| 摘要 |
An energy harvesting apparatus includes a first member 20 comprising a piezoelectric material fixed to a frame 22 at first and second positions, a cantilever beam 26 fixed at one end to the first member between the first and second positions and fixed at the other end to a proof mass 24, and an electrode provided on the first member between the first and second positions. The first member may be a membrane vibrator. The cantilever beam may comprise a piezoelectric material, may be coplanar with the first member and may be fixed to the first member equidistantly between the first and second positions. A plurality of cantilever beams, each comprising a proof mass, may be fixed to the first member. An alternative arrangement (figure 13) is disclosed wherein an electrode is fixed to the first member 130 and a plurality of proof masses 136 are connected to the first member in a spaced relationship between the first and second positions 132. The electrode may be positioned on the first member between the plurality of proof masses, which may be symmetrically spaced. The central area of the first member may not be attached to a proof mass. |
