Two-dimensional Location and Direction Estimating Method

In this paper, a method of estimating both the position and the rotation angle of an object on a measurement stage was proposed. The system utilizes the radio communication technology and the directivity of an antenna. As the preliminary study, an experimental system that employs RFID technology was developed. Two RFID tags are used for estimating the location of one target object. The experimental result revealed that even when the estimated location is not so accurate (about a 10-20 mm error), the rotation angle is accurately estimated (about 4.42 degree error on average). The result suggests that the proposed method will be useful for estimating the location and the direction of an object.