Method and apparatus for determining the alignment of motor vehicle wheels

CAFC
  • US 5,724,743 A
  • Filed: 10/10/1995
  • Issued: 03/10/1998
  • Est. Priority Date: 09/04/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for determining the alignment of motor vehicle wheels comprising:

  • target means including at least first and second target objects for attachment to wheels on respective first and second sides of a vehicle under inspection, each said target object including a plurality of visually perceptible, geometrically configured target elements having known geometric characteristics and positional interrelationships;

    optical inspection means defining a spatial reference system and including first and second cameras respectively forming first and second viewing paths intersecting said first and second target objects when they are attached to wheels of a vehicle under inspection, each said camera being operable to inspect an image of a corresponding target object as viewed along its corresponding viewing path and to generate image information describing the geometric characteristics and positional interrelationships of the imaged target elements;

    processing means for relating such image information to predetermined reference information describing the known geometric characteristics and positional interrelationships of said target elements and for determining the position and angular orientation of said first and second target objects relative to said spatial reference system and generating first and second position and orientation information commensurate therewith; and

    means responsive to said first and second position and orientation information and operative to indicate the position and alignment of the wheels to which said first and second targets are attached.

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