Patent ID: 7630792
Filing Date: 2009-12-08
Classification: G01S

Abstract:
1. A method for detecting a position of a mobile robot, the method comprising: storing position numbers for discriminating positions of a plurality of ultrasonic signal reception units; oscillating ultrasonic signals sequentially using a plurality of ultrasonic signal oscillating units of a charging station after receiving a radio frequency (RF) signal emitted at preset time intervals from the mobile robot; calculating time taken for each ultrasonic signal generated by the plurality of ultrasonic signal oscillating units of the charging station to reach the mobile robot; calculating a distance between the charging station and the mobile robot based on the calculated reaching time; calculating an angle between the charging station and the mobile robot based on the calculated distance value and a preset distance value between the plurality of ultrasonic signal oscillating units; and detecting a proceeding direction of the mobile robot by receiving the ultrasonic signals.