Static coil type micromechanical electromagnetic vibration energy collector based on frequency boost conversion

Abstract

The invention discloses a fixed-coil micro mechanical magnetic vibration energy collector basing on upconversion in the field of new energy technology. The collector comprises a vibration pickup station with low frequency, a resonance station with high frequency, a spacer and an induction coil; the vibration pickup station with low frequency comprises a coping, an upper-layer flat spring and a start-oscillation permanent magnet and / or a soft magnet. The upper-layer flat spring is fixed at the edge of the groove at the coping, the upper-layer flat spring comprises an upper-layer central platform and the surrounded upper-layer cantilever beam, the start-oscillation permanent magnet and / or the soft magnet are fixed on the upper-layer central platform; the resonance station with high frequency comprises frames, a lower-layer flat spring and a resonance permanent magnet, the lower-layer flat spring is fixed on the frames, the lower-layer flat spring comprises a lower-layer central platformand the surrounded lower-layer cantilever beam, and the resonance permanent magnet is fixed at the lower-layer central platform; the spacer is located between the resonance station with high frequency and the induction coil; the winding of the induction coil is fixed at the insulated underlay which is fixed under the spacer without movement. The conversion rate of the invention is high, and manufacture of batches and integration can be realized.

Description

technical field [0001] The invention relates to a collector in the field of micro-electromechanical technology, in particular to a fixed-coil micro-mechanical electromagnetic vibration energy collector based on up-frequency conversion. Background technique [0002] With the maturity of microelectronics technology, high technologies such as automotive sensing, embedded systems, RFID (radio frequency identification) and wireless sensor networks are developing rapidly. These technologies require power supply components to have the characteristics of small size, light weight, and long life. The main power supply methods at present are batteries and wired power supply. The battery life is short, the storage energy is limited, and compared with the above devices, the volume and mass are large. When the working life is more than a few years, the battery-based power supply method is difficult to meet the power supply requirements of sensor nodes. Wireless communication and various...

AI Technical Summary

Problems solved by technology

Although this design can achieve up-conversion, but because the coil is made on a movable platform, the device manufacturing process is too complicated and it is difficult to make a multi-layer coil

Since the permanent magnet passes through the plane where the coil is located, the permanent magnet occupies most of the area. When the device area is constant, the size of the coil winding is limited, including the number of turns and the length of the winding. Therefore, the induced electromotive force that the coil can generate is also limited. limit

At the same time, since the permanent magnet occupies most of the area, the size and shape of the cantilever are strictly limited. When designing the device structure, it is difficult to change the stiffness of the cantilever by adjusting the shape and size of the cantilever, and it is difficult to change the thickness of the damping hole. Adjusting the damping force inside the structure, and then changing the amplitude and natural frequency, can only achieve up-conversion at a limited number of frequency points, and it is difficult to meet the requirements of using up-conversion in any frequency band within a wide frequency range from a few Hz to hundreds of Hz. Requirements for efficient energy harvesting through frequency conversion

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