Friction-piezoelectricity-magnetoelectricity composite vibration miniature energy collector

Abstract

The invention discloses a friction-piezoelectricity-magnetoelectricity composite vibration micro-energy collector. A magnet is suspended to serve as a sensitive unit of the miniature energy collector, thereby improving the sensitivity of a sensitive part, and achieving the collection of mechanical energy. Meanwhile, three power generation units (piezoelectricity, magnetoelectricity and friction) with a complementary working mode are integrated, thereby achieving the high-efficiency collection of the mechanical energy. The collector sequentially comprises an electromagnet, frictional films, an electromagnetic induction coil, a piezoelectric layer and a structural substrate from the center to two sides. An electromagnetic layer employs the magnetic suspension design, thereby avoiding the mechanical connection on a sensitive element in a conventional structure. The controller can sense smaller mechanical vibration. One end of the piezoelectric layer is fixed and connected with an electrode, and the other end of the piezoelectric layer employs a staggered support structural design. Moreover, the controller employs the principle of homopolar repulsion of a magnetic field, senses the displacement change of a sensitive induction element, and enables a piezoelectric film to deform. A frictional layer employs a mode that two films are overlapped, and is contacted through the vibration of a suspended magnet. Charges are induced between two frictional films.

Description

technical field [0001] The invention belongs to the field of device technology energy materials and device technology, and specifically relates to a device structure design of a friction-piezoelectric-magnetoelectric composite single-degree-of-freedom micro-energy collector. Background technique [0002] Energy is the material basis of human activities. The rapid development of the current world economy and the continuous progress of human civilization are inseparable from the wide application of fossil energy, including coal, oil, and natural gas. Therefore, it is no exaggeration to say that the current world economy is based on fossil energy. Up. However, the global greenhouse effect and energy shortages caused by economic development have begun to fully affect the survival and development of human society, which forces people to constantly look for new energy sources and change the current energy use methods and structures. Electric energy is the most effective and dire...

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Problems solved by technology

However, no matter which form of power generation method has certain limitations, it cannot achieve efficient collection of mechanical energy, and most of the input energy is dissipated in the form of heat energy, material deformation, and object kinetic energy.

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