Patent ID: 8033465
Filing Date: 2011-10-11
Classification: G06K

Abstract:
1. An apparatus for searching an RFID tag comprising: an antenna device provided with a predetermined directivity for carrying out radio communication with a specific RFID tag provided at a search target selected among a plurality of search targets; a transparent display device configured to be able to impart a predetermined field of view including a natural image of said specific search target to vision of an operator and held at a head portion of said operator; a region information acquisition portion configured to get communication region information including directivity information relating to directivity of said antenna device and transmission power information relating to transmission power of a signal output through said antenna device, corresponding to a communication region generated along said directivity from said antenna device; a display position determining portion configured to determine a display position of said communication region visualized and displayed in said predetermined field of view on the basis of said directivity information acquired by said region information acquisition portion; a display size determining portion configured to determine a display size of said communication region visualized and displayed in said predetermined field of view on the basis of said transmission power information acquired by said region information acquisition portion; a region display control portion configured to generate a display signal for visualization display of said communication region in said predetermined field of view of said display device, by means of the display position for the visualization display determined by said display position determining portion and the display size for the visualization display determined by said display size determining portion, and to output the signal to said display device; a target information acquisition portion configured to get search target information relating to said search target; a target display control portion configured to generate a display signal for visualization display of said search target information acquired by said target information acquisition portion in said predetermined field of view and to output the signal to said display device; a transmission processing device configured to generate an inquiry signal to said RFID tag relating to said search target and to transmit the signal to said RFID tag present in said communication region through said antenna device; a receiving processing device capable of receiving a response signal transmitted from said RFID tag in response to said inquiry signal through said antenna device; a receiving display control portion configured to generate a display signal for making the corresponding display in said predetermined field of view when said response signal from said RFID tag in response to said inquiry signal is received by said receiving processing device and to output the signal to said display device; an azimuth detecting device configured to detect a relative azimuth of said display device with respect to a reference article; and an azimuth storage device configured to store said relative azimuth detected by said azimuth detecting device as a receiving azimuth when said response signal from said RFID tag in response to said inquiry signal is received by said receiving processing device.