A multi-frequency multi-target selective wireless energy transmission method and system

Abstract

The invention discloses a multi-frequency and multi-target selective wireless energy transmission method and system, belonging to the technical field of electromagnetic wave wireless energy transmission. The method of the present invention includes the following steps: constructing a receiving device group and a transmitting device group of a multi-frequency energy transmission system; discretizing the energy transmission bandwidth range adopted by the system according to the measured maximum multipath time delay in the energy transmission environment, and extracting the output The energy transmission channel parameters of the energy system at each frequency point; according to the extracted energy transmission channel parameters and calculation formulas, select the best energy transmission frequency point; use the optimization algorithm to determine the optimal feed signal corresponding to the selected frequency point to achieve multi-objective Selective parallel energy delivery. The invention solves the problem that it is difficult to balance energy transmission efficiency and side lobe value in the existing multi-objective selective energy transmission technology and method, and realizes high-efficiency, low-side-lobe multi-objective selective parallel energy transmission.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave wireless energy transmission, and in particular relates to a multi-frequency and multi-target selective energy transmission method and system. Background technique [0002] Wireless Power Transfer (WPT) is a research frontier in the current field of energy transmission, and it is also a research hotspot that has attracted much attention from the scientific and industrial circles in recent years. Compared with wired energy transmission, WPT can completely get rid of the shackles of power transmission cables, and can provide uninterrupted energy supply to electronic equipment anytime, anywhere, conveniently and flexibly around the clock. It is a revolutionary energy transmission technology that can be widely used In various fields of the national economy, its scientific research significance and application value are no less than today's wireless communication technology. [0003] At p...

AI Technical Summary

Problems solved by technology

An invention patent with the application patent number CN201810580731.6 discloses a method of frequency division multiple access to realize the selective energy transmission of multiple transmitting devices to multiple energy targets. This method uses different frequency signals to different The energy transmission of the powered target can realize the independent energy transmission of each target in the multi-target, so when the parallel energy transmission is performed on the selected multiple targets, almost no side lobes are generated, but each powered antenna can only receive Specified single frequency energy, the energy of other frequency points at the position of the powered antenna is greatly wasted, which reduces the efficiency of multi-target energy transmission

[0005] To sum up, the current multi-target selective wireless energy transmission method still has some inherent defects, and it is difficult to take into account the low side lobe and high energy transmission efficiency in the case of arbitrary multi-target selective energy transmission.

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