Title :
Implementation and wireless readout of passive UHF RFID strain sensor tags based on electro-textile antennas
Author :
Feiyuan Long ; Xiao Dong Zhang ; Bjorninen, Toni ; Virkki, Johanna ; Sydanheimo, Lauri ; Yan-Cheong Chan ; Ukkonen, Leena
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China
Abstract :
Sensing capabilities embedded in a passive UHF RFID tag provide a battery-free wireless sensor equipped with a digital identifier. We present an RFID strain sensor tag based on a stretchable antenna made of conductive fabrics. To create an efficient antenna for the sensor tag, we use non-stretchable and highly conductive copper-coated fabric to form the main antenna body and join a section of stretchable conductive fabric by means of sewing with conductive thread. We test wirelessly two different sensors with 1 cm and 3 cm stretchable sections and characterize them in terms of the maximal sensor readout distance and the response of its backscatter strength to the antenna elongation. Our results show that the percentage change in the backscatter strength is in approximately linear relation with the antenna elongation.
Keywords :
antennas; copper; radiofrequency identification; strain sensors; wireless sensor networks; Cu; battery-free wireless sensor; conductive fabrics; conductive thread; copper-coated fabric; digital identifier; electro-textile antennas; passive UHF RFID strain sensor tags; size 1 cm; size 3 cm; stretchable antenna; wireless readout; Dipole antennas; Fabrics; Radiofrequency identification; Strain; Wireless communication; Wireless sensor networks; RFID sensor tags; electro-textile antennas; strain sensors; textile antennas; wireless sensors;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
Conference_Location :
Lisbon
