Cylindrical vortex-induced vibration generation device with built-in piezoelectric beam

Abstract

The invention discloses a cylindrical vortex-induced vibration generation device with a built-in piezoelectric beam, and relates to a generation device which is an electromechanical conversion device used for converting flow-induced vibration generated by fluid flowing around a bluff body into electric energy. The generation device comprises a cylinder, piezoelectric wafers, a metal sheet and a support structure, wherein the piezoelectric wafers are pasted on the two surfaces of the metal sheet to form a double-wafer piezoelectric beam arranged inside the cylinder, the plane piezoelectric beam is parallel to the axial direction of the cylinder and the direction of incoming flow, the piezoelectric cantilever beam is driven to vibrate by the periodic vibration of the cylinder due to vortex shedding formed by the fluid flowing around the cylinder, the base can be fixed at the bottom of sea and river or on the pipe wall of water flow pipeline and air flow pipeline, so that the kinetic energy of the fluid can be converted into the electric energy. The device is simple in structure and can start at a low flow rate.

Description

technical field [0001] The invention relates to a power generating device, in particular to a cylindrical vortex-induced vibration power generating device with a built-in piezoelectric beam. Background technique [0002] As an underwater extension of land-based wireless sensor networks, underwater wireless sensor networks can be used in data collection, pollution monitoring, disaster prevention, marine resource survey, underwater auxiliary navigation and positioning, remote underwater control, anti-submarine central warfare, etc. The economy and national defense play an important role. Since underwater sensor networks are mostly deployed on the seabed, their maintenance and replacement costs are high, so underwater wireless sensor networks need a stable, reliable, portable and long-term energy supply. However, the current marine power generation technology using wave and tidal power generation cannot be realized on the seabed or the equipment is too large to be suitable...

AI Technical Summary

Problems solved by technology

Since underwater sensor networks are mostly deployed on the seabed, their maintenance and replacement costs are high, so underwater wireless sensor networks need a stable, reliable, portable and long-term energy supply

However, the current marine power generation technology using wave and tidal power generation cannot be realized on the seabed or the equipment is too large to be suitable for underwater wireless sensor networks. Therefore, the power supply problem has become one of the technical bottlenecks of underwater wireless sensor networks.

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