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Navigation for a robotic working tool

  • US 10,136,576 B2
  • Filed: 11/12/2013
  • Issued: 11/27/2018
  • Est. Priority Date: 11/12/2013
  • Status: Active Grant
First Claim
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1. A robotic work tool system comprising:

  • a robotic work tool, said robotic work tool comprising;

    an electric motor powered by a battery and configured to drive a blade for lawn mowing;

    a position determining device for determining a current position of the robotic work tool,a controller configured to determine a mowing pattern based on the current position of the robotic work tool and configured to control movement of the robotic work tool to execute the mowing pattern;

    a deduced reckoning navigation sensor,wherein the controller is configured to determine that the current position is reliable based on a number of signals received by the position determining device, and, in response to determining that the current position is reliable, determine, via the controller, a calibrated interpretation of signals received from the deduced reckoning navigation sensor based on a position provided by the position determining device.

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