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Keywords = RFID yarn

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12 pages, 2786 KiB  
Communication
UHF RFID Temperature Sensor Tag Integrated into a Textile Yarn
by Sofia Benouakta, Florin Doru Hutu and Yvan Duroc
Sensors 2022, 22(3), 818; https://doi.org/10.3390/s22030818 - 21 Jan 2022
Cited by 18 | Viewed by 4087
Abstract
This paper presents the design of an ultra high-frequency (UHF) radio frequency identification (RFID) sensor tag integrated into a textile yarn and manufactured using the E-Thread® technology. The temperature detection concept is based on the modification of the impedance matching between RFID [...] Read more.
This paper presents the design of an ultra high-frequency (UHF) radio frequency identification (RFID) sensor tag integrated into a textile yarn and manufactured using the E-Thread® technology. The temperature detection concept is based on the modification of the impedance matching between RFID tag’s antenna and the chip. This modification is created by the change in the resistance of a thermistor integrated within the tag system due to a temperature variation. Moreover, in order to obtain an environment independent detection, a differential approach is proposed that avoids the use of a pre-calibration phase by the use of a reference tag. Experimental characterization demonstrates the RFID sensor’s potential of detecting a temperature variation or a temperature threshold between 25 and 70 °C through the variation of the transmitted differential activation power. Full article
(This article belongs to the Special Issue RF Sensors: Design, Optimization and Applications)
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11 pages, 21716 KiB  
Article
Stretchable Textile Yarn Based on UHF RFID Helical Tag
by Sofia Benouakta, Florin Doru Hutu and Yvan Duroc
Textiles 2021, 1(3), 547-557; https://doi.org/10.3390/textiles1030029 - 22 Nov 2021
Cited by 8 | Viewed by 4456
Abstract
In the context of wearable technology, several techniques have been used for the fabrication of radio frequency identification (RFID) tags such as 3D printing, inkjet printing, and even embroidery. In contrast to these methods where the tag is attached to the object by [...] Read more.
In the context of wearable technology, several techniques have been used for the fabrication of radio frequency identification (RFID) tags such as 3D printing, inkjet printing, and even embroidery. In contrast to these methods where the tag is attached to the object by using sewing or simple sticking, the E-Thread® technology is a novel assembling method allowing for the integration of the RFID tag into a textile yarn and thus makes it embeddable into the object at the fabrication stage. The current E-Thread® yarn uses a RFID tag in which the antenna is a straight half-wave dipole that makes the solution vulnerable to mechanical strains (i.e., elongation). In this paper, we propose an alternative to the current RFID yarn solution with the use of an antenna having a helical geometry that answers to the mechanical issues and keeps quite similar electrical and radiative properties with respect to the present solution. The RFID helical tag was designed and simulated taking into consideration the constraints of the manufacturing process. The helical RFID tag was then fabricated using the E-Thread® technology and experimental characterization showed that the obtained structure exhibited good performance with 10.6 m of read range in the ultra high frequency (UHF) RFID band and 10% of tolerance in terms of elongation. Full article
(This article belongs to the Special Issue New Research Trends for Textiles)
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