Pub Date : 2022-03-11DOI: 10.3390/engproc2022015007
Kevin Kiener, Aishwarya Anand, W. Fobelets, K. Fobelets
: Three-dimensional knitted helical coils are very sensitive inductive sensors that can be used to monitor breathing. Their inductance is high and the quality factor relatively low. A read-out circuit is designed and tested to track the inductance variations during circumference changes of a phantom chest. The challenge of the low-quality factors of the coil is resolved by designing a double cross-coupled FET pair with low capacitance. A digital counter records the frequency. A microprocessor samples the signal every 250 ms to minimize power consumption.
{"title":"Respiratory Inductive Plethysmography System for Knitted Helical Coils","authors":"Kevin Kiener, Aishwarya Anand, W. Fobelets, K. Fobelets","doi":"10.3390/engproc2022015007","DOIUrl":"https://doi.org/10.3390/engproc2022015007","url":null,"abstract":": Three-dimensional knitted helical coils are very sensitive inductive sensors that can be used to monitor breathing. Their inductance is high and the quality factor relatively low. A read-out circuit is designed and tested to track the inductance variations during circumference changes of a phantom chest. The challenge of the low-quality factors of the coil is resolved by designing a double cross-coupled FET pair with low capacitance. A digital counter records the frequency. A microprocessor samples the signal every 250 ms to minimize power consumption.","PeriodicalId":420270,"journal":{"name":"E-Textiles 2021","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130004290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-09DOI: 10.3390/engproc2022015004
H. Tahir, B. Malengier, G. B. Tseghai, L. Van Langenhove
: In this work, we introduced an embroidery-based stretchable (up to 60–70%) triboelectric nano-generator that could be attached to different parts of the human body such as fingers, knee, elbow, back, or shoulders, to sense the body movement. It can be used as activity recognition for health care and sport activity monitoring. The sensor was composed of different yarns embroidered on a stretchable conductive substrate, allowing it to sense diverse mechanical deformation of different body parts. Different stitching styles, patterns, stitch lengths, and shapes have been selected to cater to the unidirectional, bidirectional, and multidirectional force and obtain the maximum movement flexibility. In order to do embroidery on a stretchable substrate, a non-stretchable water-soluble second substrate has been added before embroidering, and is afterwards removed by application of steam. A sample of 1.5 × 6 cm 2 was used for sensing finger movement and generated a peak to peak voltage of 274.5 mV. The amount of generated voltage depended upon the application area on the body and its deformation, thread type, stitch type, stitch length, and shape of embroidery. A stitch length of more than 2 mm with a line density of 1 line per mm resulted in a stretchable sample. The state of the art of the developed sensors is their low price, flexibility, and low weight. They are all obtained with commercially available embroidery yarns and commercially available technology for their development.
在这项工作中，我们引入了一种基于刺绣的可拉伸(高达60-70%)摩擦电纳米发电机，它可以附着在人体的不同部位，如手指、膝盖、肘部、背部或肩膀，以感知身体的运动。它可以作为医疗保健和体育活动监测的活动识别。该传感器由绣在可拉伸导电基板上的不同纱线组成，使其能够感知不同身体部位的不同机械变形。选择不同的缝线样式、图案、缝线长度和形状，以适应单向、双向和多向的作用力，获得最大的运动灵活性。为了在可拉伸的基材上刺绣，在刺绣之前要添加一种不可拉伸的水溶性第二基材，然后用蒸汽除去。使用1.5 × 6 cm 2的样品来感应手指运动，产生274.5 mV的峰值电压。产生电压的大小取决于织物的应用区域及其变形、线型、针型、针长和刺绣的形状。针脚长度超过2毫米，线密度为1线每毫米导致可拉伸的样品。目前发展的传感器最先进的特点是价格低、灵活性强、重量轻。它们都是用市售的刺绣纱线和市售的开发技术获得的。
{"title":"Sensing of Body Movement by Stretchable Triboelectric Embroidery Aimed at Healthcare and Sports Activity Monitoring","authors":"H. Tahir, B. Malengier, G. B. Tseghai, L. Van Langenhove","doi":"10.3390/engproc2022015004","DOIUrl":"https://doi.org/10.3390/engproc2022015004","url":null,"abstract":": In this work, we introduced an embroidery-based stretchable (up to 60–70%) triboelectric nano-generator that could be attached to different parts of the human body such as fingers, knee, elbow, back, or shoulders, to sense the body movement. It can be used as activity recognition for health care and sport activity monitoring. The sensor was composed of different yarns embroidered on a stretchable conductive substrate, allowing it to sense diverse mechanical deformation of different body parts. Different stitching styles, patterns, stitch lengths, and shapes have been selected to cater to the unidirectional, bidirectional, and multidirectional force and obtain the maximum movement flexibility. In order to do embroidery on a stretchable substrate, a non-stretchable water-soluble second substrate has been added before embroidering, and is afterwards removed by application of steam. A sample of 1.5 × 6 cm 2 was used for sensing finger movement and generated a peak to peak voltage of 274.5 mV. The amount of generated voltage depended upon the application area on the body and its deformation, thread type, stitch type, stitch length, and shape of embroidery. A stitch length of more than 2 mm with a line density of 1 line per mm resulted in a stretchable sample. The state of the art of the developed sensors is their low price, flexibility, and low weight. They are all obtained with commercially available embroidery yarns and commercially available technology for their development.","PeriodicalId":420270,"journal":{"name":"E-Textiles 2021","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128209260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-09DOI: 10.3390/engproc2022015002
M. Nashed, Arash M. Shahidi, Theodore Hughes‐Riley, T. Dias
{"title":"Finite-Element Analysis of the Mechanical Stresses on the Core Structure of Electronically Functional Yarns","authors":"M. Nashed, Arash M. Shahidi, Theodore Hughes‐Riley, T. Dias","doi":"10.3390/engproc2022015002","DOIUrl":"https://doi.org/10.3390/engproc2022015002","url":null,"abstract":"","PeriodicalId":420270,"journal":{"name":"E-Textiles 2021","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114980465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-09DOI: 10.3390/engproc2022015003
Jitheesh V R, Rashmi Thakur, P. Jana
{"title":"Development of Smart Kneecap with Electrical Stimulation","authors":"Jitheesh V R, Rashmi Thakur, P. Jana","doi":"10.3390/engproc2022015003","DOIUrl":"https://doi.org/10.3390/engproc2022015003","url":null,"abstract":"","PeriodicalId":420270,"journal":{"name":"E-Textiles 2021","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130478424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-09DOI: 10.3390/engproc2022015005
Yi Zhou, Chunyan Zhang, C. Myant, R. Stewart
: This research utilizes a simple and effective dip coating/ultrasonication method to prepare porous graphene-coated sensing fabrics made with commercially produced acrylic/spandex yarn with multifunctional performance. We examine the electrochemical performance of graphene-coated fabrics and explore their potential in applications involving pressure sensors. The results show that our graphene-coated fabric demonstrates a maximum specific capacitance value of 17.4 F/g. When applied as a pressure sensor, the capacitance change rate of our sensor increases linearly with the increase in pressure applied to the fabrics. Our sensor also shows a fast response in a pressure loading–unloading test, which indicates an outstanding sensing property and shows promising capabilities as a supercapacitor.
{"title":"Knitted Graphene Supercapacitor and Pressure-Sensing Fabric","authors":"Yi Zhou, Chunyan Zhang, C. Myant, R. Stewart","doi":"10.3390/engproc2022015005","DOIUrl":"https://doi.org/10.3390/engproc2022015005","url":null,"abstract":": This research utilizes a simple and effective dip coating/ultrasonication method to prepare porous graphene-coated sensing fabrics made with commercially produced acrylic/spandex yarn with multifunctional performance. We examine the electrochemical performance of graphene-coated fabrics and explore their potential in applications involving pressure sensors. The results show that our graphene-coated fabric demonstrates a maximum specific capacitance value of 17.4 F/g. When applied as a pressure sensor, the capacitance change rate of our sensor increases linearly with the increase in pressure applied to the fabrics. Our sensor also shows a fast response in a pressure loading–unloading test, which indicates an outstanding sensing property and shows promising capabilities as a supercapacitor.","PeriodicalId":420270,"journal":{"name":"E-Textiles 2021","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129896465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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