Energy collection device, method and system

The invention discloses an energy collection device, method and system, and mainly relates to the technical field of vibration energy collection. Comprising a base and an energy collection circuit board, the base is of a rectangular frame structure and is provided with a supporting structure, a bearing structure is rotatably arranged on the supporting structure, a cantilever arm device is welded to the bearing structure, and a magnetic liquid container is arranged at one end of the cantilever arm device; the other end of the cantilever arm device is provided with a friction nanometer generator, the side, close to the magnetic liquid container, of the cantilever arm device is provided with a piezoelectric device, and the magnetic liquid container, the friction nanometer generator and the piezoelectric device are electrically connected with an energy collection circuit board; the output end of the energy collection circuit board is connected with an energy storage device. The device has the beneficial effects t