A two-dimensional electromagnetic kinetic energy harvester

Abstract

The invention discloses a two-dimensional electromagnetic kinetic energy acquisition device. The acquisition device mainly comprises an outer frame, an inner frame and balls, wherein the outer frame is composed of a casing, a coil fixing plate and a coil array, the inner frame is composed of a bracket, a magnet fixing plate, magnet arrays and springs, the inner frame is separated from the outer frame by the balls, the springs are arranged around the inner frame, an initial interval is arranged between the springs and the outer frame, a lattice coil array is formed by multiple metal coils, theadjacent coils are connected in series reversely, multiple magnets form the lattice magnet arrays, magnetic poles of the adjacent magnets are opposite in direction, planar dimensions of each coil arethe same as the corresponding magnets, the multilayer magnet arrays are horizontally fixed on the inner frame, one of every two layers of magnet arrays is fixed on the coil array on the outer frame, south and north poles of the magnets at the same position on the adjacent two layers of the magnet arrays are opposite, and adjacent two layers of coils are connected in series reversely. The two-dimensional electromagnetic kinetic energy acquisition device is advantaged in that vibration energy in any direction in the horizontal plane can be acquired, and the acquisition device can be applied to the Internet of things field.

Description

【Technical field】 [0001] The invention belongs to the fields of renewable energy and the Internet of Things, and in particular relates to a novel power supply capable of supplying power to wireless sensor nodes. 【Background technique】 [0002] In recent years, important progress has been made in microelectronics technology, sensor technology and wireless communication technology, which has promoted the development of Internet of Things technology. The Internet of Things technology needs to form a network of thousands of wireless sensor nodes. Most of these wireless sensor nodes are currently powered by traditional chemical batteries. Due to the short life and large size of these chemical batteries, they have high requirements on the temperature and humidity of the operating environment. Moreover, it will pollute the environment, and its application is greatly restricted. Therefore, the power supply technology based on chemical batteries has seriously restricted the rapid dev...

AI Technical Summary

Problems solved by technology

Most of the micro-vibration energy harvesters reported so far can only efficiently collect vibration energy in a specific direction, and the efficiency of collecting vibration energy in other directions is very low

However, vibrations in natural environments (such as human body, trees, high-rise buildings, long-span bridges, ships, etc.) generally have low frequencies, mostly below 30Hz, and these vibrations also have multi-directional, broadband (wide frequency bandwidth), weak Therefore, the conventional resonant micro-vibration energy harvester has low efficiency in collecting multi-directional, low-frequency, broadband and weak vibration energy in these natural environments, and its output cannot meet the power demand of wireless sensor nodes.

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