画像解析による卓球の球の軌跡と回転の計測

抄録

Drive is the most common ball type of table tennis, but there are a high-bouncing general drive and a low-bouncing drive. In order to clarify the mechanism of the latter drive, we used a table tennis machine and a digital camera (960 frames per second), and examined changes in the angle, rotation number, and velocity speed of the ball before and after the ground contact. As a result, it was found that the ratio of peripheral speed to speed immediately before landing was an important parameter. When its value was smaller than 1, the ball type became a high-bouncing general drive. When its value was larger than 1, the ball type became a low-bouncing and fast drive.