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Autonomous machine

  • US 7,053,580 B2
  • Filed: 10/31/2002
  • Issued: 05/30/2006
  • Est. Priority Date: 11/03/2001
  • Status: Expired due to Fees
First Claim
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1. An autonomous machine comprising:

  • a driving mechanism for moving the machine along a surface of an area, anda navigation system, comprising a memory element, for navigating the machine around the area,the navigation system comprising;

    a boundary following unit causing the machine to follow a boundary of the area and storing path information taken at regular intervals spaced by an equal predetermined distance from one another on the path travelled by the machine as the machine follows the boundary; and

    a comparator determining when the machine has returned to a previously visited position in the area, the comparator being configured to compare the latest section of the path travelled by the machine with information representing a section of the path previously stored in the memory, and deciding when the new path information and previously stored path information are substantially the same.

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