Impact of Conductive Yarns on an Embroidery Textile Moisture Sensor

Martínez-Estrada, Marc; Moradi, Bahareh; Fernández‐García, Raúl; Gil, Ignacio

doi:10.3390/s19051004

Cited by 33 publications

(39 citation statements)

References 12 publications

(13 reference statements)

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“…In addition, the number of contact points between the water on the paper and the yarns decreased faster with hydrophilic fibres, such as PAC or VIS ( Figure 10 a). According to a hypothesis by Martínez-Estrada et al [ 36 ], the non-conductive fibres did not play a significant role in the signal strength.…”

Section: Resultsmentioning

confidence: 89%

In Situ Detection of Water Leakage for Textile-Reinforced Composites

Regnier

Cayla

Campagne

et al. 2020

Sensors

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By incorporating electrically conductive yarns into a waterproof membrane, one can detect epoxy resin cracking or liquid leakage. Therefore, this study examined the electrical conductivity variations of several yarns (metallic or carbon-based) for cracking and water detection. The first observations concerned the detectors’ feasibility by investigating their conductivity variations during both their resin implementation processes and their resin cracking. Throughout this experiment, two phenomena were detected: the compression and the separation of the fibres by the resin. In addition, the resin cracking had an important role in decreasing the yarns’ conductivity. The second part of this study concerned water detection. Two principles were established and implemented, first with yarns and then with yarns incorporated into the resin. First, the principle of absorption was based on the conductivity variation with the yarns’ swelling after contact with water. A short circuit was established by the creation of a conductive path when a drop of water was deposited between two conductive, parallel yarns. Through the influence of the yarns’ properties, this study explored the metallic yarns’ capacity to better detect water with a short circuit and the ability of the carbon-based yarns to detect water by the principle of absorption.

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Section: Resultsmentioning

confidence: 89%

In Situ Detection of Water Leakage for Textile-Reinforced Composites

Regnier

Cayla

Campagne

et al. 2020

Sensors

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“…Silver-plated nylon yarn (140/17 dtex) was embroidered on cotton fabric (0.43 mm) and demonstrated to perform as a humidity sensor between 25% and 65% at 20 °C based on changes in impedance [56]. Subsequently, the same researchers determined that Shieldtex ® 117/17 dtex 2-ply (polyamide and silver) had lower sensitivity to humidity (30% to 65%) than Bekaert yarns of 80% polyester/20% stainless steel, 80% cotton/20% stainless steel embroidered on 100% cotton (0.43 mm) [54].…”

Section: Electrically Conductive Materials—types and Incorporationmentioning

confidence: 99%

Fabrics and Garments as Sensors: A Research Update

Wilson

Laing

2019

Sensors

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Properties critical to the structure of apparel and apparel fabrics (thermal and moisture transfer, elasticity, and flexural rigidity), those related to performance (durability to abrasion, cleaning, and storage), and environmental effects have not been consistently addressed in the research on fabric sensors designed to interact with the human body. These fabric properties need to be acceptable for functionalized fabrics to be effectively used in apparel. Measures of performance such as electrical conductivity, impedance, and/or capacitance have been quantified. That the apparel/human body system involves continuous transient conditions needs to be taken into account when considering performance. This review highlights gaps concerning fabric-related aspects for functionalized apparel and includes information on increasing the inclusion of such aspects. A multidisciplinary approach including experts in chemistry, electronics, textiles, and standard test methods, and the intended end use is key to widespread development and adoption.

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“…There are a lot of different substrates where a sensor could be embroidered on to gather data from the environment or the human body [13]. The two most used materials for textiles are cotton and polyethylene terephthalate [14,15,16]. Cotton is a natural staple fiber that grows around the seeds of cotton plants.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of fabric substrate on a moisture sensor

Martínez-Estrada

Fernández‐García

Gil

2020

The Journal of The Textile Institute

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In this work, an embroidered textile moisture sensor is proposed and characterized with three different fabric substrates. The sensors are based on a capacitive interdigitated structure embroidered on a textile substrate with a conductive yarn. The performance of three different type of substrates has been addressed. In order to evaluate the sensor behavior, the impedance of the sensor has been measured by means of an LCR meter from 20 Hz to 200 kHz on a climatic chamber with a sweep of the relative humidity from 30% to 80% at 20ºC. The results show that the fabric substrate defines the electrical properties of the sensor due to both, the substrate permittivity and size yarn thickness increase. This sensor dependence determines the optimum substrate to be used to develop wearable applications for moisture measurement.

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Impact of Conductive Yarns on an Embroidery Textile Moisture Sensor

Cited by 33 publications

References 12 publications

In Situ Detection of Water Leakage for Textile-Reinforced Composites

In Situ Detection of Water Leakage for Textile-Reinforced Composites

Fabrics and Garments as Sensors: A Research Update

Experimental analysis of fabric substrate on a moisture sensor

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