System and method for navigating a robotic lawnmower into a docketing position

Abstract

A robotic lawnmower system comprising a charging station () and a robotic lawnmower (), the charging station comprising a signal generator () to which a navigation signal cable () is to be connected, the signal generator () being configured to transmit a signal () through the navigation signal cable (), and the robotic lawnmower () comprising: a propulsion system (); a sensor () configured to sense field values of magnetic fields generated by the signal () in the navigation signal cable (); and a controller () configured to determine that the robotic lawnmower () is in a docking position; record the field value(s) of the sensed signal; control the propulsion system () to reverse out of said docking position; and to control the propulsion system () to enter into said docking position by sensing a current field value; comparing the current field value to the stored field value(s); and determining how to navigate the robotic lawnmower () based on the comparison and navigating accordingly.