IoTボールの計測結果に基づく硬式野球ボールの空力特性

抄録

In the recent study, it was revealed that the throw trajectory is changed by speed, number of revolutions, rotation axis degree, the seam shape of the ball surface. We carried out the pitching experiment to the clarify the influence of tilt of ball , speed and number of revolutions to the trajectory of the ball. The pitching test was carried out by 12 pitchers of the baseball club in the university. The IoT ball is used to measure speed, number of revolutions and tilt of ball. Pitchi a ball photographed it using a high-speed camera. In addition, we measured the lift coefficient and drag coefficient at the time of pitching by fluid force experiment. In the fluid force experiment, 1-Seam, 2-Seam, and 4-Seam measurements were performed to see the difference in seams. As a result, it was found that the pitching trajectory changed laterally depending on the degree of the rotation axis. Furthermore, the change of lift and drag coefficients with the change of rotation speed for ball of 1-Seam, 2-Seam and 4-Seam was clarified.