Husqvarna Ab

Ludvig Sjöholm

Peter Reigo

Ulf Ärlig

A robotic working tool comprising a sensor for detecting magnetic fields connected to a controller for controlling the operation of the robotic working tool. The controller is configured to operate according to a first control signal being transmitted through a first boundary wire and according to a second control signal being transmitted through a second boundary wire. The robotic working tool is thereby configured to operate within a composite work area comprising at least a first partial work area and a second partial work area. The first boundary wire delimits the first partial work area and the second boundary wire delimits the second partial work area. The at least first and second boundary wires provide a common perimeter for the composite work area. Analysing the magnetic fields detected by the sensor, the controller determines whether the robotic working tool is inside or outside the composite work area.

Perimeter marking for a robotic working tool

A robotic work tool system () comprising a robotic work tool () and a beacon marker (), said robotic work tool () comprising a beacon sensor () configured to sense a signal being transmitted by the beacon marker (), said beacon marker () marking an area () around an obstacle () in a work area () in which said robotic work tool () is arranged to operate, wherein said robotic work tool is configured to determine a proximity to a beacon marker () and to adapt its operation accordingly.

Obstacle detection for a robotic working tool

A robotic work tool system () comprising a signal generator (), a boundary wire () and a robotic work tool (), said boundary wire being adapted to demark a work area (), said signal generator () being arranged to transmit a control signal () through said boundary wire (), and said robotic work tool () comprising at least one sensor () for detecting said control signal () being transmitted through the boundary wire (). The robotic work tool system () is characterized in that said pulse signal () comprises at least one first pulse train () being transmitted at a first amplitude (C) and at least one second pulse train () being transmitted at a second amplitude (C), wherein said first amplitude (C) and second amplitude (C) being arranged so that said first amplitude (C) is greater than said amplitude level (C) and a sum of the amplitudes (C, C) for all pulse trains () over time falls below a threshold value.

Robotic working tool system with a boundary wire

A robotic work tool system (), comprising a charging station (), a boundary wire () and a signal generator () for generating and transmitting a signal through said boundary wire () for demarcating a work area (), said robotic work tool system () further comprising a robotic work tool () configured to detect a magnetic field strength (M, M) in the work area () and said robotic work tool system () being configured to adapt a current level of the signal being transmitted through the boundary wire () based on the detected magnetic field strength (M, M).

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Gränna, Sweden

Ludvig Sjöholm