Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 12, 2021 - November 14, 2021
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.
The Proceedings of Joint Symposium: Symposium on Sports Engineering, Symposium on Human Dynamics
