The invention relates to a ferromagnetic-
coupling vibration energy collection device with double
cantilever beams. The structure of the ferromagnetic-
coupling vibration energy collection device comprises a vibration structure, an external framework, a fastening piece, an upper
cantilever beam, an upper piezoelectric material block, a
mass block, an upper
cantilever beam ferromagnetic block, a lower cantilever beam, a lower piezoelectric material block and a lower cantilever beam ferromagnetic block. The ferromagnetic-
coupling vibration energy collection device has the effect that the double cantilever beams are used as a basic energy collection structure; compared with the other methods, the structure is simple to arrange and design and is easy to fabricate and maintain; the two cantileverbeams are arranged to collect energy, the resonant frequencies of the two cantilever beams can be different by attaching the
mass block onto the upper cantilever beam, so that the beneficial effect of multi-resonant frequency bands is achieved; a non-linear force is introduced by ferromagnetic coupling; and compared with the same-size cantilever beam without ferromagnet, the ferromagnetic-
coupling vibration energy collection device has the advantages that the energy collection efficiency is greatly improved, the bandwidth is greatly expanded, the broadening frequencies of the two cantilever beams can be coincided, so that the output is improved to be applicable to a more complicated working condition.