研究目的
To present passive UHF RFID tags integrated into normal work gloves for wearable RFID applications, introducing embroidery as a new efficient antenna fabrication method and evaluating their performance compared to electro-textile and copper tape tags.
研究成果
Embroidered glove-tags achieve read ranges of around 1 meter, suitable for practical applications like identification and access control, offering cost-effectiveness and ease of integration. Future work includes improving read ranges by modifying embroidery patterns and testing in real-world environments.
研究不足
The read ranges of embroidered tags are shorter than electro-textile and copper tape tags; human body effects and antenna crumpling in simulations vs. reality cause discrepancies; performance could be improved with full embroidery but at higher cost and time.
1:Experimental Design and Method Selection:
The study involved designing and simulating glove-tag antennas using ANSYS HFSS, fabricating three types of tags (embroidered, electro-textile, copper tape), and evaluating their performance through wireless measurements in anechoic and office environments.
2:Sample Selection and Data Sources:
A male test subject was used for on-body measurements. Tags were fabricated and tested.
3:List of Experimental Equipment and Materials:
Conductive yarn (Shieldex multifilament thread 110f34 dtex 2-ply HC), electro-textile (Less EMF Shieldit Super Fabric, Cat. #A1220), copper tape, RFID IC (NXP UCODE G2iL), conductive epoxy (Circuit Works CW2400), embroidery machine (Husqvarna Viking), laser cutter (Epilog Fusion Laser Model 13000), measurement system (Voyantic Tagformance), mobile reader (Nordic ID Medea).
4:Experimental Procedures and Operational Workflow:
Antennas were designed and optimized in HFSS, fabricated using embroidery, cutting, and attachment methods, interconnected with conductive epoxy, and measured for read ranges and practical applications like identification and access control.
5:Data Analysis Methods:
Read ranges were estimated using threshold power measurements and formula based on ISO 18000-6C standard, with comparisons made between tag types and environments.
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Epilog Fusion Laser
Model 13000
Epilog
Laser cutter used to cut the electro-textile antennas.
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Shieldex multifilament thread
110f34 dtex 2-ply HC
Shieldex
Used as conductive yarn for embroidering the antenna pattern on gloves.
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Less EMF Shieldit Super Fabric
Cat. #A1220
Less EMF
Used as electro-textile material for fabricating reference tag antennas.
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copper tape
Used for fabricating reference tag antennas by cutting and attaching to gloves.
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NXP UCODE G2iL RFID IC
NXP
Used as the integrated circuit for the RFID tags, provided in a strap with copper pads.
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Circuit Works CW2400
CW2400
Circuit Works
Conductive epoxy used to attach the RFID IC pads to the antennas.
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Husqvarna Viking
Husqvarna
Embroidery machine used to embroider the conductive yarn onto the gloves.
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Voyantic Tagformance
Voyantic
RFID measurement system used for wireless measurements, includes an RFID reader with adjustable frequency and power.
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Nordic ID Medea
Nordic ID
Commercial mobile reader used for practical testing of glove-tags in identification and access control scenarios.
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