Navigation for a robotic working tool
AssigneeHusqvarna AB
InventorsPeter Reigo, Patrik Jägenstedt, Magnus Öhrlund
Life of this patent
Estimating the term…
Abstract
A robotic work tool system, comprising a robotic work tool, said robotic work tool comprising a controller being configured to cause said robotic work tool to operate in a first operating mode, which first operating mode is based on a current position, said current position being determined based on signals received from a position determining device, such as Global Navigation Satellite System device; determine that said received signals are not reliable, and in response thereto cause said robotic work tool to operate according to second operating mode, which second operating mode is not based on a current position being determined based on said received signals.
Claims16
A robotic lawnmower system comprising a robotic lawnmower, said robotic lawnmower comprising a controller being configured to:
- cause the robotic lawnmower to navigate a work area to execute a mowing pattern on the work area in a first operating mode, wherein the first operating mode is based on a current position, said current position being determined based on received signals that are received from a Global Navigation Satellite System device;
- determine that said received signals are not reliable, and in response thereto cause said robotic lawnmower to navigate the work area according to a second operating mode, wherein the second operating mode is not based on a current position being determined based on said received signals;
- determine that said received signals are reliable again, and in response thereto switch to said first operating mode;
- and
- determine if a counter is lower than a threshold value when said received signals are reliable again and if so, cause said robotic lawnmower to execute a turn to re-enter a section where said signals are not reliably received and increase said counter.
A robotic lawnmower system comprising a robotic lawnmower, said robotic lawnmower comprising a controller being configured to:
- cause the robotic lawnmower to navigate a work area to execute a mowing pattern on the work area in a first operating mode, wherein the first operating mode is based on a current position, said current position being determined based on received signals that are received from a Global Navigation Satellite System device;
- determine that said received signals are not reliable, and in response thereto cause said robotic lawnmower to navigate the work area according to a second operating mode, wherein the second operating mode is not based on a current position being determined based on said received signals;
- measure a distance traveled as said signals are determined not to be reliable;
- determine that said received signals are reliable again, and in response thereto switch to said first operating mode;
- and
- determine if the distance traveled is lower than a threshold value when said received signals are reliable again and if so, cause said robotic lawnmower to execute a turn to re-enter a section where said signals are not reliably received.
A method for use in a robotic lawnmower system comprising a robotic lawnmower, said method comprising:
- causing said robotic lawnmower to navigate a work area to execute a mowing pattern on the work area in a first operating mode, which first operating mode is based on a current position, said current position being determined based on signals received from a Global Navigation Satellite System device;
- determining that said received signals are not reliable, and in response thereto causing said robotic lawnmower to navigate the work area according to second operating mode, which second operating mode is not based on a current position being determined based on said received signal;
- storing a map and adapting operation of the robotic lawnmower based on a current position in the work area based on the map;
- and
- updating the map each time the robotic lawnmower leaves or enters a blackout area.
Dependencies are inferred from the claim text.