A robot cleaner comprises a suction unit installed within a cleaner body,
for sucking dirt on a floor; a driving unit for moving the cleaner body;
a wheel installed at a bottom of the cleaner body to be contacted with
the floor, and rotated by movement of the cleaner body; a detecting unit
for detecting whether the wheel is rotated; and a control unit for
controlling the driving unit in response to signal from the detecting
unit. Accordingly, the robot cleaner can smoothly and continuously carry
out a cleaning operation, even when the robot cleaner is abnormally
stopped due to an obstacle which is not previously recognized in
traveling.
