conference on biomedical engineering and medical physics & 10th Medicinteknikdagarna, 14-16 October 2014, Gothenburg, Sweden.
Open this publication in new window or tab >>A textile sensor using piezoelectric fibres to measure dynamic compression in a bowel stent
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2014 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
Smart textiles, Textile electronics, Textile sensors
National Category
Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-7329 (URN)2320/14641 (Local ID)2320/14641 (Archive number)2320/14641 (OAI)
Conference
16th Nordic-Baltic conference on biomedical engineering and medical physics & 10th Medicinteknikdagarna, 14-16 October 2014, Gothenburg, Sweden
Available from: 2015-12-22 Created: 2015-12-22
Sandsjö, L., Rundqvist, K., Lund, A. & Persson, N.-K. (2014). Monitoring of Forefoot-Rearfoot Running Using a Piezoelectric Sock. Paper presented at Materials for Tomorrow/Sports Technology, 4-6 November, 2014, Gothenburg, Sweden. Paper presented at Materials for Tomorrow/Sports Technology, 4-6 November, 2014, Gothenburg, Sweden. Chalmers University of Technology
Open this publication in new window or tab >>Monitoring of Forefoot-Rearfoot Running Using a Piezoelectric Sock
2014 (English)Conference paper, Poster (with or without abstract) (Other academic)
Place, publisher, year, edition, pages
Chalmers University of Technology, 2014
Keywords
Smart Textiles
National Category
Materials Chemistry Production Engineering, Human Work Science and Ergonomics
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-7327 (URN)2320/14590 (Local ID)2320/14590 (Archive number)2320/14590 (OAI)
Conference
Materials for Tomorrow/Sports Technology, 4-6 November, 2014, Gothenburg, Sweden
Available from: 2015-12-22 Created: 2015-12-22
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