Device for calculating flight information of ball, method of calculating flight information of ball, and computing-device-readable recording medium having the method recorded therein

A computer-implemented calculation method for calculating flight information of a golf ball that is hit using a golf club, the calculation method comprising:

• sensing, by a sensor, a golf club motion and a golf ball motion that is hit using the golf club and transmitting the sensed golf club motion and the sensed golf ball motion to a processor;
• calculating, by the processor, a motion parameter of the golf club and a motion parameter of the golf ball based on the sensed golf club motion and the sensed golf ball motion;
• and
• calculating, by the processor, a spin information of the golf ball corresponding to the calculated motion parameter of the golf ball using a reference DB for storing values necessary to calculate the spin information of the golf ball as premeasured values of components corresponding to various values of the motion parameter of the golf ball in the form of a database,
• wherein the reference DB stores database type information about a value of a dynamic loft, which is a loft of a face of a golf club head at a time of impact corresponding to various values of an attack angle and a launch angle, the value of the dynamic loft being premeasured, and stores database type information about values of a golf ball back spin corresponding to various values of the dynamic loft with respect to various predetermined values of a golf club head speed, the values of the golf ball back spin being premeasured,
• wherein the step of calculating the spin information of the golf ball comprises:
• calculating, by the processor, a value of the dynamic loft corresponding to the calculated attack angle and to the calculated launch angle with reference to the reference DB;
• and
• calculating, by the processor, a value of the golf ball back spin corresponding to the calculated value of the dynamic loft and the calculated golf club head speed with reference to the reference DB.