Patent ID: 8072328
Filing Date: 2011-12-06
Classification: G06K

Abstract:
1. A first tag communication apparatus, adapted to perform radio communications with a second tag communication apparatus and an RFID tag provided on a moving object, the first tag communication apparatus comprising: an antenna; a controller, operable to cause the antenna to transmit first radio waves while changing a first direction that the first radio waves are transmitted; a receiver, operable to receive a second radio waves transmitted from the second tag communication apparatus and to receive a tag information transmitted from the RFID tag in response to the first radio waves transmitted from the antenna; an extractor, operable to extract, from the second radio waves, synchronizing information indicative of a timing that the second tag communication apparatus changes a second direction that the second radio waves are transmitted therefrom; a synchronizer, operable to synchronize a timing that the controller changes the first direction with the timing that the second tag communication apparatus changes the second direction, based on the synchronizing information; and a generator, operable to associate the tag information with temporal information indicative of when the receiver receives the tag information, and to generate a plurality of data sets including the temporal information and angle information which is indicative of the direction that the first radio waves are transmitted when the receiver receives the tag information.