Flight parameter measurement system

• US 7,292,711 B2
• Filed: 08/03/2004
• Issued: 11/06/2007
• Est. Priority Date: 06/06/2002
• Status: Active Grant

• Current Assignee: Wawgd Newco LLC
• Original Assignee: Wintriss Engineering Corporation
• Inventors: Kiraly, Christopher M., Wintriss, George Victor
• Primary Examiner(s): Mehta; Bhavesh M
• Assistant Examiner(s): KIM, CHONG R
• Application Number:
  US10/911,009
• Publication Number:
  US 20060008116A1
• Time in Patent Office: 1,190 Days
• Field of Search: None
• US Class Current: 382/103
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80
• CPC Class Codes: G06T 7/80 Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration

Abstract

A portable flight parameter measurement tracks the surface of an object in motion, e.g., a ball, and determines speed, trajectory, a spin axis, and a spin rate around that axis. The measurement system is particularly suited for analyzing the path of a ball in flight which is affected, in great part, by the amount of spin and the direction of spin imparted to the ball upon impact. The measurement system provides a user, such as a golfer, with important feedback for modifying his or her swing to obtain desired results. The measurement system utilizes non-precision marks, surface blemishes such as cuts made by a club, dimples, or a combination of all three as the only features necessary to determine ball flight characteristics.

Claims

1. A ball flight parameter measurement system, comprising:

a sensor adapted to capture a plurality of images of the ball in flight;

an alignment device is adapted to generate a misalignment signal based on the orientation of the alignment device relative to earth tangential;

an output device; and

a processor coupled to the alignment device, the sensor and the output device, operating the steps of;

receiving the plurality of images from the sensor;

receiving the misalignment signal from the electronic alignment device;

determining an alignment correction factor based on the misalignment signal to compensate for any difference between the current orientation of the sensor and a previously calibrated orientation;

calculating at least one ball flight parameter based on the plurality of images and the alignment correction factor; and

outputting the ball flight parameter on the output device.

2. The ball flight parameter measurement system according to claim 1, wherein the at least one flight parameter is launch elevation.

3. The ball flight parameter measurement system according to claim 1, wherein the at least one flight parameter is spin axis.

4. The ball flight parameter measurement system according to claim 1, wherein the alignment device is an accelerometer, an inclinometer, or an electronic level.

5. The ball flight parameter measurement system according to claim 1, further comprising:

an audio circuit;

the output device comprises a speaker; and

the processor further operates the step of converting the flight information to a digital voice signal, and

the audio circuit outputs the digital voice signal on the speaker.