Lawn care robot

  • US 10,037,038 B2
  • Filed: 04/28/2015
  • Issued: 07/31/2018
  • Est. Priority Date: 03/17/2006
  • Status: Active Grant
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First Claim
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1. A robot lawnmower comprising:

  • a drive system configured to maneuver the robot lawnmower across a lawn;

    a controller in communication with the drive system;

    a grass cutter;

    at least one obstacle sensor in communication with the controller and configured to detect surface phenomena indicating potential obstacles;

    a boundary responder detection system including a receiver unit configured to receive signals from active boundary responders;

    wherein the controller is configured to;

    operate in a check setup mode in which a user maneuvers the robot lawnmower to circumnavigate and approach a boundary and obstacles while the robot lawnmower is in manual mode, and topermit operation of the robot lawnmower in an autonomous mode in which the controller determines a location of the robot lawnmower based at least in part on a time-of-flight from one or more of the active boundary responders and only after the check setup mode is completed; and

    a user interface configured to provide notification during the check setup mode when the robot lawnmower detects surface phenomena indicated as water content detected by a water content sensor, as surface phenomena detected by a tilt sensor, or as loss of wheel contact detected by a wheel drop sensor.

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