THE PIEZOELECTRIC ENERGY HARVESTER AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A piezoelectric energy harvester and a manufacturing method thereof are provided to obtain a sufficient voltage for a switch drive of a power control circuit according to the displacement speed of a cantilever tip. CONSTITUTION: A piezoelectric layer(330a,330b) is respectively formed on the upper and lower sides of a metal core(310). A first voltage is generated by the vibration of the piezoelectric layer. A magnetostrictive layer(350a,350b) is formed on the upper side of the piezoelectric layer. The magnetostrictive layer induces the change of a magnetic field by the vibration. A coil(370) surrounds the piezoelectric layer and the magnetostrictive layer.