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Lawn mower robot system and method of controlling the same

  • US 9,237,689 B2
  • Filed: 08/02/2012
  • Issued: 01/19/2016
  • Est. Priority Date: 08/03/2011
  • Status: Active Grant
First Claim
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1. A lawn mower robot system, comprising:

  • a lawn mower robot with a moving device;

    a mowing device in the lawn mower robot for mowing lawns;

    a first communication device in the lawn mower robot for transmitting an inquiry signal for state information;

    a plurality of boundary display apparatuses, arranged in a lawn presence region, with a second communication device for receiving the inquiry signal for the state information from the first communication device and for transmitting an acknowledge signal for the state information to the first communication device; and

    a controller for recognizing a plurality of absolute coordinates from the lawn presence region based on the acknowledge signal for the state information received from the second communication device, for determining a current coordinate of the lawn mower based on the plurality of absolute coordinates, and for controlling the mowing device within a limit of the plurality of absolute coordinates based on the determined current coordinate and the plurality of absolute coordinates,wherein when the lawn mower robot is deviated from the limit of the plurality of absolute coordinates, the first communication device transmits an inquiry signal for state information to each of the plurality of boundary display apparatuses and receives an acknowledge signal for the state information for the inquiry signal for the state information from the second communication device; and

    wherein the controller recognizes a new absolute coordinate of the lawn mower robot from a lawn presence region when the first communication device receives the acknowledge signal for the state information from all the boundary display apparatuses.

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