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Apparatus for measuring parameters relating to the trajectory and/or motion of a moving article

  • US 20050130755A1
  • Filed: 01/31/2005
  • Published: 06/16/2005
  • Est. Priority Date: 10/19/1996
  • Status: Abandoned Application
First Claim
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1. Apparatus for measuring parameters relating to the trajectory and/or motion of a moving article, the apparatus comprising one or more light sources for providing light emitted from or reflected by the moving article in a known shape or pattern and one or more light sensing means, each light sensing means comprising one or more discrete sensors arranged to provide a signal when illuminated by said light, wherein the field of view of each light sensor or the illumination field of each light source defines a detection plane across the path of the moving article and narrower than the moving article and at least one of the light sensors is arranged to detect when the moving article intercepts a given detection plane, wherever the article intercepts the detection plane, and is arranged to sense variations in the said signal as the article passes through the detection plane and light from or reflected by different parts of the said known shape or pattern is detected, the arrangement being such that the position and orientation of the detection plane relative to a reference point is known or can be deduced from the signal provided by the said at least one light sensor and the position and/or orientation of the article relative to the detection plane can be determined from said variations in the said signal.

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