| 摘要 |
The invention relates to the field of functionalisation of deformable balls, such as, for example, tennis balls. The device (10) comprises a deformable shell (12) defining an inner space (14); a resilient band (18, 30, 32) suspended in the inner space (14) and including two ends secured to the deformable shell (12), said band (18, 30, 32) including a piezoelectric material (30, 32), such as to produce an electric voltage when the shell (12) is deformed, and two electrodes for collecting the voltage; and an electronic circuit (34) for treating the voltage, arranged on the resilient band (18, 30, 32) and connected to the electrodes of the resilient band (18, 30, 32). |
