Utilization of motion and spatial identification in RFID systems

摘要

In one aspect where a load or a subset of one or more tags is in motion relative to an RFID reader system, the RFID system obtains tag readings and derives tag scalar or vector motional data e.g. tag velocity, tag acceleration, and/or rate of change of tag acceleration which can be compared to known tag motional information to distinguish true tags of interest from false positives which are unavoidably also within the field of the reader system. An antenna system may also make readings during distinctive movement patterns of true tags, such as vertical or arcuate movement and utilize computed tag motional data based on the tag readings to distinguish true tags from false positives. Two components of the RFID system may communicate information on identified tags, and/or interact (e.g. by silencing tags), so as to cooperate in identifying true positive tags.

主权项

1. A radio frequency identification system comprising
a load transporter having a load receiving space for receiving a radio frequency identification tagged item with a true tag, moved from an external region external to the load receiving space to the load receiving space of the load transporter; a radio frequency identification reader system for taking tag readings during movement of the true tag along a path from the external region to the load receiving space of the load transporter; and a processing system having true tag motional information as to predetermined or measured movement of the true tag along said path from the external region to the load receiving space, and comparing tag motional data based on the tag readings with the true tag motional information to establish whether the tag readings represent a true tag moving along said path to the load receiving space or represent an extraneous tag.