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Utvärdering av smarta kläder för användning inom arbetslivet
KTH, School of Technology and Health (STH).
KTH, School of Technology and Health (STH).
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Evaluation of smart clothes for use in working life (English)
Abstract [sv]

Syftet med projekt var att bidra till utvecklingen av smarta kläder. Två smarta tröjor jämfördes mot varandra. Den ena tröjan (Hexoskin-tröjan) var utvecklad av företaget Hexoskin och den andra tröjan (X-shirt) genom ett samarbete mellan KTH och Högskolan i Borås. Signalerna från de smarta tröjorna validerades mot etablerade mätmetoder insamlad med EKG och spirometer utvecklade av företaget ADInstruments. Korrelationen visade sig vara god för både X-shirt och Hexoskin-tröjan. En testperson vid god hälsa utförde sex simulerade arbetsmoment från olika yrkeskategorier. Detta för att testa ett koncept som skulle kunna användas till att utvärdera risker i arbetslivet. En mjukvara utvecklades för att analysera och visualisera resultaten baserat på aktuell puls och andningsfrekvens för de olika arbetsmomenten.

Resultatet visade att EKG-signalerna för båda smarta tröjorna var robusta mot rörelser. Andningssignalerna stördes dock vid rörelser. Dessutom berodde signalkvaliteten på textil-elektrodernas fuktighet. Båda smarta tröjorna behöver fuktas innan användning. Dock sker avdunstningen i lägre takt hos X-shirt vilket gör den mer lämplig för mätningar under lång tid vid låg fysisk aktivitet.

Hexoskin var mer robust än X-shirt då X-shirts elektroder ibland tappade sin hudkontakt. Ett sätt att utveckla X-shirt är att göra den mer flexibel för olika rörelser med hjälp av till exempel elastiska axelband och ett mer åtsittande bröstband för att elektroderna skall få bättre kontakt med huden.

Abstract [en]

The aim of this project was to contribute to the development of wearable technology. Two smart shirts were compared against each other. One of the shirts (Hexoskin-shirt) was developed by a company called Hexoskin. The other shirt (X-shirt) was developed by a collaboration by KTH and University of Borås. The smart shirts were first validated against established measurement procedures that were acquired with an ECG and a spirometer developed by the company ADInstruments. The pulse and breathing rate from both shirts correlated well with the "gold standard". A test person in apparent good health performed six simulated working tasks from different work categories. This was done to test a concept that could be used to evaluate risks in working life. Also, software was developed to analyze and visualize the workload based on heart rate and respiration rate.

The results showed that the ECG-signals from both shirts were robust against movement artifacts. On the other hand, the respiration signals were affected by movement artifacts. The quality of the signal depended on the wetness of the textile electrodes. Both smart shirts' electrodes needed to be wet before usage. Evaporation from the electrodes was limited for X-shirt due to a waterproof layer; therefore, X-shirt would be preferable for ergonomic evaluation that takes place during a long time with low physical activity.

Hexoskin-shirt proved to be more robust than X-shirt, as X-shirt’s electrodes lost good skin-contact at times. In order to make X-shirt even more suitable for measuring ergonomic parameters its chest strap could be made tighter and shoulder straps could be made more elastic. This could give the electrodes better contact with the body.

Place, publisher, year, edition, pages
2016. , 24 p.
Series
TRITA-STH, 2016:31
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-190137OAI: oai:DiVA.org:kth-190137DiVA: diva2:951687
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Supervisors
Examiners
Available from: 2016-08-10 Created: 2016-08-09 Last updated: 2016-08-10Bibliographically approved

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