Friction - Piezoelectric - magnetic composite micro vibration energy harvester

The present invention discloses a friction - Piezoelectric - magnetic composite micro vibration energy harvester, the magnet is suspended by a means sensitive to a micro-energy collector, improves the sensitivity of the sensitive member, in order to achieve collection of mechanical energy; simultaneously, a piezoelectric having complementary operating mode, magnetic, friction three kinds of power generation units are integrated, in order to achieve efficient collection of mechanical energy. From the middle to both sides, in turn comprising an electromagnet collector, friction film, an electromagnetic induction coil, the piezoelectric layer and the base structure, using an electromagnetic levitation layer design, to avoid the conventional structure of the above sensing element is mechanically connected, may be induced finer mechanical vibration; using a piezoelectric layer and connected to one end of the fixed electrode, the other end of the displacement of the support structure design, and the use of the same magnetic poles repel principle, sensitive displacement sensing element (magnet suspension) of the piezoelectric film deforms . Using friction layer superposed manner bilayer membrane, by a suspension magnet vibration contact friction layer between two friction induced charge film.