Apparatus and method for tracking the flight of a golf ball

• US 5,342,051 A
• Filed: 10/30/1992
• Issued: 08/30/1994
• Est. Priority Date: 10/30/1992
• Status: Expired due to Term

• Current Assignee: Accusport International, Inc.
• Original Assignee: Accusport International, Inc.
• Inventors: Rankin, David B., Kluttz, James W., Roberts, Edgar P. Jr.
• Primary Examiner(s): Harrison, Jessica J.
• Assistant Examiner(s): Owens, Kerry
• Application Number:
  US07/968,994
• Time in Patent Office: 669 Days
• Field of Search: 273/35 R, 273/184 R, 273/185 R, 273/185 A, 273/183.1, 273/185 A, 273/185 B, 273/186.4, 273/32 B, 273/32 H, 434/252, 358/107, 358/105
• US Class Current: 473/199
• CPC Class Codes: A63B 2024/0034 during flight
• CPC Class Codes: A63B 2220/05 Image processing for measuring physical parameters
• CPC Class Codes: A63B 2220/805 Optical or opto-electronic sensors
• CPC Class Codes: A63B 2220/806 Video cameras
• CPC Class Codes: A63B 2220/807 Photo cameras
• CPC Class Codes: A63B 2220/808 Microphones
• 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 69/3658 Means associated with the ball for indicating or measuring, e.g. speed, direction

Abstract

The golf ball tracking apparatus has a video camera for producing data representative of video images of a golf ball, a video frame processor connected to receive data from the video camera for determining the golf ball image position within a video frame of the camera, a flight path predictor responsive to the video frame processor for predicting the flight path of the golf ball in response to data from the video frame processor, and a motion controller responsive to the flight path predictor for controlling the movement of the camera to thereby track the actual flight of the golf ball.

Claims

1. An apparatus for tracking a golf ball during actual flight, comprising;

a video camera for producing data representative of video images of a golf ball;

processing means connected to receive data from said video camera for determining the golf ball image position within a video frame of said camera;

predicting means responsive to said video frame processing means for predicting the flight path of the golf ball in response to data from said video frame processing means; and

motion control means responsive to said predicting means for controlling the movement of said camera to thereby track the golf ball during actual flight, said motion control means including means for mounting said camera for movement during actual flight of the golf ball.

2. The apparatus according to claim 1, further comprising an image control means for adjusting the focal length of a camera lens and for focusing the camera lens in response to said predicting means.

3. The apparatus according to claim 2, wherein said image control means comprises a zoom lens controller and a focusing controller of the camera.

4. The apparatus according to claim 1, wherein said processing means comprises:

identifying means for identifying the golf ball image within the video frame;

locating means for locating the image of the golf ball within the video frame; and

determining means for determining the size of the golf ball image within the video frame.

5. The apparatus according to claim 1, wherein said predicting means comprises:

flight determining means for determining flight velocity and acceleration of the golf ball;

short term predicting means for predicting where the ball should be in a subsequent video frame in response to the velocity and acceleration; and

signal generating means for generating a signal for adjusting the camera focus, zoom, and position in response to said predicting means.

6. The apparatus according to claim 1, further comprising actual flight path determining means for determining the actual golf ball flight path to be communicated to the golfer.

7. The apparatus according to claim 6, wherein said actual flight path determining means comprises:

distance determining means for determining an actual distance of travel of the golf ball; and

angular attitude determining means for determining an actual angular attitude of the golf ball.

8. The apparatus according to claim 1, wherein said means for mounting said camera for movement comprises a gimbal.

9. The apparatus according to claim 1, further comprising communication means for communicating actual flight path information to the golfer.

10. The apparatus according to claim 9, wherein said communication means comprises a display monitor and a communication link between said camera and said monitor.

11. An apparatus for evaluating a golf ball during actual flight, comprising:

a video camera for producing data representative of video images of a golf ball;

processing means connected to receive data from said video camera for determining the golf ball image position within a video frame of said camera;

predicting means responsive to said video frame processing means for predicting the flight path of the golf ball in response to data from said video frame processing means;

motion control means responsive to said predicting means for controlling the movement of said camera to thereby track the golf ball during actual flight, said motion control means including means for mounting said camera for movement during actual flight of the golf ball;

image control means responsive to said predicting means for adjusting the focal length of the camera lens and for focusing the camera lens on the golf ball; and

determining means responsive to said predicting means for determining the actual flight path of the golf ball.

12. The apparatus according to claim 11, wherein said image control means comprises a zoom lens controller and a focusing controller.

13. The apparatus according to claim 11, wherein said determining means comprises:

distance determining means for determining an actual distance of travel of the golf ball; and

angular attitude determining means for determining an actual angular attitude of the golf ball.

14. The apparatus according to claim 11, wherein said means for mounting said camera for movement comprises a gimbal.

15. The apparatus according to claim 11, further comprising communication means for communicating actual flight path information to the golfer.

16. The apparatus according to claim 15, wherein said communication means comprises a display monitor.

17. A method of tracking a golf ball during actual flight, comprising the steps of:

producing data representative of a video image of a golf ball during flight by use of a video camera;

predicting a flight path of a golf ball responsive to the data representative of the video image;

moving the video camera responsive to the predicted flight path during the actual flight of the golf ball thereby following the actual flight of the golf ball; and

adjusting the predicted flight path in response to the actual flight path of the golf ball.

18. The method according to claim 17, wherein said producing a video image step comprises the steps of:

locating the golf ball within a video frame;

locating the center of the golf ball within the video frame; and

determining the area of the ball in response to its location and center within the video frame.

19. The method according to claim 17, wherein said flight predicting step comprises the steps of:

determining the velocity and acceleration of the golf ball;

predicting the location of where the ball should be in a subsequent video frame; and

generating a signal for moving the camera in response to the predicted location.

20. A method of evaluating a golf ball during actual flight, comprising the steps of:

providing a video camera mounted for controlled horizontal and vertical motion;

producing data representative of a video image of a golf ball during flight by directing the video camera toward a struck golf ball;

predicting a flight path of a golf ball responsive to the data representative of the video image;

moving the video camera in response to the predicted flight path during the actual flight of the golf ball to thereby follow the actual flight of the golf ball;

adjusting the predicted flight path in response to the actual flight path of the golf ball; and

determining the actual flight path of the golf ball.

21. The method according to claim 20, wherein said producing a video image step comprises the steps of:

locating the golf ball within a video frame;

locating the center of the golf ball within the video frame; and

determining the area of the ball in response to its location and center within the video frame.

22. The method according to claim 20, wherein said flight predicting step comprises the steps of:

determining the velocity and acceleration of the golf ball;

predicting the location of where the ball should be the next video frame; and

generating a signal for moving the camera in response to the predicted location.

23. The method according to claim 20, further comprising the step of communicating the flight path of the golf ball to a golfer.