Method for predicting a golfer's ball striking performance
A method for a predicting golfer's performance is disclosed herein. The method inputs the pre-impact swing properties of a golfer obtained from a CMOS imaging system, a plurality of mass properties of a first golf club, and a plurality of mass properties of a first golf ball into a rigid body code. Ball launch parameters are generated from the rigid body. The ball launch parameters, a plurality of atmospheric conditions and lift and drag properties of the golf ball are inputted into a trajectory code. This trajectory code is used to predict the performance of a golf ball if struck by the golfer with the golf club under the atmospheric conditions. The method can then predict the performance of the golf ball if struck by the golfer with a different golf club. The method and system of the present invention predict the performance of the golf ball without the golfer actually striking the golf ball.
1. A method for predicting a golfer's ball striking performance, the method comprising:
determining a plurality of pre-impact swing properties for the golfer using at least one CMOS camera, the CMOS imaging system having a sensor array with at least one megapixel in size, wherein the CMOS imaging system forms a region of interest operating at a frame rate of 1000 to 4000 frames per second prior to the golf club entering the field of view and then forms subsequent regions of interest as the golf club travels through the field of view;
inputting a plurality of golf club properties for a first golf club head of a first golf club, the plurality of golf ball properties for a first golf ball, and the plurality of pre-impact swing properties into a rigid body code, wherein the plurality of golf ball properties comprises the mass of the first golf ball, the moment of inertia of the first golf ball and the radius of the first golf ball;
generating a plurality of ball launch parameters from the rigid body code;
inputting into a trajectory code a plurality of ball launch parameters, a plurality of first atmospheric conditions and a plurality of lift and drag properties for the first golf ball; and
generating a predicted performance from the trajectory code of the first golf ball if struck with the first golf club by the golfer under the plurality of first atmospheric conditions, wherein predicting the performance comprises at least one of predicting the trajectory shape, the trajectory apex, the dispersion of the golf ball, the flight distance of the golf ball and the roll distance of the golf ball.
2. The method according to claim 1 wherein the plurality of golf club head properties comprises the mass of the first golf club head, the location of the center of gravity of the first golf club head relative to the impact location of the first golf ball, the inertia tensor of the first golf club head, the geometry of the face of the first golf club head, the bulge and roll radii of the face of the first golf club head, the loft of the first golf club head and the face center location of the first golf club head.
3. The method according to claim 1 wherein the plurality of atmospheric conditions comprises the temperature, the pressure, the density of the air, the viscosity of the air, the relative humidity and the wind velocity.
4. The method according to claim 1 wherein the plurality of pre-impact properties comprises the impact location, the motion of the golf club head and the orientation of the golf club head.
5. The method according to claim 4 wherein the motion of the golf club head is provided as a three-orthogonal axes representation of velocity.
6. The method according to claim 4 wherein the motion of the golf club head is provided as speed and a directional vector represented by an elevation angle and an azimuth angle.
7. The method according to claim 1 wherein the plurality of ball launch parameters generated comprises a ball velocity and a ball angular velocity.
8. The method according to claim 1 wherein the plurality of ball launch parameters generated comprises a launch angle of the golf ball, a side angle of the golf ball, a golf ball speed, a spin of the golf ball and a spin axis of the golf ball.
9. The method according to claim 2 wherein the plurality of golf club head properties further comprises the coefficient of restitution of the first golf club head when striking the first golf ball, and a spin coefficient of restitution of the first golf club head when striking the first golf ball.
10. The method according to claim 1 wherein the plurality of golf ball properties further comprises the coefficient of restitution of the first golf ball at a speed of 143 feet per second.