Robot confinement

  • US 8,686,679 B2
  • Filed: 12/14/2012
  • Issued: 04/01/2014
  • Est. Priority Date: 01/24/2001
  • Status: Active Grant
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First Claim
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1. A robot navigation system, comprising:

  • a robot having a signal receiver oriented in a manner to have an omnidirectional field of view and configured to receive both directed signals and diffuse signals;

    a portable barrier signal transmitting device for robot navigation, comprising;

    at least one signal emitter that emits a first, directed signal; and

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

    a control system configured to control one or more of the signal emitters, the control system being configured to;

    turn on one or both of the signal emitters in response to a signal received from the robot; and

    turn one or both of the signal emitters off after a predetermined amount of time.

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