Article for the play of tennis

摘要

The invention labelled as a whole with (1) in figure 1, concerns the transformation of a normal tennis racket into an opto-electro-acoustic device useful for playing tennis. This article is able to give in real-time, without reducing any of the racket perfomances, exact informations on the right position of the ball impact on the stringing pattern area (4) of the racket (2). The opto-electro-acoustic circuit (3) which essentially is the monitoring system, includes sensor couples (8): the transmitter (13) and the receiver (14) located into the frame head (15). The sensors layout is designed with the purpose of subdividing the stringing pattern area (4) into several regions (s). The circuit (3) emits different acoustic signals depending on which region (or regions) the impact between the ball and the stringing pattern area (4) occurs. $$