Abstract:
Radio frequency identification (RFID) technology is expected to provide a new way for accurate and convenient localization of underground pipelines. However, a new passiv...Show MoreMetadata
Abstract:
Radio frequency identification (RFID) technology is expected to provide a new way for accurate and convenient localization of underground pipelines. However, a new passive RFID localization method that is closely coupled with complex underground environments is still an unsolved challenge. First, this work analyzes in detail the inductive coupling process of underground passive low-frequency (LF) RFID system, identifies the shortcomings of the traditional RFID localization methods based on received signal strength indicator, and proposes a new passive RFID localization method based on the antenna magnetic field model. Then, a series analytical model of reader antenna magnetic field is derived, and the correctness is verified through the simulations. Compared with the traditional magnetic field model in the air, the proposed magnetic field model considers the influence of underground media, which is more in line with the actual underground situation. At the same time, Gauss–Newton method is employed to solve the unknown parameters that cannot be measured in the localization model. Finally, an underground RFID localization experimental testing platform is built, and the experimental results show that using the proposed magnetic field model for RFID localization, the maximum localization error is less than 0.32 cm, which verifies the feasibility of the proposed underground passive LF RFID localization method based on the antenna magnetic field model.
Published in: IEEE Transactions on Instrumentation and Measurement ( Volume: 73)