Multi-magnet structure for energy harvesting and sensing

Abstract

The invention relates to a multi-magnet structure for energy harvesting and sensing, comprising a rotor, a stator and an optional fixing mechanism and isolating mechanism, wherein the rotor and the stator can be separately processed into axially magnetized cylinders and circular rings or radially magnetized magnetic balls according to different application occasions to form a magnetic column typeand a magnetic ball type; in the magnetic column type, the rotor magnetic column is adsorbed beside the stator magnetic ring along the circumferential direction under the action of magnetic force; inthe magnetic ball type, the rotor magnetic ball is adsorbed on the surface of the stator magnetic ball along the radial direction under the action of the magnetic force and gravity; and under the action of external excitation, the rotor magnetic column in the magnetic column type rotates along the circumferential direction of the stator magnetic ring, and the rotor magnetic ball in the magnetic ball type swings and even rotates around the equilibrium position. With the movement of the rotor, the transformation from the external excitation to a variation magnetic field can be realized, and thusthe energy harvesting of the external excitation in any direction can be realized by using coils based on the principle of electromagnetic induction, and the sensing of external excitation conditionscan be realized by sensing the variation of magnetic fields through a magnetic sensor.

Description

technical field [0001] The invention relates to energy collection and sensing technology, in particular to a multi-magnet structure applied to energy collection and sensing. Background technique [0002] At present, the structures widely used in energy harvesting and sensing mainly include cantilever beam structures based on permanent magnets as mass blocks or pasted piezoelectric sheets, magnetic levitation structures based on electromagnetic induction principles, and rotating structures based on bearings. Although the cantilever beam structure has a wide range of applications and types, the inevitable mechanical fatigue with the vibration of the beam has always restricted its performance and service life. In addition, the degree of freedom of the cantilever beam structure is limited. The magnetic levitation structure usually consists of two fixed permanent magnets to suspend a permanent magnet in a tubular mechanism, and there is a certain working angle, which limits its d...

AI Technical Summary

Problems solved by technology

The magnetic levitation structure usually consists of two fixed permanent magnets to suspend a permanent magnet in a tubular mechanism, and there is a certain working angle, which limits its degree of freedom

Due to the use of bearings in the rotating structure, the structure is usually complex and the installation is troublesome, and with the increase of demand, higher requirements are put forward for the performance of the bearing and the accuracy of installation

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