Wireless charging system of wireless sensor network

Abstract

The invention provides a wireless charging system of a wireless sensor network. The wireless charging system is formed by a base station and multiple wireless sensor nodes. Each wireless sensor node is provided with a first controllable resonant antenna, a rectification filtering module, a voltage stabilization module, a power supply management module, an energy storage module, a first microprocessor, a first wireless communication module and a sensor, wherein the first microprocessor makes a charging decision on the basis of electric quantity information reflected as feedback by the power supply management module, and controls on or off of a control switch S1 and a control switch S2 of the first controllable resonant antenna, thereby controlling the wireless sensor node to freely switch among three states including reception, relay and silence and increasing the transmission range of wireless power supplying of a wireless sensor network. Meanwhile, smart, quick and highly efficient charging can be achieved on the basis of capability supply needs of the nodes, the influence among multiple resonant nodes can be eliminated, and then the transmission efficiency and the transmission power are steady.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a wireless charging system for wireless sensor networks. Background technique [0002] The wireless sensor network is composed of a large number of sensor nodes deployed in the monitoring area. These sensor nodes integrate various modules such as information collection, data processing, and wireless communication. Through these nodes, various parameters in the area can be effectively detected. However, with the deepening of wireless sensor network research and the increase of applications, there are some problems to be solved urgently, the most critical of which is the problem of node energy supply. At present, most wireless sensor nodes are powered by batteries. On the one hand, limited by the small size of sensor nodes, the energy of the configured batteries is very limited, which cannot meet the long-term work requirements of the network, resulting in frequent failure o...

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Problems solved by technology

[0005] This application provides a wireless charging system for a wireless sensor network to solve the problem that the wireless sensor network has a limited power supply range, cannot provide intelligent power supply according to the supply requirements of each sensor node, and the resonant state is affected by multiple receiving resonant nodes being too close together. The resonant frequency will also shift, resulting in technical problems such as wireless power transmission efficiency and power reduction

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