A crank-connecting rod type electromagnetic piezoelectric composite energy harvesting device

Abstract

The invention relates to a crank and connecting rod type electromagnetic piezoelectric composite energy collecting device. The crank and connecting rod type electromagnetic piezoelectric composite energy collecting device comprises a bottom disc, a crank, connecting rod and slide block mechanism, a rotary input mechanism and an electromagnetic piezoelectric mechanism, wherein four slide grooves or more are arranged at one side surface of the bottom disc in a radial way, and one end of the four slide grooves or more is gathered at the center of the bottom disc; the crank, connecting rod and slide block mechanism comprises a crank, four connecting rods or more and slide blocks, and the slide blocks are respectively and correspondingly positioned in four slide grooves or more; the rotary input mechanism is positioned at the other side surface of the bottom disc, and is a mass swing rod mechanism or a rotary wheel mechanism; the electromagnetic piezoelectric mechanism comprises four piezoelectric bimorph beam mechanisms or more, four magnets or more and coils, and the coils are uniformly arranged at both sides of each slide groove. The crank and connecting rod type electromagnetic piezoelectric composite energy collecting device has the advantages that under the action of outside excitation, the rotary input mechanism is used for driving the magnets to do reciprocating movement in the slide grooves, and the multiple coils can produce and output sensing current; the piezoelectric bimorph beam mechanisms can generate larger vibration and bending deformation, and produce and output charges.

Description

technical field [0001] The invention belongs to the technical field of energy recovery, and relates to an electromagnetic piezoelectric composite energy conversion technology, in particular to a crank connecting rod type electromagnetic piezoelectric composite energy collection device. Background technique [0002] The modernization of the world economy has benefited from the wide application of fossil energy, such as oil, natural gas, coal, etc., so it is an economy based on fossil energy. Extensive use of fossil energy will increase carbon emissions and intensify the greenhouse effect. At the same time, once the chain of fossil energy and raw materials is interrupted, it will inevitably lead to the intensification of the world economic crisis and conflicts, and lead to the outbreak of the energy crisis. In today's increasingly serious energy shortage, it is of great significance to replace traditional fossil energy with clean and renewable energy. [0003] Energy harvest...

AI Technical Summary

Problems solved by technology

Although the structure uses both electromagnetic and piezoelectric effects to generate electricity; however, the piezoelectric bicrystal beam mainly relies on the vibration excitation in the external environment to generate vibration. Large vibrations can only be generated when the frequency is close, and the vibration in the natural environment is often low-frequency random vibration, so the vibration amplitude of the piezoelectric bicrystalline beam in this device is very limited, and the deformation of the piezoelectric element is not large. weak effect

At the same time, the relative displacement between the magnet block at the end of the piezoelectric bicrystalline beam and the multi-turn coils on both sides is also small, the change of magnetic flux is not obvious, and the efficiency of electromagnetic power generation is also low.

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