Near the zero-displacement or rest point, the gap would be large and for higher displacements the gap could be smaller. In other words, the rack 36 engages the larger diameter pinion 32 to drive the generator near the zero-displacement position and at larger displacements, rack(s) 38 could engage smaller diameter pinion 34, achieving a higher generator rotation per length of oscillator movement. No magnets 28 are placed near the zero displacement or rest point and the magnet density increases at higher amplitudes, as shown thereby increasing the harvesting rate at higher amplitudes. In other words the gap between the magnet 28 and an immediately adjacent coil 26 will vary with the amplitude of the oscillation of the at least one bluff body 14. The phrase “immediately adjacent coil 26” in this context will be the coils 26 that are the same vertical height/horizontal level of the magnet 28 (assuming the stand 12 is positioned vertically).
- Dificultades para conciliar el sueño
- Evite actividades que lo obliguen a permanecer de pie por largos períodos de tiempo
- Vigila tus niveles de presión arterial y glucosa
- Grupo de Estudio de Trastornos de la Vigilia y el Sueño
2A and 2B the gap between coils 26 and magnet 28 varies with the amplitude of the oscillation of the body 14 in this linear generator. With this configuration the gap between the magnet 28 and an immediately adjacent coil 26 is lower at a higher amplitude of the oscillation of the bluff body 14 than at a lower amplitudes of the oscillation of the at least one bluff body 14 as generally shown.
FIGS. 6A and B are schematic views of a fluid flow induced oscillating energy harvester 10 with variable damping based upon oscillation amplitude according to further embodiments of the present invention. 5 the compound motion of the four bar linkage 46 and the linkages 42 and 44 provides for the variable harvesting rate. In FIG. 6A the support 18 is replaced with a four bar linkage 46 and the rotary generator 20 is moved outside of the stand 12 to a position between the four bar linkage 46 as shown using the linkages 42 and 44 similar to FIG. Since the oscillation amplitude of the bluff body 14 varies with the flow rate 16, harvesting rates that varies with the flow rate 16 can be achieved in a simple, cost effective, passive design in the energy harvester 10 by varying the rate of harvesting with the position of the oscillating structure.
In this embodiment the distribution of the magnets 28, also called herein the density of the magnets 28, varies with height as shown here. RELATED APPLICATIONS This application is a continuation of International Patent Application serial number PCT/US2015/031331 entitled “Fluid Flow Induced Oscillating Energy Harvester with Variable Damping Based upon Oscillation Amplitude” and which published Nov. It is an object of the present invention to address this deficiency in the prior art fluid flow induces oscillating energy harvesters. FIG. 7 is a perspective view of a fluid flow induced oscillating energy harvester formed according to the present invention. For example, FIG. 5 is a schematic view of a fluid flow induced oscillating energy harvester 10 with variable damping based upon oscillation amplitude according to another embodiment of the present invention in which a rack 36 is mounted to a linkage 42 coupled to the support 18 and meshes with a pinion 32 driving a rotary generator with the pinion 32 mounted on a separate linkage 44 coupled to the stand 12. Dolor muscular en las costillas derechas . The compound motion of the support 18 and the linkages 42 and 44 provides for the variable harvesting rate.