Wednesday, 4 December 2013

Self-Recognition of Vehicle Position Using UHF Passive RFID Tags


          During the past five years, the ultrahigh frequency (UHF) passive radio frequency identification (RFID) technology has been widely adopted as a direct response to the needs of the supply chain management. When products affixed with UHF passive RFID tags (“Tag(s)”) are released, they travel from manufacturing plants to warehouses to retail shops. For supply chain management operators, it would be of great interest to be able to detect the current location of such products in real time. This paper proposes a method that enables self recognition of a mobile vehicle’s current position by utilizing ultrahigh frequency (UHF) passive radio-frequency identification (RFID) tags. The proposed method can be used in real industry environments such as complex storage warehouses where many different goods are dispersed throughout a wide area. In particular, the proposed method makes use of two UHF RFID readers with identical emission configurations attached to a vehicle to identify a reference RFID tag. By utilizing the received signal strength indicator obtained by the readers from the reference RFID tag, the precise position of the moving vehicle can be obtained. The experiments prove the effectiveness of the proposed method in accurately estimating the vehicle position.

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