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 (200), comprising a robotic work tool (100), said robotic work tool (100) comprising a controller (110) being configured to cause said robotic work tool (100) 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 (190), such as Global Navigation Satellite System device (190); determine that said received signals are not reliable, and in response thereto cause said robotic work tool (100) 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.
Claims13
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, 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 position determining device;
- determine that said received signals are not reliable, and in response thereto cause said robotic work tool to operate 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;
- and
- determine if a counter is lower than a threshold value when the received signals are reliable again and if so, cause the robotic work tool to execute a turn to re-enter a section where the received signals are not reliably received and increase the counter,
- wherein the controller is further configured to determine that the received signals are reliable again, and in response thereto switch to said first operating mode.
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, 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 position determining device;
- determine that said received signals are not reliable, and in response thereto cause said robotic work tool to operate 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;
- start a timer as said received signals are determined not to be reliable;
- and
- determine if the timer is lower than a threshold value when said received signals are reliable again and if so, cause said robotic work tool to execute a turn to re-enter a section where said received signals are not reliably received,
- wherein the controller is further configured to determine that the received signals are reliable again, and in response thereto switch to said first operating mode.
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, 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 position determining device;
- determine that said received signals are not reliable, and in response thereto cause said robotic work tool to operate 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;
- start to measure a distance traveled as said received signals are determined not to be reliable;
- and
- determine if the distance traveled is lower than a threshold value when said received signals received are reliable again and if so, cause said robotic work tool to execute a turn to re-enter a section where said received signals are not reliably received,
- wherein the controller is further configured to determine that the received signals are reliable again, and in response thereto switch to said first operating mode.
Dependencies are inferred from the claim text.