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Lookup NU author(s): Aobo Zhao,
Professor Gui Yun TianORCiD
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© The Institution of Engineering and Technology 2018. A radio frequency identification (RFID) based system is developed in this paper as a novel passive wireless sensor to detect corrosion for structural health monitoring (SHM) of metallic surface through simulation, design, fabrication and experiment. Firstly, a 2D label-type antenna in a new configuration - circular three arm (CTA) element - is designed as an ultrahigh frequency (UHF) RFID sensor tag working on surface of steel samples. To improve gain and power transmission coefficient, a parasitic element has been added into the centre of CTA. The CTA antenna attached with the parasitic element - so called (CTAP) sensor - has a quality factor notably higher than similar metal mountable UHF RFID antennas that has been resulted to revelation of resonance frequency in measured forward interrogation power. A demonstration and validation system are introduced then to detect corrosion based on the shift of revealed resonance frequency in the forward interrogation power to activate the CTAP tag when placed on surface of corroded and non-corroded steel samples. Results show that the presented system could communicate with sensor tag to detect corrosion up to 2 m of read monitoring range at the UHF RFID standard bandwidth with a sensitivity around of 13 MHz.
Author(s): Soodmand S, Zhao A, Tian GY
Publication type: Article
Publication status: Published
Journal: IET Microwaves, Antennas and Propagation
Online publication date: 13/09/2018
Acceptance date: 03/05/2018
ISSN (print): 1751-8725
ISSN (electronic): 1751-8733
Publisher: Institution of Engineering and Technology
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