Abstract: The present invention provides an intelligent bicycle and the front fork thereof, in which piezoelectric elements are provided on a position of a bicycle front fork or frame having vibration amplitude greater than a set value under a vibration frequency. By converting of direct and converse piezoelectric effect by the designed circuit modules integrated on the front fork or frame, the intelligent bicycle according to the present invention is provided with functions of energy storage and vibration suppression.

Abstract: A vibration reducing golf club includes a club main structure and a plurality of piezoelectric materials. The club main structure includes a club shaft and a ball head and can sustain the mechanical energy resulting from the swing of the club shaft and the collision between the ball head and a golf ball and consequently produces vibration and bending deformation. The piezoelectric materials are connected with conductive wires and adhered to the club shaft. When the club shaft undergoes mechanical deformation, the piezoelectric materials can transform the energy of mechanical deformation into electrical energy, thereby producing a voltage output and then feeding the voltage back to another piezoelectric material, so as to produce a deformation against the vibration direction of the club shaft. Thus, the vibration energy of the club shaft can be consumed. Therefore, the vibration reducing performance can be obtained by reducing the vibration of the club shaft.