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Orientation Sensing Using Multiple Passive RFID Tags

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3 Author(s)
Krigslund, R. ; Dept. of Electron. Syst., Aalborg Univ., Aalborg, Denmark ; Popovski, P. ; Pedersen, G.F.

Knowing the inclination of an object can be valuable information in a supply chain application, e.g., when handling orientation-sensitive objects. In this letter, we present a method for sensing the inclination using radio frequency identification (RFID) technology. The method requires standard RFID equipment and assumes that each object is tagged with a passive UHF tag. We use a simple statistical estimator based on the received signal strength (RSS) of the tag reply. The performance is evaluated via experimental measurements, and the results are positive with a good precision within distances of 2 m.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:11 )

Date of Publication:

2012

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