| 摘要 |
The device for ball games and the like, in particular for tennis, comprises several signal transmitters (I to VII), each of which responds to a component of force, which is characteristic of the racket grip or of the sequence of movement of the racket during a stroke, by emitting a signal. The signals emitted by the signal transmitters (I to VII) are analysed in a processing circuit and processed to form an overall indication which informs the player either acoustically or visually whether the handling of the racket was correct or incorrect during the execution of a stroke cycle. <IMAGE> |
