Mobile robot and control method therefor

A mobile robot comprising:

• a main body that travels in an area;
• an image acquisition processor configured to acquire an image;
• a communication processor configured to receive a position signal transmitted from a first mobile robot that the main body is configured to follow;
• a control processor configured to determine a position of the first mobile robot from an image acquired by the image acquisition processor or the position signal, and configured to set a travel route with the position of the first mobile robot as a target point;
• and
• a driving processor configured to move the main body, such that the main body follows the first mobile robot along the travel route,
• wherein the control processor changes a position calculation method based on a distance to the first mobile robot, and
• wherein the control processor determines the position of the first mobile robot from the acquired image when the distance to the first mobile robot is greater than or equal to a set distance, and when the distance to the first mobile robot is less than the set distance, the control processor receives the position signal of the first mobile robot and determines the position of the first mobile robot;
• and
• wherein the control processor extracts a marker from the acquired image, calculates the position of the marker in the area, and based on the calculation determines the position of the first mobile robot, and when a marker confirming the position of the first mobile robot is not included in the acquired image, the control processor receives the position signal of the first mobile robot by changing the position calculation method, and
• wherein, when the position signal is not received, the control processor changes the position calculation method, receives the acquired image and determines the position of the first mobile robot according to the position of a marker extracted from the acquired image.