A cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams

Abstract

A cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams, relates to a power generation device, which is used to convert the flow-induced vibration generated by fluid flowing around a blunt body into an electromechanical conversion device for electric energy. The power generation device includes a cylinder, a piezoelectric Electric chip, metal sheet, support structure, piezoelectric chip is bonded on both sides of the metal sheet to form a bimorph piezoelectric beam and placed inside the cylinder. The plane of the piezoelectric beam is parallel to the axial direction of the cylinder and the direction of incoming flow. The periodic vibration of the cylinder caused by vortex shedding when flowing around the cylinder drives the piezoelectric cantilever beam to vibrate. The base can be fixed on the bottom of the ocean, river or on the wall of the water flow or airflow pipeline, thereby converting the kinetic energy of the fluid into electrical energy. The device has a simple structure and can be started under low flow conditions.

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 for...

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.

Images