Please download the dossier by clicking on the dossier button x
×

Determination of spin parameters of a sports ball

  • US 10,393,870 B2
  • Filed: 03/17/2017
  • Issued: 08/27/2019
  • Est. Priority Date: 03/03/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method for estimating a spin frequency of a rotating sports ball in flight, comprising:

  • receiving, using a receiver of a radar arrangement, electromagnetic waves reflected from the rotating sports ball;

    deriving, without regard to any marking on the rotating sports ball, from the received electromagnetic waves, via the radar arrangement, a signal having a first frequency corresponding to a velocity of the rotating sports ball, the signal being modulated by a modulation frequency; and

    estimating, without regard to any marking on the rotating sports ball, via the radar arrangement, at at least a single point in time, the spin frequency of the rotating sports ball based on at least one frequency distance between a harmonic of the modulation frequency and one of the first frequency and an additional harmonic of the modulation frequency.

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