Method for predicting a golfer's ball striking performance

• US 20050070366A1
• Filed: 11/15/2004
• Published: 03/31/2005
• Est. Priority Date: 12/21/2001
• Status: Active Grant

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Manwaring, Scott R., Fan, Frank H., Ligotti, Peter III
• Granted Patent: US 6,929,558 B2
• Time in Patent Office: Days
• US Class Current: 473/198
• CPC Class Codes: A63B 69/3605 Golf club selection aids informing player of his average or expected shot distance for each club

Abstract

A system for a predicting golfer'"'"'s performance is disclosed herein. The system inputs the pre-impact swing properties of a golfer, a plurality of mass properties of a first golf club, and a plurality of mass properties of a first golf ball into a rigid body code. Ball launch parameters are generated from the rigid body. The ball launch parameters, a plurality of atmospheric conditions and lift and drag properties of the golf ball are inputted into a trajectory code. This trajectory code is used to predict the performance of a golf ball if struck by the golfer with the golf club under the atmospheric conditions. The system can then predict the performance of the golf ball if struck by the golfer with a different golf club. The system of the present invention predicts the performance of the golf ball without the golfer actually striking the golf ball.

Claims

1. A system for predicting a golfer'"'"'s ball striking performance, the system comprising:

a plurality of cameras, each of the plurality of cameras focused on a field of view, the field of view including a golf ball;

a golf club having means for providing a true golf club head orientation at a moment of time prior to impact with the golf ball in the field of view;

means for triggering the activation of each of the plurality of cameras prior to the golf club impacting the golf ball;

means for determining a plurality of pre-impact swing properties for the golfer based on the golfer'"'"'s swing with the golf club;

means for generating a plurality of ball launch parameters from a plurality of club head properties of the golf club, a plurality of ball properties of a golf ball, and the plurality of pre-impact swing properties;

means for inputting into a trajectory code the plurality of ball launch parameters, a plurality of atmospheric conditions, and a plurality of lift and drag properties for the golf ball; and

means for generating a predicted performance from the trajectory code of the golf ball if struck with the golf club by the golfer under the atmospheric conditions.

2. The system according to claim 1 wherein the plurality of pre-impact swing properties comprises a predicted impact location of the golf club head with the golf ball, an angular velocity of the golf club, a linear velocity of the golf club, and a true orientation of the golf club head.

3. The system according to claim 1 wherein the plurality of golf club head properties comprises a plurality of face properties of the golf club head and a plurality of mass properties of the golf club head.

4. The system according to claim 1 wherein the plurality of ball properties comprises a mass of the golf ball, a radius of the golf ball, a moment of inertia of the golf ball and a coefficient of restitution of the golf ball.

5. The system according to claim 3 wherein the plurality of face properties comprises a face geometry, a face center, a bulge radius and a roll radius, and wherein the plurality of mass properties comprises an inertial tensor, a mass of the club head and a center of gravity location.

6. The system according to claim 1 wherein the plurality of ball launch parameters comprises a ball speed, linear and angular velocities, launch and side angles of the golf ball, a ball spin and a spin axis of the golf ball.

7. The system according to claim 1 wherein the means for generating a predicted performance comprises means for predicting a trajectory shape, a trajectory apex, flight and roll distances of the golf ball, and a dispersion of the golf ball.

8. The system according to claim 1 wherein each of the plurality of cameras is a charged coupled device camera.

9. The system according to claim 1 wherein the triggering means is a laser device comprising a transmitter and receiver.

10. The system according to claim 1 wherein the means for providing a true golf club head orientation is a plurality of highly reflective markers positioned on the golf club.

11. A system for predicting a golfer'"'"'s ball striking performance, the system comprising:

a plurality of cameras, each of the plurality of cameras focused on a field of view, the field of view including a golf ball;

a golf club having means for providing a true golf club head orientation at a moment of time prior to impact with the golf ball in the field of view;

means for triggering the activation of each of the plurality of cameras prior to the golf club impacting the golf ball;

means for determining a plurality of pre-impact swing properties for the golfer based on the golfer'"'"'s swing with the golf club;

means for generating a plurality of ball launch parameters from a plurality of club head properties of at least one golf club of a plurality of golf clubs, a plurality of ball properties of at least one golf ball of a plurality of golf balls, and the plurality of pre-impact swing properties;

means for inputting into a trajectory code the plurality of ball launch parameters, a plurality of atmospheric conditions, and a plurality of lift and drag properties for the at least one golf ball of the plurality of golf balls; and

means for generating a predicted performance from the trajectory code of the at least one golf ball of the plurality of golf balls if struck with the at least one golf club of the plurality of golf clubs by the golfer under the atmospheric conditions.

12. The system according to claim 11 further comprising:

means for generating a plurality of ball launch parameters from a plurality of club head properties of a second golf club of the plurality of golf clubs, the plurality of ball properties of the at least one golf ball of the plurality of golf balls, and the plurality of pre-impact swing properties;

means for inputting into a trajectory code the plurality of ball launch parameters, the plurality of atmospheric conditions, and the plurality of lift and drag properties for the at least one golf ball of the plurality of golf balls; and

means for generating a predicted performance from the trajectory code of the at least one golf ball of the plurality of golf balls if struck with the second golf club of the plurality of golf clubs by the golfer under the atmospheric conditions.

13. The system according to claim 11 further comprising:

means for generating a plurality of ball launch parameters from a plurality of club head properties of the at least one golf club of the plurality of golf clubs, a plurality of ball properties of a second golf ball of the plurality of golf balls, and the plurality of pre-impact swing properties;

means for inputting into a trajectory code the plurality of ball launch parameters, the plurality of atmospheric conditions, and a plurality of lift and drag properties for the second golf ball of the plurality of golf balls; and

means for generating a predicted performance from the trajectory code of the second golf ball of the plurality of golf balls if struck with the at least one golf club of the plurality of golf clubs by the golfer under the atmospheric conditions.

14. A system for predicting a golfer'"'"'s ball striking performance, the system comprising:

a plurality of cameras, each of the plurality of cameras focused on a field of view, the field of view including a golf ball;

a golf club having means for providing a true golf club head orientation at a moment of time prior to impact with the golf ball in the field of view;

means for triggering the activation of each of the plurality of cameras prior to the golf club impacting the golf ball; and

means for using a rigid body code to predict a golfer'"'"'s ball striking performance.