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Golfer's impact properties during a golf swingRelated Patent Categories: Games Using Tangible Projectile, Golf, Club Selection, Ball Direction, Or Distance Indicating AidGolfer's impact properties during a golf swing description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080020867, Golfer's impact properties during a golf swing. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCES TO RELATED APPLICATIONS [0001] The present application is a continuation application of U.S. patent application Ser. No. 10/843,782, filed on May 11, 2004, which claims priority to U.S. Provisional Application No. 60/498,796, filed on Aug. 28, 2003. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates to a method for determining a golfer's impact properties for a golf swing. More specifically, the present invention relates to a method for determining a golfer's golf club head orientation and impact location for a golf swing. [0005] 2. Description of the Related Art [0006] For over twenty-five years, high speed camera technology has been used for gathering information on a golfer's swing. The information has varied from simple club head speed to the spin of the golf ball after impact with a certain golf club. Over the years, this information has fostered numerous improvements in golf clubs and golf balls, and assisted golfers in choosing golf clubs and golf balls that improve their game. Additionally, systems incorporating such high speed camera technology have been used in teaching golfers how to improve their swing when using a given golf club. [0007] An example of such a system is U.S. Pat. No. 4,063,259 to Lynch et al., for a Method Of Matching Golfer With Golf Ball, Golf Club, Or Style Of Play, which was filed in 1975. Lynch discloses a system that provides golf ball launch measurements through use of a shuttered camera that is activated when a club head breaks a beam of light that activates the flashing of a light source to provide stop action of the club head and golf ball on a camera film. The golf ball launch measurements retrieved by the Lynch system include initial velocity, initial spin velocity and launch angle. [0008] Another example is U.S. Pat. No. 4,136,387 to Sullivan, et al., for a Golf Club Impact And Golf Ball Launching Monitoring System, which was filed in 1977. Sullivan discloses a system that not only provides golf ball launch measurements, it also provides measurements on the golf club. [0009] Yet another example is a family of patents to Gobush et al.,: U.S. Pat. No. 5,471,383 filed on Sep. 30, 1994; U.S. Pat. No. 5,501,463 filed on Feb. 24, 1994; U.S. Pat. No. 5,575,719 filed on Aug. 1, 1995; and U.S. Pat. No. 5,803,823 filed on Nov. 18, 1996. This family of patents discloses a system that has two cameras angled toward each other, a golf ball with reflective markers, a golf club with reflective markers thereon and a computer. The system allows for measurement of the golf club or golf ball separately, based on the plotting of points. [0010] Yet another example is U.S. Pat. No. 6,042,483 for a Method Of Measuring Motion Of A Golf Ball. The patent discloses a system that uses three cameras, an optical sensor means, and strobes to obtain golf club and golf ball information. [0011] The prior disclosures and most launch monitors, however, fail to disclose a system and method that determine the impact location and golf club head orientation during a golfer's swing. BRIEF SUMMARY OF THE INVENTION [0012] The present invention is a method that allows for determining the impact location and golf club head orientation during a golfer's swing based on information obtained during a golfer's swing and measured inherent properties of a golf ball and golf club. The present invention uses an optimization method such as the Powell Optimization method or the Nelder & Mead Simplex optimization method to obtain the impact location and golf club head orientation. [0013] One aspect of the present invention is a method for determining a golfer's impact properties during a golf swing. The method includes providing a plurality of golf club head properties for a golf club, a plurality of golf ball properties for a golf ball, and a first optimization value including an orientation of the golf club head during impact with a golf ball and an impact location of the golf ball on the golf club head. The method also includes measuring an angular velocity of the golf club and the linear velocity of the golf club during the golfer's swing, and a plurality of actual ball launch parameters. The method also includes inputting the plurality of golf club properties, the plurality of golf ball properties, the angular velocity of the golf club, the linear velocity of the golf club, and the first optimization value into a rigid body code. The method also includes generating a plurality of calculated ball launch parameters from the rigid body code. The method also includes verifying the accuracy of the plurality of calculated ball launch parameters. [0014] Another aspect of the present invention is using the impact properties obtained through an optimization method to predict a golfer's ball striking performance. The method includes providing a plurality of golf club head properties for a first golf club, a plurality of golf ball properties for a first golf ball, and a first optimization value including an orientation of the golf club head during impact with a golf ball and an impact location of the golf ball on the golf club head. The method also includes measuring an angular velocity of the golf club and the linear velocity of the golf club during the golfer's swing, and a plurality of actual ball launch parameters. The method also includes inputting the plurality of golf club properties, the plurality of golf ball properties, the angular velocity of the golf club, the linear velocity of the golf club, and the first optimization value into a rigid body code. The method also includes generating a first plurality of ball launch parameters from the rigid body code for the first golf ball. The method also includes inputting the first plurality of ball launch parameters, a plurality of atmospheric conditions and a plurality of lift and drag properties for the first golf ball into a trajectory code. The method also includes generating the performance from the trajectory code of the first golf ball if struck by the golfer with the first golf club under the plurality of atmospheric conditions. The method also includes inputting a plurality of mass properties of a second golf club, the plurality of mass properties of the first golf ball, the angular velocity of the golf club, the linear velocity of the golf club, orientation of the golf club head during impact with a golf ball, and the impact location of a golf ball on the golf club head into the rigid body code. The method also includes generating a second plurality of ball launch parameters from the rigid body code. The method also includes inputting the second plurality of ball launch parameters, the plurality of atmospheric conditions and the plurality of lift and drag properties for the first golf ball into the trajectory code. The method also includes generating the performance from the trajectory code of the first golf ball if struck by the golfer with the second golf club under the first atmospheric conditions. The method also includes inputting the plurality of mass properties of the first golf club, a plurality of mass properties of a second golf ball the angular velocity of the golf club, the linear velocity of the golf club, orientation of the golf club head during impact with a golf ball, and the impact location of a golf ball on the golf club head into the rigid body code. The method also includes generating a third plurality of ball launch parameters from the rigid body code. The method also includes inputting the third plurality of ball launch parameters, the plurality of atmospheric conditions and a plurality of lift and drag properties for the second golf ball into the trajectory code. The method also includes generating the performance from the trajectory code of the second golf ball if struck by the golfer with the first golf club under the atmospheric conditions. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS [0015] FIG. 1 is a flow chart of the general method of the present invention. [0016] FIG. 2 is a flow chart illustrating the inputs for the measured values. [0017] FIG. 3 is a flow chart illustrating the inputs for the golf club swing properties. [0018] FIG. 4 is a flow chart illustrating the inputs for the measured golf ball inherent properties. [0019] FIG. 5 is a flow chart illustrating the inputs for the measured golf club head inherent properties. Continue reading about Golfer's impact properties during a golf swing... 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