Patent ID: 8610563
Filing Date: 2013-12-17
Classification: G01S

Abstract:
1. A tag information processing apparatus, comprising: a receiving section for receiving read-out information of an RFID tag, the read-out information obtained through N reading operations (where N represents an integer equal to or greater than 2) carried out for an RFID tag-reading area; a detection frequency information obtaining section for obtaining detection frequency information on the basis of the read-out information received by the receiving section, the detection frequency information indicating a detection frequency at which the read-out information of the RFID tag is detected in the N reading operations, the detection frequency information obtaining section obtaining the detection frequency information on the RFID tag whose read-out information was read in a first reading operation of the N reading operations; a movement determining section for determining whether or not the RFID tag has been moved out of the RFID tag-reading area, wherein, in a case where the detection frequency information obtained by the detection frequency information obtaining section indicates that the detection frequency at which the read-out information of the RFID tag is detected is low, the movement determining section determines that the RFID tag has been moved out of the RFID tag-reading area, the movement determining section carrying out the determination of whether or not the RFID tag has been moved out of the RFID tag-reading area with reference to the detection frequency information on the RFID tag whose read-out information was read in the first reading operation, wherein the RFID tag subjected to the determination is the only RFID tag whose read-out information was read in the first reading operation; and an output section for outputting a result of the determination made by the movement determining section; the receiving section also receiving identification information which is included in the read-out information of the RFID tag that was subjected to a determination of whether or not it was moved out of the RFID tag-reading area, wherein the identification information indicates that the RFID tag was subjected to the determination, and the RFID tag that was subjected to the determination is not subjected to another determination of whether or not it has moved out of the RFID tag-reading area for a predetermined number of reading operations or for a predetermined period of time.