A wide-band low-frequency vibration energy harvesting device

Abstract

The invention discloses a broadband low-frequency vibration energy collection device. The device comprises a bottom plate, a working point adjusting device, a spring, an elastic leaf spring, a lower clamping groove, an upper clamping groove, an inner permanent magnet ring, an outer permanent magnet ring, a power generation permanent magnet, a coil, a first bracket and a second bracket, the workingpoint adjusting device and the first bracket are connected with the bottom plate. One end of the spring is connected with the top of the working point adjusting device; the other end of the spring isconnected with the bottom of the lower clamping groove; the lower clamping groove is fixedly connected with the inner permanent magnet ring through a lower pressing ring; the upper clamping groove isfixedly connected with the inner permanent magnet ring through an upper pressing ring; the power generation permanent magnet is located in the coil and fixedly connected with the upper clamping groove through a connecting rod, the coil is fixedly connected with the first bracket through a first fixing frame, the outer permanent magnet ring is fixedly connected with the first bracket through a second fixing frame, and the outer permanent magnet ring is arranged in the outer side of the inner permanent magnet ring in a sleeving mode. The broadband low-frequency energy collection device is compact in structure, and broadband low-frequency energy collection is achieved.

Description

technical field [0001] The invention relates to the field of energy recovery, in particular to a broadband low-frequency vibration energy collection device. [0002] technical background [0003] With the development of micro-electromechanical systems (MEMS) and new sensing technologies, sensors are becoming increasingly intelligent, miniaturized, and wirelessly networked, and wireless sensor networks (WSN) have also emerged accordingly. Wireless sensor nodes are the core hardware foundation of wireless sensor networks, so keeping wireless sensor nodes working for a long time is a condition that must be met in wireless sensor network applications. With the rapid development of low-power circuit design technology, the volume of wireless sensors is continuously reduced, and the power consumption is also continuously reduced. At present, milliwatt-level or even microwatt-level power can ensure the normal operation of a low-power wireless sensor node, which makes it possible to ...

AI Technical Summary

Problems solved by technology

At present, the common bistable energy harvesters are mostly cantilever beam structures, and their disadvantages are that the structure is not compact enough, and the stress concentration is easy to damage

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