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Integrating Conductive Threads into Different Knitting Construction by Flat Knitting Machine to Create Stretch Sensitive Fabrics for Breathing MonitoringQureshi, Waqas January 2011 (has links)
During the last decade medical applications of textile sensors have been growing rapidly and textile sensors are the focal research point for many sensor projects. Textile sensors are still not available as a mainstream product to replace conventional electric sensors and electrodes. Textile sensors can be integrated in a textile garment to measure vital signs of a human being. In this regard stretch sensors are able to measure breathing rate of a person. In this project we use seamless knitting technique to make stretch sensors using conductive fibers. The resistance difference between stretching and relaxing of these sensors gives a pattern for human breathing. Four knitting structures with different conductive fibers are made and tested with cyclic tester to construct a graph between resistance and time to find the knitting structure which gives the best results. Tests are also done to check the results after washing. These sensors can be used in breathing monitoring of patients during daily life. / Program: Master Programme in Textile Technology
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Integrating Conductive Threads into Different Knitting Construction by Flat Knitting Machine to Create Stretch Sensitive Fabrics for Breathing MonitoringQURESHI, WAQAS January 2013 (has links)
During the last decade medical applications of textile sensors have been growing rapidly and textile sensors are the focal research point for many sensor projects. Textile sensors are still not available as a mainstream product to replace conventional electric sensors and electrodes. Textile sensors can be integrated in a textile garment to measure vital signs of a human being. In this regard stretch sensors are able to measure breathing rate of a person. In this project we use seamless knitting technique to make stretch sensors using conductive fibers. The resistance difference between stretching and relaxing of these sensors gives a pattern for human breathing. Four knitting structures with different conductive fibers are made and tested with cyclic tester to construct a graph between resistance and time to find the knitting structure which gives the best results. Tests are also done to check the results after washing. These sensors can be used in breathing monitoring of patients during daily life. / Program: Master programme in Textile Technology
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Inclusion of Fabric Properties in the Design of Electronic TextilesQuirk, Meghan M. 21 January 2010 (has links)
This thesis considers the impact of fabric properties on the electronic textile (e-textile) design process. Specifically, properties such as weave pattern, drape, tinsel wire placement and weight are evaluated as physical aspects of an e-textile system within an expanded design flow and fabric synthesis. A textile's physical properties are important for creating e-textiles that look and feel like normal clothing and thus are truly wearable. A more detailed assessment of the weave of an e-textile and its effect on the electrical resistance of networks of uninsulated conductive fibers is also considered in both single weaves and complex pocket double weaves. / Master of Science
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Möjligheten att integrera elektronik i textil : Möjliggörande av elektroniska applikationer i arbetskläderGörrel, Elina, Hjelm, Alva January 2021 (has links)
Husqvarna är ett företag som bland annat tillverkar skyddskläder avsedda för arbete i skogen. På uppdrag av Husqvarna skall möjligheten att integrera elektronik i skyddskläder undersökas, vilket ligger till grund för följande arbete. Genom en litteraturstudie har möjliga tekniker studerats. Baserat på det faktum att skyddskläder oftast är vävda valdes vävning som teknik. Olika typer av ledande material i form av garner undersöktes genom att resistansen hos dessa uppmättes. Därefter gjordes ett urval utav de konduktiva materialen där de med lägst resistans togs vidare för testning och prototypframtagning. Prover med kanaler som det konduktiva materialet lades in i vävdes fram. Dessutom laminerades vissa provkroppar som innehöll icke-isolerat konduktivt garn. Lamineringens syfte var att isolera det ledande garnet och därmed skydda arbetaren från stötar och systemet från att kortslutas. Det utfördes sedan tester på de tillverkade provkropparna som undersökte tåligheten mot tvätt och svett. Tvättestet gjordes i enlighet med SS- EN ISO 6330:2012 och för svettestet konstruerades en egen metod eftersom det i nuläget inte finns en standard som involverar svettlösning och konduktiva material i textil. Efter tvättestet visade det sig att det laminat som användes inte är att rekommendera då det lossnade på majoriteten av provkropparna. Däremot påverkades inte resistansen i garnen nämnvärt av tvättningen. Det resultat som erhölls av svettestet visade på att laminatet bidrog till att ingen kontakt mellan de ledande banorna uppstod. Laminatet är trots det inte att föredra på grund av dess påverkan i tvättestet. Utöver det var det endast de prov som innehöll endast FISK-kabel som klarade sig från att få kontakt mellan de ledande banorna. Då elektronik och textil inte vanligtvis används tillsammans är möjligheten att separera de olika systemen vid återvinning av plagget nödvändig. Ur miljösynpunkt är det därför fördelaktigt att integrera elektroniken så lite som möjligt, eftersom den då blir lättare att separera från tyget. Dessutom möjliggör det för eventuella reparationer av de olika komponenterna, vilket i sin tur kan förlänga hela produktens livslängd. För komfortens och säkerhetens skull måste dock elektroniken och ledningsbanorna integreras betydligt mer. Det bästa alternativet för att integrera elektronik i ett plagg för det här ändamålet är antagligen att placera ledningsbanorna i förslagsvis ett fodertyg. Rekommendationen är en tunn isolerad kabel som läggs i kanaler i tyget. Eftersom den här studien gjorts som en undersökning till om det skulle vara möjligt att integrera elektronik i skyddskläder krävs vidare produktutveckling och designarbete för att ett skyddsplagg med smarta funktioner ska bli verklighet. / Husqvarna is a company that manufactures workwear intended for work in the forest. On behalf of Husqvarna, the possibility of integrating electronics into workwear will be investigated, which is the basis for this work. Through a literature study possible techniques have been studied. Due to the fact that workwear usually is of woven structure, weaving was chosen as the technique. Different types of conductive materials were examined by measuring the electrical resistance. A selection was made of the conductive materials with the lowest resistance for further testing and prototype development. Specimens were woven with canals, into which the conductive material was inserted. In addition, specimens containing non-insulated conductive yarn were laminated. The purpose of the lamination was to insulate the conductive yarn and thereby protect the worker from electrical shocks and cause a short curcuit. Tests were then performed on the manufactured specimens which examined the resistance to washing and sweat. The washing test was done on the basis of SS-EN ISO 6330: 2012 and for the sweat test an own method was constructed, because there is currently no standard that involves sweat and conductive materials in textiles. After washing tests it turned out that the laminate is not to recommend as it came loose on the majority of the specimens. However, the electrical resistance was not significantly affected by the washing. The results obtained from the sweat test showed that the laminate prevented contact between the conductive lines. Nevertheless, the laminate is not to be preferred in this case due to how it was affected in the washing test. In addition, only those specimens that contained only FISK-cable managed to not create contact between the conductive paths. As electronics and textiles are not usually used together, the possibility of separating the different systems when recycling the garment is necessary. From an environmental point of view, it is therefore advantageous to integrate the electronics as little as possible, as it will then be easier to separate from the fabric. In addition, it allows for possible repairs of the various components, which can extend the life of the entire product. For the sake of comfort, however, the electronics and wiring must be integrated much more. The best option for integrating electronics into a garment for this purpose is probably to place the conduits in a lining fabric with a thin insulated cable lying in canals in the fabric. This study´s purpose was to determine whether it would be possible to integrate electronics into workwear, further product development and designwork is neccessary in order to create garments with smart features.
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