Wind energy collector based on flexible polymer piezoelectric material

Abstract

The invention relates to a wind energy collector based on a flexible polymer piezoelectric material. The wind energy collector comprises blades, a rotary shaft, flexible materials, a cylindrical shell, a rotary disc, piezoelectric films and a top cover, wherein the rotary shaft is fixed to the cylindrical shell through bearings and only has one degree of rotation freedom; one end of the rotary shaft is connected with the blades, and the other end of the rotary shaft is connected with the rotary disc; each flexible material and the corresponding piezoelectric film form a flexible piezoelectric polymer cantilever beam, and the multiple flexible piezoelectric polymer cantilever beams are evenly distributed on and fixed to the cylindrical shell; and the top cover is installed at the bottom of the cylindrical shell. The blades are driven to rotate by wind, the rotary shaft transfers the motion to the rotary disc, the rotary disc beats the flexible piezoelectric polymer cantilever beams periodically while rotating, and the piezoelectric films generate electric energy under vibration caused by beating and deformation recovery. The wind energy collector is simple in structure, high in energy collection efficiency, long in service life and suitable for a wide wind speed changing range, the requirements for a manufacturing process are low, and the wind energy collector can provide energy for micro-sensing network nodes.

Description

Technical field [0001] The invention belongs to the field of energy harvesting based on piezoelectric materials, and particularly relates to a wind energy harvester based on flexible polymer piezoelectric materials. Background technique [0002] Due to the rapid development of micromachining, wireless sensing and microelectronics technology, wireless sensors, radio frequency identification systems, embedded systems and the wireless sensor networks formed by them have a wide range of applications in life. The use of traditional battery power supply, due to the large size of the battery, limited capacity, inconvenient replacement and maintenance, etc., make it unable to meet the requirements. This requires seeking new energy supply methods to replace traditional batteries. The piezoelectric energy harvester has the advantages of simple structure, small size, no heating, high output energy density, no electromagnetic interference, and easy integration. Wind energy is widely presen...

AI Technical Summary

Problems solved by technology

However, the current device has complex structure, large size, low power collection efficiency; high manufacturing cost, large resistance force of the stator to the mover, and high starting wind speed required, which is not suitable for use in low wind speed occasions; the blades are located in the cavity internally, which does not facilitate the conversion of wind energy into rotational mechanical energy of the blades

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