A Wind-Induced Vibration Piezoelectric Energy Harvester

Abstract

The invention relates to a wind-induced vibration piezoelectric energy harvester, which belongs to the technical field of new energy sources. The upper and lower ends of the beam of the bracket are respectively provided with upper and lower beams with slideways; the upper and lower ends of the blunt body of the coupler are provided with ear plates, the inner sides of the two ear plates are connected by cylinders, and the outer sides are equipped with half shafts. There are two parallel column planes, and the cylinder and the two ear plates are provided with interconnected through grooves; the two ends of the cylindrical pin and the two semi-axes are sleeved in the slideways of the upper and lower beams; one end of the reed It is placed in the through groove and fixed on the ear plate by screws, and the other end passes through the narrow slit of the cylindrical pin; the connecting ears of the two baffles are respectively installed on the upper and lower beams through screws, and the arc plates pass through the blunt body and the cylinder. The gap between the bodies passes through and contacts each other; one end of the piezoelectric vibrator composed of the substrate and the piezoelectric sheet is installed on the beam through the screw and the pressure plate of the shape-limiting frame, and the free end leans against the column plane; the two ends of the pressure plate of the shape-limiting frame Both are provided with a shape-limiting block with a shape-limiting surface, and the substrate at the fixed end of the piezoelectric vibrator is in contact with the shape-limiting surface.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a wind-induced vibration piezoelectric energy harvester. Background technique [0002] In recent years, with the maturity of wireless sensor network technology and its popularization in the fields of environmental monitoring, health monitoring of large buildings and bridges, industry, military and public safety, micro-wind power that provides continuous energy supply The research on energy harvesters has attracted extensive attention from scholars at home and abroad. The miniature wind energy harvesters that have been proposed so far are basically based on electromagnetic principles and piezoelectric principles. Because piezoelectric energy harvesters do not generate electromagnetic interference during the power generation process, they are more suitable for wireless systems such as wireless network nodes. There are two main types of wind energy harvesters constru...

AI Technical Summary

Problems solved by technology

The common feature of the above-mentioned piezoelectric energy harvesters is to directly use the inertial force of the end mass of the piezoelectric vibrator to make it bend and deform and generate electricity. The main disadvantages are: poor wind speed adaptability, small effective wind speed range, bidirectional deformation of the piezoelectric vibrator, The sheet is subjected to alternating tensile and compressive stresses and lacks necessary shape-constraining measures, and the adjustable range of the piezoelectric vibrator scale and the natural frequency of the system is small

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