WSN node self-power supply system based on solar-wind energy complementarity

Abstract

The invention discloses a wireless sensor network (WSN) node self-powered system based on solar energy-wind energy complementation. The system mainly comprises a solar energy acquisition module, a piezoelectric type vertical axis wind energy acquisition module, a super-capacitor energy storage module and an interface circuit, wherein the solar energy acquisition module acquires luminous energy in the environment through a solar cell panel, the piezoelectric type vertical axis wind energy acquisition module acquires wind energy in the environment, the super-capacitor energy storage module stores the acquired energy into a super capacitor, and the interface circuit provides a channel for energy storage and WSN node power supply. In addition, in order to improve acquisition efficiency of the wind energy acquisition module and reduce influences of a wind direction, a vertical axis piezoelectric type scheme is adopted by the wind energy acquisition module. Due to the facts that rechargeable times of a lithium cell are limited, and in the process of acquisition of environmental energy, charging and discharging are frequent, the super capacitor in the system is used for replacing the lithium cell to serve as a system energy storage unit, and the service life of the energy storage unit can be prolonged. The WSN node self-powered system can collect energy in the environment, does not need to conduct maintenance on a cell, such as cell replacement and charging, therefore prolongs service life of a node, and solves the energy supply problem of a WSN.

Description

technical field [0001] The invention belongs to the technical field of communication and broadcasting, and relates to a self-powered device for a WSN (Wireless Sensor Network) node based on solar-wind energy complementation, which is mainly used for energy self-supply of the WSN node. Background technique [0002] With the development of wireless sensor network technology, wireless sensor network is widely used in military, aviation, explosion-proof, disaster relief, environment, medical treatment, health care, home furnishing, industry, commerce, etc. field. A wireless sensor network is a wireless network composed of a large number of stationary or moving sensors in a self-organizing and multi-hop manner. user. [0003] Traditional wireless sensor network nodes usually use dry batteries or rechargeable batteries to provide energy, but due to the limited capacity of batteries, the batteries need to be replaced or charged regularly. However, when the number of sensor nodes...

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Problems solved by technology

[0006] Some existing node self-power supply systems, such as the patented "Photovoltaic-Temperature Micro Energy and Wireless Sensor Network Node Integrated Autonomous Microsystem" are based on photovoltaic and temperature difference environmental energy collection, but these two kinds of energy can only be generated when there is light. Therefore, it cannot play a complementary role; the patent "a self-powered microsystem integrating photovoltaic energy and sensor nodes" only uses lithium batteries as energy storage units, which limits the service life and use environment of the self-powered system; the patent "Wireless sensor network nodes powered by piezoelectric generators" proposes a self-powered system based on vibration energy harvesting, but due to the low energy density of vibration energy, it is only suitable for some occasions with strong vibration

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