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 virtual golf simulation apparatus for providing an image simulating a motion of a golf ball hit by a user's golf swing, the apparatus comprising:

• a sensor configured to detect a motion of a golf club and a motion of the golf ball moved by the user's golf shot using the golf club, including:
• a camera configured to consecutively acquire images of the motion of the golf club and the golf ball during a time period including an impact time at which the golf ball is hit by a head of the golf club;
• and
• a sensing processor configured to analyze the acquired images to obtain positions information of the golf ball and the head of the golf club in each of the images and to obtain motion parameters of the golf club and motion parameters of the golf ball using the positions information of the golf ball and the head of the golf club,
• a reference DB configured to store premeasured data for spins of golf balls moved by golf shots corresponding to golf clubs' motion parameters and golf balls' motion parameters in a form of a database;
• and
• a simulator comprising a spin processor, a data storage, an image processor, and a display,
• the simulator configured to provide a simulation image which simulates the motion of the golf ball hit by applying the motion parameters of the golf ball obtained by the sensing processor and the spin calculated by the spin processor,
• the spin processor configured to obtain a spin of the moving golf ball detected by the sensor using the reference DB′ premeasured data for spins corresponding to the motion parameters of the golf club and the golf ball obtained by the sensing processor,
• the data storage configured to store an image data based on the spin of the moving golf ball obtained by the spin processor,
• the image processor configured to generate the image simulating the motion of the golf ball based on the image data stored in the data storage, and
• the display configured to display a simulation image generated by the image processor,
• wherein the sensing processor is configured to obtain an angle of attack, which is an angle at which the head of the golf club contacts the golf ball at an impact time and a speed of the head of the golf club as the motion parameters of the golf club, and obtain a launch angle of the golf ball as the motion parameters of the golf ball, and
• wherein the reference DB is configured to store database type information about values of the angle of attack premeasured as the golf clubs' motion parameters, about values of a dynamic loft, which is a loft of a face of a head of a golf club at an impact time corresponding to a launch angle according to impact, premeasured as the golf balls' motion parameters, and
• to store database type information about values of a back spin of a golf ball corresponding to the dynamic loft with respect to predetermined value of a head speed of a golf club, wherein the values of the back spin of the golf ball are premeasured corresponding to values of the dynamic loft,
• wherein the spin processor is configured to:
• determine a value of the dynamic loft corresponding to the obtained angle of attack of the golf club and the obtained launch angle of the golf ball with reference to the reference DB, and
• determine a value of the back spin corresponding to the determined value of the dynamic loft and the obtained head speed of the golf club with reference to the reference DB,
• wherein the spin processor is configured to:
• determine a ball motion vector based on the obtained launch angle of the golf ball, the obtained direction of the golf ball, and the obtained speed of the golf ball,
• determine a club motion vector based on the obtained angle of attack, the obtained swing direction, and the obtained head speed of the golf club, and
• calculate a spin axis about which the golf ball spins using the determined ball motion vector and the determined club motion vector according to predetermined conditions,
• wherein the spin processor is configured to calculate a value of a side spin of the golf ball using information about the determined value of the back spin of the ball and the calculated spin axis according to a predetermined functional relationship.