Husqvarna Ab

Marcus Liljedahl

Mattias Kamfors

Beppe Hellsin

Stefan Grufman

Björn Mannefred

Fredrik Kallström

Tommy Glimberg

Jonas Holgersson

Jonas Rangsjö

Andreas Peterson

Patrik Jägenstedt

Fredrik Klackensjö

Stefan Bergström

Erik Starhagen

Claes Johannesson

Marcus Stjärnås

Hugo Johansson

Beppe Hesssin

Andreas Petersson

A robotic work tool system () comprising a robotic work tool () comprising a controller (), the controller () being configured to determine an area locality () associated with a hindrance; determine a classifier (C) associated with the area locality (); and determine an action for the robotic work tool (), wherein the action is based on the classifier (C).

Navigation for a robotic work tool

A robotic work tool system comprising at least one robotic work tool arranged to operate in a work area, the robotic work tool comprising at least one sensor and a communication interface, the robotic work tool being configured to establish a connection to a cloud service through said communication interface; receive data gathered by the at least one sensor and transmit the gathered data to the cloud service causing the cloud service to analyze the gathered data; receive operating data from the cloud service; and to operate at least one robotic work tool based on the operating data received from the cloud service.

Operation for a robotic work tool

A robotic work tool system () for defining a working area () in which at least one robotic work tool () subsequently is intended to operate. The system () comprises at least one controller () being configured to receive sensor data for pose estimation and event data relating to a plurality of events of at least one robotic work tool () moving within the working area (). The received sensor and event data are associated with each other in time. The controller () is configured to determine positions for the events based on the received sensor data associated with the respective event data and to determine features reflecting the working area () by relating positions associated with corresponding events with each other. The controller () is configured to adjust the determined positions based on the determined features by, for each feature, comparing the respective determined positions with each other; and determine, based on the adjusted positions, a map defining the working area ().

Robotic work tool system and method for defining a working area

A robotic work tool system () comprising a robotic work tool (), the robotic work tool () being configured to determine () that the robotic work tool () has entered a state of limited movement; determine () an exit path; and exit () the state of limited movement by navigating the exit path.

Exit path determination for a robotic work tool

A robotic work tool system () for avoiding trails from a robotic work tool () in a transit zone () in which the robotic work tool () is allowed to travel from a start point () to a goal point () along a travel path (). The system () comprises at least one memory () configured to store information about the transit zone (), at least one robotic work tool () configured to travel along the travel path () and at least one controller () for controlling operation of the robotic work tool (). The controller () is configured to receive, from the memory (), information about the transit zone () and generate, based on the transit zone (), the travel path () for the robotic work tool () from the start point () to the goal point (). The generated travel path () is configured to differ from previously generated travel paths.

Robotic work tool system and method for transporting a robotic work tool between different areas

A robotic lawnmower system comprising a charging station () and a robotic work tool (), the charging station comprising a signal generator () to which a boundary cable () is to be connected, the signal generator () being configured to transmit a signal () through the boundary cable (), and the robotic working tool () comprising a sensor () configured to pick up magnetic fields generated by the signal () in the boundary cable () thereby receiving the signal () being transmitted and a controller () configured to analyse the picked up signal, wherein the signal generator () is further configured to: prefilter the signal through an filter model; and transmit the prefiltered signal to through the boundary cable () by means of a current generator.

Reception of frequency spectra on the receiver side

A robotic lawnmower system comprising a robotic lawnmower () and a signal generator () to which a cable () is to be connected, the signal generator () being configured to transmit a signal () through the cable (). The robotic lawnmower () comprises: a sensor () configured to pick up magnetic fields generated by the signal () in the cable () thereby receiving the signal () being transmitted and a controller (). The controller () is configured to follow the cable () at a distance by determining a received signal quality level and adapting the distance at which the robotic lawnmower () is following the cable at according to the determined signal quality level.

Reduction of wheel tracks for robotic lawnmower

A robotic lawnmower system comprising a signal generator (), a boundary cable, at least one guide cable () and a robotic lawnmower (), said signal generator being configured to transmit a control signal through said boundary cable and a guide signal through said at least one guide cable, and wherein said robotic lawnmower comprises a controller () and at least one sensor (), wherein the controller is configured for receiving said control signal through said at least one sensor (') and determining a signal level for the control signal; and if the signal level for the control signal is below a threshold value, the controller () is configured to receive said guide signal and to synchronize on said guide signal.

Compensating for stray capacitances for a robotic lawnmower

A robotic lawnmower system, comprising a charging station comprising a controller said controller being configured to associate a time slot for use to transmit a guide signal, and a robotic lawnmower, wherein said controller is configured to detect if a guide cable is connected to the charging station or not, and if not, allot said associated time slot to another use.

Adaptive signal transmission

A robotic lawnmower system, comprising a robotic lawnmower and a charging station, said charging station comprising a signal generator being configured to transmit a boundary signal (A) utilizing CDMA coding having a frame length corresponding to a full frame length through a boundary wire, wherein said signal generator is configured to transmit said boundary signal in subframes, and wherein said robotic lawnmower is configured to receive said boundary signal by detecting magnetic fields generated by the boundary signal, and wherein the robotic lawnmower is configured to determine a set of conditions; and to determine if said set of conditions correspond to a first set of conditions, and if so listen to the subframes, and to determine if said set of conditions correspond to a second set of conditions, and if so listen to the full frames.

Growing community of inventors

Huskvarna, Sweden

Marcus Liljedahl