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Electronic pitching trainer and method for determining the true speed of a sports projectile

  • US 8,001,838 B2
  • Filed: 08/05/2008
  • Issued: 08/23/2011
  • Est. Priority Date: 08/07/2007
  • Status: Active Grant
First Claim
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1. An automated method for determining an estimate of a speed of a sports projectile at a time of interest, the method comprising:

  • (A) measuring first data, the first data indicating a first range-rate value corresponding to a first time and comprising the time rate of change in the length of a first path, wherein the first path comprises a first line from an emitting means at a first fixed point to said sports projectile and a second line from said projectile to a sensing means at a second fixed point, wherein the first and second fixed points are fixed in relation to a target means provided for the sports projectile;

    (B) measuring second data, the second data indicating a second range-rate value corresponding to a second time and comprising the time rate of change in the length of a second path, wherein the second path comprises a third line from the emitting means at the first fixed point to said sports projectile and a fourth line from said projectile to the sensing means at the second fixed point, wherein the first time differs from the second time; and

    (C) estimating the speed of the sports projectile at the time of interest based on the first range-rate value, the first time, the second range-rate value, and the second time.

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