×

Object detection system and object detection method

  • US 8,243,288 B2
  • Filed: 07/19/2010
  • Issued: 08/14/2012
  • Est. Priority Date: 07/27/2009
  • Status: Expired due to Fees
First Claim
Patent Images

1. An object detection system comprising:

  • light radiation means for radiating light of a two-dimensional pattern to an object;

    light sweeping means for carrying out a sweeping operation by continuously changing the radiation direction of said light of a two-dimensional pattern within a space determined in advance;

    light reflection means attached to a predetermined location on said object to serve as a detection subject and used for reflecting said light of a two-dimensional pattern in a direction opposite to said radiation direction of said light of a two-dimensional pattern;

    reflected-light detection means for detecting said light reflected by said light reflection means to appear as light arriving at said reflected-light detection means; and

    reflected-light analysis means for computing vertical-direction and horizontal-direction angles on the basis of a signal representing said reflected light detected by said reflected-light detection means,wherein,said two-dimensional pattern is configured to include code series generated by using two-dimensional M-sequence random numbers indicating the nonexistence and existence of a square pattern,said reflected-light analysis means computes;

    one of said vertical-direction and horizontal-direction angles of said light reflection means by identifying said code series, and the other vertical-direction and horizontal-direction angle of said light reflection means by detecting a phase shift of said identified code series.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×