Blade-type composite pneumatic energy collector

Abstract

A blade-type composite pneumatic energy collector comprises a piezoelectric type energy collecting module and a friction type energy collecting module. The piezoelectric type energy collecting module comprises blades and a flexible piezoelectric cantilever. The blades are in parallel connection with the free end of the flexible piezoelectric cantilever. The blades can drive the flexible piezoelectric cantilever to vibrate periodically in a frame. The friction type energy collecting module comprises a moving friction layer pasted on the surface of the flexible piezoelectric cantilever and a fixed friction layer pasted on the surface of the frame. The moving friction layer and the fixed friction layer can relatively contact and separate periodically in the frame. The collector adopts two energy collecting modes: the friction type and the piezoelectric type, and the energy output density is increased. The blades at the tail end of the cantilever can response better to the disturbance of the wind flow, and the amplitude of the piezoelectric cantilever and the piezoelectric voltage output are increased. In addition, the double-arc-shaped flow choking structure of the frame can enlarge the contact area between the friction layers, and the friction voltage output is increased.

Description

technical field [0001] The invention relates to the field of energy collection and conversion equipment, in particular to a blade-type composite wind energy collector. Background technique [0002] At present, wireless sensor networks are widely used in environmental monitoring, smart home, transportation, medical health and other fields, but the power supply problem of wireless sensor nodes has become a key factor restricting its development. The traditional battery power supply method has problems such as large volume, short life, and difficult replacement, especially in remote uninhabited areas. Harvesting energy from the environment to power wireless sensor nodes is an effective way to replace batteries. [0003] As a non-polluting and renewable clean energy, wind energy has great potential for development, especially for coastal islands, remote mountainous areas with inconvenient transportation, sparsely populated grasslands and pastures, and rural areas that are far a...

AI Technical Summary

Problems solved by technology

At present, wind energy harvesters capable of achieving high output are often bulky and complex in structure

Although the existing wind energy harvester with cantilever beam structure is simple in structure and small in size, its high operating frequency and small amplitude lead to low voltage output and it is difficult to obtain ideal power output

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