Spatial electromagnetic energy-based wireless sensor self-power supply system and spatial electromagnetic energy-based wireless sensor self-power supply method

Abstract

The invention relates to a spatial electromagnetic energy-based wireless sensor self-power supply system, which comprises an electric field energy collecting device, a magnetic field energy collecting device and an electric energy adjusting unit, wherein the electric field energy collecting device and the magnetic field energy collecting device are connected with the electric energy adjusting unit through wires respectively. Meanwhile, the invention also discloses a spatial electromagnetic energy-based wireless sensor self-power supply method, which comprises the following steps: A, electric field energy collection; B, rectification; C, storage; D, output; and E, magnetic energy collection. The system and the method have the advantages of fully utilizing the inherent advantage of rich electromagnetic energy in a high voltage substation, effectively solving the problem of an energy supply bottleneck of a wireless sensor node, along with simple theory and convenient implementation. A self-power supply device designed according to the method is simple in structure, proper in volume, convenient in installation, stable, high-efficiency, economic and practical and has great significance for the promotion of wireless sensor network technology and the realization of comprehensive automation of the substation.

Description

technical field [0001] The invention relates to a self-energy supply system and method applied to wireless sensors, in particular to a wireless sensor self-energy supply system and a self-energy supply method based on space electromagnetic energy. Background technique [0002] At present, the wireless sensor network is a target information-oriented real-time monitoring network composed of a large number of distributed sensor nodes. Its most prominent advantages are the small footprint of the sensor nodes and the wireless data transmission mode, which is especially suitable for industries with complex and harsh environmental conditions and difficult wiring. The environment is considered to be the development direction of future sensor technology. However, wireless sensor technology has not been marketed as quickly as people originally expected, and one of the most critical bottlenecks is the energy supply problem. [0003] In order to solve the energy supply problem of wirel...

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Problems solved by technology

The development of solar cells based on the photovoltaic effect is relatively mature, and has the advantages of being clean, environmentally friendly, cheap, and renewable, but its output power is too unstable due to factors such as time and weather; Large panel area, which contradicts the requirement of miniaturization of sensor nodes

The principle of vibration-based electric energy conversion is divided into electromagnetic, electrostatic and piezoelectric. This type of energy harvester has the advantages of small size, high sensing frequency, good process compatibility, and suitable for harsh environments. However, there are still output power Small size, low integration, low assembly accuracy and other shortcomings, the possibility of practical application is small

In addition, a variety of self-powered technologies based on thermal energy, wind energy, and sound energy, although the principle is novel, are mostly in the laboratory research stage, and there is still a long way to go before large-scale application

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