RFID apparatus calibration

摘要

Calibrating an RFID apparatus includes: positioning the RFID apparatus within a distance of an RFID tag array, the RFID apparatus having an RFID antenna to detect RFID tags and at least one motion sensing device; aligning the RFID apparatus with the RFID tag array using the motion sensing device; acquiring (i) RFID tag information including signal strength using the RFID antenna to generate an RFID antenna radiation pattern that includes a region of at least one RFID tag exceeding a signal strength, and (ii) position information of the RFID tag in the RFID tag array; and determining calibration values of the RFID apparatus based on a one or more alignment differences between the acquired region of the RFID tag information and the position information of the motion sensing device; adjusting the RFID apparatus scan path data acquired from the at least one motion sensing device using the determined calibration values.

主权项

1. A method of calibrating an RFID apparatus, the method comprising:
positioning the RFID apparatus in a calibration location within a predetermined distance of an RFID tag array, the RFID apparatus having at least one RFID reader device including at least one transmit power level control and at least one RFID antenna to detect RFID tags and at least one motion sensing device; aligning the RFID apparatus with a visible reference mark on the RFID tag array using the motion sensing device by aligning the RFID apparatus such that one axis of the motion sensing device intersects an optical reference mark on the RFID tag array and a second axis of the motion sensing device is either vertical or horizontal, and setting the RFID apparatus transmit power level control to a value determined by the position of the RFID apparatus relative to the RFID tag array; acquiring (i) RFID tag information including signal strength using the at least one RFID reader device to generate an RFID antenna radiation pattern that includes a heat map, the heat map including a region of at least one RFID tag exceeding a predetermined signal strength, and (ii) position information stored in the at least one RFID tag exceeding a predetermined signal strength; and determining calibration values of the RFID apparatus based on alignment differences between the acquired RFID tag position information and at least one sensing axis of the motion sensing device.