| 摘要 |
<p>An object hitting apparatus has an object, such as a ball (7), attachable to a swivel arm (1, 33) which may actuate an impact-measurement device (11, 14) when the object is struck with a bat, a racket, one's foot, hand or other hitting device. On a ball-joint embodiment, the swivel arm (1) is rotated and oriented universally on a ball-joint hub (6) to assimilate flight direction for analyzing trajectory and distance of flight of an unattached baseball, tennis ball, golf ball, puck or other object so hit. On a hinged-arm embodiment, flight angle is indicated by a hinged swivel arm (33). The object can be returned to a position for hitting at an adjustably desired height. Optional electronic means are provided for readout of impact force, flight trajectory and distance of travel of an actual object hit the same as the attached object.</p> |
