Plurality of autonomous mobile robots and controlling method for the same

1. A mobile robot, comprising:

a traveling unit configured to move or rotate a main body of the mobile robot;

a communication unit configured to perform communication with another mobile robot;

a sensing unit configured to sense the other mobile robot existing in a detection area encompassing a predetermined projected angle with respect to a front of the main body; and

a control unit configured to rotate the main body so that the other mobile robot is sensed within the detection area, and control the communication unit to transmit a control signal to the other mobile robot, the control signal configured to cause the other mobile robot to travel in a linear direction for a predetermined distance, when the other mobile robot is present in the detection area;

wherein the control unit is configured to rotate the main body so that the other mobile robot is located back in the detection area when the other mobile robot is moved away from the detection area due to the linear travel of the other mobile robot, and

wherein the control unit is configured to determine, using the sensing unit, a direction that the other mobile robot is moved away from the detection area, and rotate the main body in a direction corresponding to the determined direction.

2. The robot of claim 1 , wherein the control unit is configured to determine, using the sensing unit, a direction in which the other mobile robot faces based on a direction in which the other mobile robot linearly travels.

3. The robot of claim 1 , wherein the control unit is configured to:

determine a relative position of the other mobile robot using the sensing unit,

determine a plurality of relative positions of the other mobile robot while causing the other mobile robot to travel in a linear direction, and

determine a direction that the other mobile robot faces based on the plurality of relative positions of the other mobile robot.

4. The robot of claim 1 , wherein the control unit is configured to determine coordinates of a position of the other mobile robot and an angle of a direction that the other mobile robot faces, based on a relative position of the other mobile robot and the direction that the other mobile robot faces as determined by the sensing unit.

5. The robot of claim 1 , wherein the control unit is configured to rotate the main body based on a determination of a relative position of the other mobile robot using the sensing unit.

6. The robot of claim 1 , wherein the control unit is configured to determine a relative position of the other mobile robot using the sensing unit, based on presence of the other mobile robot within the detection area resulting from the rotation of the main body.

7. The robot of claim 6 , wherein the control unit transmits the control signal to the other mobile robot after determining the relative position of the other mobile robot.

8. The robot of claim 1 , wherein the control unit is configured to:

transmit and receive an ultra-wideband signal to and from the other mobile robot using the sensing unit,

determine a distance to the other mobile robot using the ultra-wideband signal, and

determine a relative position of the other mobile robot, based on an angle by which the main body is rotated so that the other mobile robot is present within the detection area, and within the determined distance.

9. The robot of claim 1 , wherein the control unit is configured to rotate the main body such that a front surface of the main body faces one point of the other mobile robot.

10. The robot of claim 1 , wherein the control unit is configured to:

determine a relative position of the other mobile robot and a direction that the other mobile robot faces, based on the linear travel of the other mobile robot for the predetermined distance, and

transmit to the other mobile robot a control signal for moving the other mobile robot to a specific point within the detection area, based on the relative position of the other mobile robot and the direction that the other mobile robot faces.

11. The robot of claim 10 , wherein the control unit is configured to transmit to the other mobile robot a control signal for rotating the other mobile robot to face a direction that is the same as a direction faced by the front of the main body when the other mobile robot is sensed as being located at the specific point.

12. The robot of claim 1 , wherein the control unit is configured to:

determine a relative position of the other mobile robot and a direction that the other mobile robot faces, based on the linear travel of the other mobile robot for the predetermined distance, and

move the main body to a point which is located at the rear of the other mobile robot with a predetermined spaced distance from the other mobile robot.

13. The robot of claim 12 , wherein the control unit is configured to rotate the main body to face the same direction as the direction that the other mobile robot faces after the main body is moved to the point that is located at the rear of the other mobile robot with the predetermined spaced distance from the other mobile robot.

14. A method for controlling a mobile robot, the method comprising:

rotating a main body of the mobile robot such that another mobile robot is sensed within a detection area encompassing a predetermined projected angle with respect to the front of the main body;

transmitting to the other mobile robot a control signal configured for causing linear travel of the other mobile robot by a predetermined distance when the other mobile robot is located within the detection area resulting from the rotation of the main body;

determining a direction that the other mobile robot faces based on a direction that the other mobile robot travels in a linear direction;

rotating the main body so that the other mobile robot is located back in the detection area when the other mobile robot is moved away from the detection area due to the linear travel of the other mobile robot,

determining, using a sensing unit, a direction that the other mobile robot is moved away from the detection area, and

rotating the main body in a direction corresponding to the determined direction.