Design Study of Magnetically Coupled Piezoelectric Energy Harvester Combined with Mouse Structure

A piezo-magnetic coupled energy harvester based on mouse wheel is proposed in this paper. The entire paper presents theoretical and simulation analysis. The distance between the piezoelectric cantilever beam and the rollers, and the number of magnets on the rollers are used as the study variables in this experiment. When the distance between the magnet attached to the free end of the piezoelectric cantilever beam and the mouse wheel is 17mm and the number of magnets on the wheel is 4, the whole piezoelectric energy harvesting device has the maximum power output. Through the design of the cantilever beam, greater deflection can be produced under the conditions of external force and size determination. At the same time, the introduction of nonlinear force allows the piezoelectric cantilever beam to have a larger bandwidth at low frequencies, which improves the energy harvesting range and capability of the harvester. Combination of piezoelectricity and mouse gives possibility of self-powered mouse, and magnetic coupling deforms piezoelectric elements to make them more durable Besides that, the design of the structure is highly compatible with the actual mouse structure, which provides a great possibility to further combine the piezoelectric element with the mouse structure, and the whole experimental and simulation had verified the possibility of the structure, which provided a great application prospect for the self-powered wireless mouse