Bistable and double cantilever beam piezoelectric power generating device

Abstract

The invention discloses a bistable and double cantilever beam piezoelectric power generating device. A clamp is fixed in a casing; two bistable piezoelectric cantilever oscillator structures are respectively arranged at two ends of the clamp and the inner wall of the casing at the same side of the clamp; each bistable piezoelectric cantilever oscillator structure comprises a twin crystal bistable piezoelectric cantilever beam fixed with the clamp; a first permanent magnet is arranged at the free end of the twin crystal bistable piezoelectric cantilever beam; a second permanent magnet is fixed on the inner wall of the casing of the same side of the clamp and positioned at the same horizontal position of the first permanent magnet; two permanent magnets are oppositely arranged according to magnetic poles; the twin crystal bistable piezoelectric cantilever beam comprises an elastic beam and piezoelectric layers which are attached to an upper surface and a lower surface of the elastic beam; the elastic beam is respectively equal to the piezoelectric layers in width and length; and electrodes are respectively arranged on the upper surface and the lower surface of each piezoelectric layer. According to the coherent nonlinear characteristic of the bistable and double cantilever beam piezoelectric power generating device disclosed by the invention, the great motion under wide-narrow frequency excitation can be realized, environment vibration can be effectively utilized for generating power and the power generating efficiency is increased. Two groups of piezoelectric cantilever beams are combined so as to effectively increase the power generation amount of the device in unit time.

Description

technical field [0001] The invention relates to a bistable double cantilever beam piezoelectric power generation device, which can effectively utilize the vibration energy of the surrounding environment to generate power, and belongs to the field of energy-saving technology and renewable environmental protection new energy. Background technique [0002] The positive piezoelectric effect of piezoelectric materials can convert the vibration kinetic energy in the surrounding environment into usable electrical energy. Piezoelectric materials have a simple structure, green environmental protection, high energy density, no electromagnetic interference, and are easy to process and realize miniaturization and integration. , has obvious advantages. Piezoelectric power generation devices can be used for power supply of microelectronic equipment and mobile electronic equipment, etc., realize self-supply of electronic equipment, avoid the inconvenience caused by battery replacement or f...

AI Technical Summary

Problems solved by technology

However, the above-mentioned technical solutions all use a single piezoelectric cantilever beam to generate electricity. The limitation of the structure itself makes the utilization rate of environmental vibration energy low, and the power generation per unit time is small.

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