PIEZOELECTRIC ENERGY HARVESTING DEVICE

摘要

PURPOSE: A piezoelectric energy harvesting device is provided to obtain energy in broadband by resonance from excited vibration frequency, thereby increasing electricity harvest efficiency. CONSTITUTION: Multiple piezoelectric plates (120) are installed on the exterior of a main body (110) at regular intervals. The piezoelectric plate comprises piezoelectric material and a pair of electrodes which are adhered to the piezoelectric material. A mass (130) is installed at the end of the longitudinal direction of the piezoelectric plate. Magnetic material (140) is separately located in fixed distance away from the mass. The magnetic material is formed into ring-shaped multi layers which have identical floor number of the piezoelectric plates.