Textile-Based Weft Knitted Strain Sensors:  Effect of Fabric Parameters on Sensor Properties

Atalay, Özgür; Kennon, W.R.; Husain, Muhammad Dawood

doi:10.3390/s130811114

Cited by 144 publications

(151 citation statements)

References 18 publications

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“…On the other hand, our intention is to replace all cables, even the transmission lines carrying the RF signal, with conductive yarn routes on the firefighter suit [8][9][10][11]. Moreover, we intend to replace ECG sensors with textile electrodes, either based on conductive yarns or screen-printed [12,13], while respiration rate, temperature and skin moisture (perspiration) could be monitored using appropriately designed variations of conductive yarn based knitted sensors [14][15][16][17]. Finally, even the antenna could be partially or fully textile [18,19].…”

Section: Wearable Sensor Nodementioning

confidence: 99%

Physiological parameters monitoring of fire-fighters by means of a wearable wireless sensor system

Potirakis

Mitilineos

Chatzistamatis

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Physiological parameter monitoring may be useful in many different groups of the population, such as infants, elderly people, athletes, soldiers, drivers, fire-fighters, police etc. This can provide a variety of information ranging from health status to operational readiness. In this article, we focus on the case of first responders and specifically fire-fighters. Firefighters can benefit from a physiological monitoring system that is used to extract multiple indications such as the present position, the possible life risk level, the stress level etc. This work presents a wearable wireless sensor network node, based on low cost, commercial-offthe-self (COTS) electronic modules, which can be easily attached on a standard fire-fighters' uniform. Due to the low frequency wired interface between the selected electronic components, the proposed solution can be used as a basis for a textile system where all wired connections will be implemented by means of conductive yarn routing in the textile structure, while some of the standard sensors can be replaced by textile ones. System architecture is described in detail, while indicative samples of acquired signals are also presented.

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Section: Wearable Sensor Nodementioning

confidence: 99%

Physiological parameters monitoring of fire-fighters by means of a wearable wireless sensor system

Potirakis

Mitilineos

Chatzistamatis

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Related research [7][8][9][10] studied the contacts between electro-conductive yarns embedded in knitted fabrics. Unlike in woven hybrid fabrics, in knitted fabrics, contacts appear between two consecutive conductive loops and not only at the intersection of weft and warp yarns.…”

Section: Methodsmentioning

confidence: 99%

“…Atalay et al [7] concluded that it is possible to manipulate the sensing properties of knitted sensors and the sensor response may be engineered by varying the production parameters applied to specific designs [8]. Zhang et al [9] created knitted strain sensors by using stainless steel and carbon yarns and identified that the contacting electrical resistance between overlapped fibers is the primary factor in the sensing mechanism.…”

Section: Introductionmentioning

confidence: 99%

Study of the Contact Resistance of Interlaced Stainless Steel Yarns Embedded in Hybrid Woven Fabrics

Vasile

Deruck

Hertleer

et al. 2017

Autex Research Journal

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The contact resistance of two interlacing electro-conductive yarns embedded in a hybrid woven fabric will constitute a problem for electro-conductive textiles under certain circumstances. A high contact resistance can induce hotspots, while a variable contact resistance may cause malfunctioning of the components that are interconnected by the electro-conductive yarns. Moreover, the contact robustness should be preserved over time and various treatments such as washing or abrading should not alter the functioning of the electro-conductive textiles. The electrical resistance developed in the contact point of two interlacing electro-conductive yarns is the result of various factors. The influence of diameter of the electro-conductive stainless steel yarns, the weave pattern, the weft density, and the abrasion on the contact resistance was investigated. Hybrid polyester fabrics were produced according to the design of experiments (DoE) and statistical models were found that describe the variation of the contact resistance with the selected input parameters. It was concluded that the diameter of the stainless steel warp and weft yarns has a statistically significant influence on the contact resistance regardless of the weave. Weft density had a significant influence on the contact resistance but only in case of the twill fabrics. Abrasion led to an increase in contact resistance regardless of the weave pattern and the type of stainless steel yarn that was used. Finally, a combination of parameters that leads to plain and twill fabrics with low contact resistance and robust contacts is recommended.

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“…Within the domain of wearable sensors, most of the studies have been limited towards the textile-based ECG and respiration sensors. To measure human body temperature, most of the researchers have counted on the commercially available temperature sensors (mainly thermocouples, thermistors, and integrated circuit temperature chips), which are typically attached on the surface of the garment [12,[14][15][16][17][18][19]. The literature review has demonstrated that the fabrication of textile-based temperature sensors has been little explored in a few individual studies [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Analysis of the Temperature–Resistance Relationship of Temperature Sensing Fabric

Husain

Atalay

et al. 2016

Fibers

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This paper reports the uncertainty analysis of the temperature-resistance (TR) data of the newly developed temperature sensing fabric (TSF), which is a double-layer knitted structure fabricated on an electronic flat-bed knitting machine, made of polyester as a basal yarn, and embedded with fine metallic wire as sensing element. The measurement principle of the TSF is identical to temperature resistance detector (RTD); that is, change in resistance due to change in temperature. The regression uncertainty (uncertainty within repeats) and repeatability uncertainty (uncertainty among repeats) were estimated by analysing more than 300 TR experimental repeats of 50 TSF samples. The experiments were performed under dynamic heating and cooling environments on a purpose-built test rig within the temperature range of 20-50 • C. The continuous experimental data was recorded through LabVIEW-based graphical user interface. The result showed that temperature and resistance values were not only repeatable but reproducible, with only minor variations. The regression uncertainty was found to be less than ±0.3 • C; the TSF sample made of Ni and W wires showed regression uncertainty of <±0.13 • C in comparison to Cu-based TSF samples (>±0.18 • C). The cooling TR data showed considerably reduced values (±0.07 • C) of uncertainty in comparison with the heating TR data (±0.24 • C). The repeatability uncertainty was found to be less than ±0.5 • C. By increasing the number of samples and repeats, the uncertainties may be reduced further. The TSF could be used for continuous measurement of the temperature profile on the surface of the human body.

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Textile-Based Weft Knitted Strain Sensors: Effect of Fabric Parameters on Sensor Properties

Cited by 144 publications

References 18 publications

Physiological parameters monitoring of fire-fighters by means of a wearable wireless sensor system

Physiological parameters monitoring of fire-fighters by means of a wearable wireless sensor system

Study of the Contact Resistance of Interlaced Stainless Steel Yarns Embedded in Hybrid Woven Fabrics

Uncertainty Analysis of the Temperature–Resistance Relationship of Temperature Sensing Fabric

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