Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7123156 | Measurement | 2016 | 18 Pages |
Abstract
High frequency RFID sensors are attractive in diverse applications where sensor performance is required at a low cost and dimension restriction. An approach adapting commercial passive 13.56Â MHz RFID tags has been developed for sensing corrosion stage. This investigation includes balance of sensing and positioning of RFID sensors for corrosion detection by analysing real and imaginary parts of the complex impedance. With passive HF RFID sensors, real part and imaginary part of complex impedance have been extracted from the reader coil with VNA (vector network analyser) and delivering a unique capability for corrosion sensing with different atmospheric exposure time steel samples (1Â month, 6Â months, 10Â months and 12Â months). With different positioning (5-25Â mm), features extraction based on the complex impedance with PCA (principal component analysis) has been designed for position-independent corrosion evaluation.
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Authors
Hong Zhang, Ruizhen Yang, Yunze He, Gui Yun Tian, Luxiong Xu, Ruikun Wu,