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Velocity monitoring system for golf clubs

  • US 5,688,183 A
  • Filed: 03/21/1995
  • Issued: 11/18/1997
  • Est. Priority Date: 05/22/1992
  • Status: Expired due to Term
First Claim
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1. Apparatus for determining the velocity in the Z-plane of a golf club swung by a golfer, said club having a club head and a grip interconnected by a shaft, at the time of club head impact with a golf ball, comprising:

  • at least one acceleration sensor having an output responsive to its acceleration, said output being computed by a measurement taken before an impact time of the club head with the golf ball, said impact of said club head with said golf ball generating a noise reading which is used to determine a time of impact,a means for detachably securing said sensor to the hands or wrists of said golfer, to a golf gove worn by said golfer, to said grip, or to said shaft adjacent to said grip, and arranged to measure radial acceleration in the Z-plane; and

    a means utilizing the sensor output for computing and displaying an output representing said club head impact velocity based upon said sensor output, said means defining Rh as the radius of the club head from the center of rotation C, defining Rs as the radius of the sensor from C, and As as the output from the sensor, whereby the angular velocity of the club head is ω and

    is determined by the formula ω

    =√

    (As /Rs), and the speed of the club head (Vh) is determined by the formula Vh

    Rh =(Rh /√

    Rs)√

    As and Vh is displayed as the sensor output.

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