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Object recognition system for autonomous mobile body

  • US 8,793,069 B2
  • Filed: 04/02/2009
  • Issued: 07/29/2014
  • Est. Priority Date: 04/03/2008
  • Status: Active Grant
First Claim
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1. An object recognition system provided to an autonomous mobile body, comprising:

  • a sensor unit configured to detect an obstacle in a target field of view and measuring a position of the obstacle; and

    an electronic control unit configured tocontrol movement of the autonomous mobile body, determine velocity and travel direction of the obstacle based on changes in position of the obstacle obtained from the sensor unit over a plurality of measurement cycles, wherein the travel direction of the obstacle is determined based on a moving average of weighted velocity values of the obstacle over the plurality of measurement cycles,determine a still state of the obstacle,detect that the obstacle has changed behavior of the obstacle if a current velocity vector of the obstacle from the preceding position to the current position is out of a predetermined range of an angle from the travel direction that is determined at the preceding position, andwhen a change in the behavior of the obstacle is detected, calculate the velocity and the travel direction of the obstacle anew by not using, in subsequent computation of velocities and directions, travel data of the obstacle obtained before the position where the change has been detected and by starting computation of the velocities and the travel directions from the position where the change has been detected, wherein the travel direction of the obstacle calculated anew is determined based on a moving average of weighted velocity values of the obstacle over a plurality of measurement cycles.

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