Patent ID: 8192295

Claim:
A system for evaluating a spin of a moving golf ball that is struck with a golf club, the system comprising: a golf ball comprising: a golf ball body; a motion sensor disposed within the golf ball body and configured to measure acceleration of the golf ball along each of three mutually perpendicular axis; a processor disposed within the golf ball body and configured to determine spin of the golf ball based upon the acceleration measured by the motion sensor, the processor further configured to determine the backspin of the golf ball based upon a time rate of angular rotation of an acceleration vector about a horizontal axis; and a transmitter disposed within the golf ball body configured to transmit data representative of spin of the golf ball; and a display device comprising: a receiver configured to receive data representative of the spin of the golf ball from transmitter; a display configured to provide a representation of a measure of the spin of the golf ball, wherein at least one of the golf ball and the display device comprises a processor configured to determine the spin of the golf ball based upon the acceleration measured by the motion sensor.