Apparatus and method for tracking the flight of a golf ball

• US 5,489,099 A
• Filed: 08/29/1994
• Issued: 02/06/1996
• 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., Roberts, Edgar P. Jr., Kluttz, James W.
• Primary Examiner(s): Harrison, Jessica J.
• Assistant Examiner(s): SCHAAF, JAMES CHARLES
• Application Number:
  US08/297,645
• Time in Patent Office: 526 Days
• Field of Search: 273/183.1, 273/184 R, 273/185 R, 273/35 R, 273/213, 273/185 A, 273/32 B, 348/157, 434/252
• 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 evaluating the complete flight path of a golf ball during actual flight, comprising:

a video camera positioned for producing data representative of video images of a complete flight path of a golf ball;

processing means connected to receive data from said video camera for determining a 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;

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.

2. The apparatus according to claim 1, wherein said image control means comprises a zoom lens controller and a focusing controller.

3. The apparatus according to claim 1, 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.

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

5. The apparatus according to claim 4, wherein said communication means comprises a display monitor.

6. 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 actual flight by use of a video camera;

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

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

7. The method according to claim 6, 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.

8. The method according to claim 6, wherein said flight predicting step comprises the steps of:

determining the velocity and acceleration of the golf ball; and

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

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

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

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

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.

10. The method according to claim 9, 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.

11. The method according to claim 9, 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.

12. The method according to claim 9, further comprising the step of communicating the flight path of the golf ball to a golfer.