Vibration energy collection device, terminal equipment and vibration energy collection method

Abstract

Embodiments of the invention provide a vibration energy collection device, terminal equipment and a vibration energy collection method. The device comprises an acceleration sensor and at least one energy conversion unit. The energy conversion unit comprises a piezoelectric cantilever beam, a stepper motor and a controller. The piezoelectric cantilever beam comprises a substrate. The clamping end of the substrate is engaged with the tail end of a rotating shaft of the stepper motor. The stepper motor is connected with the controller. The controller is used for determining the target engaged position of the tail end of the rotating shaft of the stepper motor with the clamping end and then sending the target engagement position to the stepper motor, according to the preset corresponding relation between the resonant frequency of the piezoelectric cantilever beam and the length of the piezoelectric cantilever beam, and the vibration information reported by the acceleration sensor. The stepper motor is used for adjusting the rotation angle of the rotating shaft of the stepper motor according to the target engagement position. In this way, the resonant vibration of the piezoelectric cantilever beam with the current vibration environment is realized. Therefore, based on the resonant vibration of the piezoelectric cantilever beam with the current vibration environment, the generated electric energy is ensured to be maximum.

Description

Technical field [0001] The embodiments of the present invention relate to piezoelectric power generation technology, and in particular to a vibration energy collection device, terminal equipment, and vibration energy collection method. Background technique [0002] Normally, the terminal equipment is powered by a chemical battery. This method needs to charge the battery from time to time, which not only causes inconvenience to the user, but also shortens the service life of the battery every time the battery is charged; while the piezoelectric power generation device uses The piezoelectric effect can convert the mechanical energy of vibration in the surrounding environment into electrical energy to meet the electrical energy requirements of low-energy-consumption terminal equipment, and its advantages such as simple structure, pollution-free and low cost make it possible to use piezoelectric power generation devices to supply terminal equipment. Energy has become a research hotsp...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the existing piezoelectric power generation device needs to manually adjust the length of the piezoelectric cantilever many times, and the adjustment is often inaccurate, so that the piezoelectric cantilever cannot reach resonance

Images