Indoor Item-Finding System using 3D Position of Passive RFID Tags Estimated by History of Tag Detection and Reader Movement

Abstract

We propose a novel indoor item-finding system with users’less burden using the 3D position of passive RFID (Radio Frequency Identification) tags estimated by the history of tag detection and reader movement. Our proposed system assists users in finding items by showing the distance and direction to the item they want to find when any tags pre-attached in the room are detected. We consider that our system has the following two contributions. (1)The 3D position of all tags is estimated by the history of tag detection and reader movement obtained when using our system, so users do not need to input the position manually. (2)The distance and direction to the item are shown when any tags are detected, so users can find the item without approaching the item enough to directly detect the tag attached to the item. For confirming the usefulness of our system, we conducted an experiment in which users found items in an actual living space. As a result, we confirmed that our system enables users to find items in a short time with users’less subjective burden.