Power generation screw based on magnetoelectric-piezoelectric composite structure

Abstract

The invention discloses a power generation screw based on a magnetoelectric-piezoelectric composite structure. The power generation screw comprises a screw rod and a screw head. The top surface of thescrew head is provided with an LED base which is provided with an LED lamp tape. A hollow cavity is formed in the screw rod. A cantilever beam supporting frame is fixed in the hollow cavity of the screw rod. A cantilever beam is installed on the cantilever beam supporting frame. Electromagnetic induction coils are fixed on the two ends of the cantilever beam. The electromagnetic induction coils are led out of leads to be connected with the LED base. A pair of curved magnets of opposite polarity are installed above and below the electromagnetic induction coils in the hollow cavity of the screwrod. A piezoelectric film is respectively fixed on the upper and lower surfaces of the cantilever beam. The back surface of the piezoelectric film is provided with a layer of electrode which is leadout of the lead to be connected with the LED base. The LED light emitting unit, the magnetoelectric unit and the piezoelectric unit are combined in the screw structure so that the acquired vibration energy can be utilized to be converted into electric energy to light up the LED lamp of the external side of the bolt in case of vibration of the screw.

Description

technical field [0001] The invention belongs to the technical field of micro-energy materials and devices, and in particular relates to the design and processing method of a power generation screw of a magnetoelectric-piezoelectric composite micro-energy collector. Background technique [0002] At present, limited by many factors such as space and geological structure, the position and working conditions of the moving parts of coal mining machinery cannot be effectively observed by using the existing lighting system, which is not conducive to ensuring the safety of mine workers. In addition, the coal mining area is a special lighting place, without natural light source for its lighting, the environment is dark and narrow, the surface of the equipment and walls is rough, and the reflection ability of the light source is poor. It poses a great threat to miners' safe operation underground, so it is very necessary to invent a self-powered real-time indicator device for the movin...

AI Technical Summary

Problems solved by technology

[0002] At present, limited by many factors such as space and geological structure, the position and working conditions of the moving parts of coal mining machinery cannot be effectively observed by using the existing lighting system, which is not conducive to ensuring the safety of mine workers

In addition, the coal mining area is a special lighting place, without natural light source for its lighting, the environment is dark and narrow, the surface of the equipment and walls is rough, and the reflection ability of the light source is poor. It poses a great threat to miners' safe operation underground, so it is very necessary to invent a self-powered real-time indicator device for the moving parts of coal mining machinery in the harsh environment of coal mines

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