Robot navigation

  • US 7,567,052 B2
  • Filed: 10/30/2007
  • Issued: 07/28/2009
  • Est. Priority Date: 01/24/2001
  • Status: Active Grant
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First Claim
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1. A directed beam emitter system for robot navigation, comprising:

  • at least one light beam emitter that emits a modulated directed light beam of a first modulation; and

    at least one omnidirectional diffuse light region emitter that emits a modulated diffuse light region of a second modulation,the modulated directed light beam and the modulated diffuse light region overlapping in a plane parallel to ground level such that a light beam receiver on a robot may detect either one or both of the modulated directed light beam and the modulated diffuse light region; and

    wherein the light beam emitter is responsive to a control system used to control one or more light beam emitters.

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