System and method for returning robot cleaner to charger

摘要

A system for returning a robot (100) to a charger (300) includes: a homing signal transmitter (320), including at least first, second, and third signal transmitters, each adapted to be provided at a front side of the charger and to respectively transmit signals which are different from each other in at least one of a code and a transmission distance, and a fourth signal transmitter, adapted to be provided on at least one lateral side of the charger and to transmit a signal which is different from the signals of the first, second, and third transmitters in code; a homing signal receiver (120) provided at the robot and to receive at least one signal transmitted from the homing signal transmitter; and a controller (210) adapted to identify the at least one signal and to control the robot to return to the charger based at least in part on the at least one signal.