System and method for measuring a golfer's ball striking parameters

• US 20020098898A1
• Filed: 01/19/2001
• Published: 07/25/2002
• Est. Priority Date: 01/19/2001
• Status: Active Grant

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Manwaring, Scott R.
• Granted Patent: US 6,431,990 B1
• Time in Patent Office: Days
• US Class Current: 473/151
• CPC Class Codes: A63B 2024/0031 at the starting point
• CPC Class Codes: A63B 2220/05 Image processing for measuring physical parameters
• CPC Class Codes: A63B 2220/806 Video cameras
• CPC Class Codes: A63B 2220/807 Photo cameras
• CPC Class Codes: A63B 24/0003 Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
• CPC Class Codes: A63B 24/0021 Tracking a path or terminating locations
• CPC Class Codes: A63B 69/36 for golf
• CPC Class Codes: A63B 69/3658 Means associated with the ball for indicating or measuring, e.g. speed, direction

Abstract

A system (20) for capturing and analyzing golf club information and golf ball information during and after a golfer'"'"'s swing is disclosed herein. The golf club information includes golf club head orientation, golf club head velocity, and golf club spin. The golf club head orientation includes dynamic lie, loft and face angle of the golf club head. The golf club head velocity includes path of the golf club head, attack of the golf club head and downrange information. The golf ball information includes golf ball velocity, golf ball launch angle, golf ball side angle, golf ball speed manipulation and golf ball orientation. The golf ball orientation includes the true spin of the golf ball, and the tilt axis of the golf ball which entails the back spin and the side spin of the golf ball. The system includes camera units (26 and 28), a trigger device (30) and a computer (22).

Claims

1. A method for simultaneously measuring the golf club properties and the golf ball properties during a golfer'"'"'s striking of a golf ball, the method comprising:

swinging a golf club toward a teed golf ball;

activating a detector as the golf club is swung toward the teed golf ball, the detector transmitting an estimated golf club head speed to an imaging system, the imaging system capable of compiling a plurality of exposures to generate a frame;

taking a first plurality of exposures of the golf club head prior to the golf club head impacting the teed golf ball, the first plurality of exposures having a first time interval between exposures;

striking the teed golf ball with the golf club;

taking a second plurality of exposures of the golf ball after the golf ball has been struck by the golf club head, the second plurality of exposures having a second time interval between exposures, the second time interval different than the first time interval;

generating a frame that includes the first plurality of exposures of the golf club head prior to impact with the teed golf ball and the second plurality of exposures of the golf ball after impact with the golf club head;

wherein the method provides measurements of the golf club head and of the launched golf ball.

2. The method according to claim 1 wherein first time interval for the first plurality of exposures is shorter than second time interval for the second plurality of exposures.

3. The method according to claim 1 wherein first time interval for the first plurality of exposures ranges from 750 microseconds to 2000 microseconds, and the second time interval for the second plurality of exposures is greater than the first time interval.

4. The method according to claim 1 wherein the imaging system comprises a first camera and a second camera.

5. The method according to claim 1 wherein the frame comprises at least three exposures of the first plurality of exposures, and at least three exposures of the second plurality of exposures.

6. The method according to claim 1 wherein the measurements of the golf club comprise golf club head orientation, golf club head spin and golf club head velocity, and the measurements of the golf ball comprise the golf ball velocity, the golf ball launch angle, the golf ball side angle, the golf ball orientation and the golf ball speed.

7. The method according to claim 1 wherein the estimated golf club head speed is utilized to determine the first time interval of the first plurality of exposures and the second time interval of the second plurality of exposures.

8. The method according to claim 1 wherein each of the first plurality of exposures have a first exposure time, and each of the second plurality of exposures have a second exposure time, wherein the second exposure time is greater than the first exposure time.

9. The method according to claim 1 wherein a laser is utilized to activate the detector as the golf club is swung toward the teed golf ball.

10. A system simultaneously measuring the golf club properties and the golf ball properties during a golfer'"'"'s striking of a golf ball, the system comprising:

a first camera and a second camera, each of the first and second cameras focused toward a predetermined field view;

a golf club having at least one light contrasting area thereon;

a golf ball teed within the predetermined field of view;

a detector disposed prior the teed golf ball along a path of a golf club swing, the detector capable of estimating the golf club speed;

means for calculating a first time interval between a first plurality of exposures of the golf club and a second time interval between a second plurality of exposures of the launched golf ball based on the estimated golf club speed; and

means for determining the golf club swing properties and golf ball launch properties based on an image frame generated by the first and second cameras, the image frame comprising the first plurality of exposures and the second plurality of exposures.

11. The system according to claim 10 further comprising a first flash device for the first camera and a second flash device for the second camera.

12. The system according to claim 10 wherein the detector is a laser detector.

13. The system according to claim 10 wherein the detector is an audible detector.

14. The system according to claim 10 wherein the golf club has three highly reflective markers thereon.

15. The system according to claim 10 wherein the first time interval of the calculating means is less than the second time interval of the calculating means.

17. The method according to claim 16 wherein first time interval for the first plurality of exposures is less than second time interval for the second plurality of exposures.

18. The method according to claim 16 wherein first time interval for the first plurality of exposures ranges from 10 microseconds to 20 microseconds, and the second time interval for the second plurality of exposures is greater than the first time interval.

19. The method according to claim 16 wherein the imaging system comprises a first camera and a second camera.

20. The method according to claim 16 wherein the frame comprises at least three exposures of the first plurality of exposures, and at least three exposures of the second plurality of exposures.

16. A method for simultaneously measuring the golf club properties and the golf ball properties during a golfer'"'"'s striking of a golf ball, the method comprising:

swinging a golf club toward a teed golf ball;

triggering a detector as the golf club is swung toward the teed golf ball, the detector transmitting an estimated golf club head speed to an imaging system, the imaging system capable of compiling a plurality of exposures to generate a frame;

taking a first plurality of exposures of the golf club head prior to the golf club head impacting the teed golf ball, the first plurality of exposures having a first time interval for each exposure;

striking the teed golf ball with the golf club;

taking a second plurality of exposures of the golf ball after the golf ball has been struck by the golf club head, the second plurality of exposures having a second time interval for each exposure, the second time interval different than the first time interval;

generating a frame that includes the first plurality of exposures of the golf club head prior to impact with the teed golf ball and the second plurality of exposures of the golf ball after impact with the golf club head;

wherein the method provides measurements of the golf club head and of the launched golf ball.

21. A method for simultaneously measuring the golf club properties and the golf ball properties during a golfer'"'"'s striking of a golf ball, the method comprising:

swinging a golf club toward a teed golf ball;

triggering a detector as the golf club is swung toward the teed golf ball, the detector transmitting an estimated golf club head speed to an imaging system, the imaging system capable of compiling a plurality of exposures to generate a frame;

taking a first plurality of exposures of the golf club head prior to the golf club head impacting the teed golf ball, the first plurality of exposures having a first exposure intensity;

striking the teed golf ball with the golf club;

taking a second plurality of exposures of the golf ball after the golf ball has been struck by the golf club head, the second plurality of exposures having a second exposure intensity, the second exposure intensity different than the first exposure intensity;

generating a frame that includes the first plurality of exposures of the golf club head prior to impact with the teed golf ball and the second plurality of exposures of the golf ball after impact with the golf club head;

wherein the method provides measurements of the golf club head and of the launched golf ball.