Pet care system, pet care robot and method for controlling pet care robot

A method for controlling a mobile robot comprising:

• transmitting a search signal through a plurality of antennas;
• receiving a response signal corresponding to the search signal from a wearable device worn on a pet through the plurality of antennas;
• determining a separation distance between the mobile robot and the wearable device based on the received response signal;
• determining a moving direction of the mobile robot based on the separation distance;
• detecting an event occurrence in which the wearable device does not move for a predetermined period of time based on the response signal received from the wearable device;
• transmitting event occurrence information to a station so that the station outputs a sound based on the detection of the event occurrence;
• determining an operation of a mobility driver configured to move the mobile robot based on a separation distance between the mobile robot and the wearable device;
• stopping the operation of the mobility driver when the separation distance is within a first distance from the wearable device;
• controlling the mobility driver to change a direction toward a position of the wearable device when the separation distance is greater than the first distance from the wearable device and within a second distance from the wearable device, wherein the second distance is greater than the first distance;
• and
• controlling the mobility driver to move while following the wearable device when the separation distance is greater than the second distance from the wearable device.