Although battery powered tennis rackets have been outlawed by the International Tennis Federation, the use of piezoelectrics that themselves generate power have been employed as the most recent development and are deemed legal by the sports’ governing body. For the unitiated, piezoelectric materials produce an electrical current when subject to a deformation or loading such as a bending or compressive force. Under these circumstances they can be used in detectors and strain gauges. Similarly, if an electric current is applied to压电材料，它可以诱导机械变形。以这种方式，可以在执行器中使用。 Incorporating Piezoelectrics Into Tennis Rackets
Piezoelectrics in the form of lead zirconate titanate (PZT) fibres have been embedded into the bodies of composite tennis racket frames, most notably in the head and throat. 他们如何工作？When a player impacts a tennis ball with a piezoelectric equipped racket, it undergoes a slight deformation i.e. bending. The piezoelectric fibres generate an electrical current as a direct response to the deformation. The electric current is fed into a microchip located in the top of the handle. The microchip generates amplifies the piezoelectric effect and produces an electrical response that is fed back into the piezoelectric fibres producing a counterforce which in turn reduces bending. All this happening in the milliseconds while the ball is still on the strings. What Are The Advantages of Using Piezoelectrics in网球拍？The incorporation of piezoelectrics in tennis rackets has two advantages: •The counterforce generated effectively produces a stiffer racket, helping the player to generate more power. •压电还减少了到达玩家的振动，降低了网球弯头的风险，使用铝合金框架球拍的球员遇到的常见问题，在20世纪70年代。这也使球拍更舒服地使用。 谁使配备压电的球拍？At the time of writing, the only manufacturer known to make rackets with piezoelectric electronics was Head. |