Tracking of RFID Tags Moving on a Conveyor Belt Using Inverse SAR Approach

DOI

10.2991/iwama-16.2016.15How to use a DOI?

Keywords

RFID; synthetic aperture; tracking; phase measurement

Abstract

This paper proposes a novel method for tracking the moving items attached with ultrahigh frequency(UHF) radio frequency identification tags (RFID) on a conveyor belt. The localization method is based on phase measurements which is sampled from the radio signal backscattered from the tag antenna to reader antenna. The basic idea behind our method is that a virtual antenna array can be built by exploiting the priori knowledge that the speed and trajectory of the conveyor is known in advance. Thus an inverse synthetic aperture (SAR) can be formed. In order to alleviate the device heterogeneity, phase difference is leveraged to calculate the holographic image, which can be used to reconstruct the tag's absolute trajectory moving on a conveyor belt. Our approach is illustrated in numerical simulations. Finally the performance of our method is also investigated in a real conveyor belt scenario. The experimental results demonstrate that our design is robust to device heterogeneity and is able to achieve fine-grained localization.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Haishu Ma
AU  - Kesheng Wang
PY  - 2016/11
DA  - 2016/11
TI  - Tracking of RFID Tags Moving on a Conveyor Belt Using Inverse SAR Approach
BT  - Proceedings of the 6th International Workshop of Advanced Manufacturing and Automation
PB  - Atlantis Press
SP  - 81
EP  - 85
SN  - 2352-5428
UR  - https://doi.org/10.2991/iwama-16.2016.15
DO  - 10.2991/iwama-16.2016.15
ID  - Ma2016/11
ER  -