Frequency-boosting piezoelectric-electromagnetic composite power generation apparatus under vortex street excitation

Abstract

The invention discloses a frequency-boosting piezoelectric-electromagnetic composite power generation apparatus under vortex street excitation, and aims to overcome the limitations of narrow energy harvesting frequency band, only realization of efficient energy harvesting in resonance frequency, and low energy density of the current linear pneumatic piezoelectric power generator. The frequency-boosting piezoelectric-electromagnetic composite power generation apparatus comprises a rectangular container cavity, a vortex street excitation apparatus, a limiting shaft and a rectangular coil; the vortex street excitation apparatus and the limiting shaft are mounted in the rectangular container cavity; and the rectangular coil is glued at the back end of the interior of the rectangular containercavity. The vortex street excitation apparatus performs high-frequency vibration under excitation of a low-frequency high-pressure gas, and a magnet at the tail end cuts the rectangular coil to realize electromagnetic power generation; and meanwhile, the vortex street excitation apparatus is in collision with the limiting shaft in the movement process, so that cantilever beam deformation is causedto realize piezoelectric power generation. By virtue of a cylindrical turbulent flow effect, the vibration frequency of the piezoelectric element and the magnet can be improved, and by combination ofpiezoelectric power generation and electromagnetic power generation, the energy harvesting bandwidth of the power generation apparatus is expanded, and energy density is improved, so that the frequency-boosting piezoelectric-electromagnetic composite power generation apparatus has wide application prospect in the field of the pneumatic technology.

Description

technical field [0001] The invention relates to a frequency-up piezoelectric-electromagnetic composite power generation device under vortex street excitation, which belongs to the field of pneumatic technology. Background technique [0002] With the continuous improvement of the intelligent level requirements of intelligent manufacturing equipment, wireless sensing technology and pneumatic technology have been deeply integrated, and a large number of wireless sensors are applied to pneumatic systems to complete the self-detection and self-perception of pneumatic systems, which is to realize the intelligentization of pneumatic systems. important means. The continuous and reliable energy supply for a large number of wireless sensors in the pneumatic system is the premise to ensure their normal operation. The energy supply method of the wireless sensors in the pneumatic system is mainly based on the direct power supply of the battery. The battery has problems such as limited se...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the current linear pneumatic piezoelectric generator has a narrow energy capture frequency band, can only efficiently capture energy at the resonance frequency and has low energy density, the present invention discloses a frequency-up piezoelectric-electromagnetic composite generator under vortex street excitation. power generation device

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