A time-reversal wireless energy transmission system and method based on low sampling rate

Abstract

The invention discloses a low sampling rate-based time reversion wireless energy transmission system and method. An energy transmission device in the system comprises a master controller, a detectionsignal generation device and a reverse signal generation device, the device to be energy-transmitted comprises a passive chip, a switch circuit, an energy storage capacitor and a rectification matching module, the master controller is connected with the detection signal generation device and the reverse signal generation device, the detection signal generation device and the reverse signal generation device both are in wireless connection with the device to be energy-transmitted, the passive chip is connected with the rectification matching module and is connected with an energy storage capacitor via the switch circuit, an analog-to-digital conversion module in the reverse signal generation device comprises a plurality of low-rate analog-to-digital converter, the digital-to-analogue conversion module, a first digital signal processing module, a time reversion module, a second digital signal processing module and the analog-to-digital conversion module are sequentially connected, and the analog-to-digital conversion module comprises the plurality of low-rate digital-to-analogue convertors. The system is easy to implement, is low in cost, far in transmission distance and high in efficiency.

Description

technical field [0001] The present invention relates to the technical field of wireless energy transmission, in particular to a time-reversed wireless energy transmission system and method based on a low sampling rate. Background technique [0002] With the popularization of mobile devices and the development of the Internet of Things, traditional wired energy transmission methods have been unable to meet people's needs. Wireless energy transmission has become one of the important modules in many mobile applications, especially for some special cases where batteries cannot be replaced. For example, embedded micro-devices implanted in the human body, wireless energy transmission is the only convenient and effective way of energy supply. [0003] There are three ways to realize wireless energy transmission. One is the coil inductive wireless power transmission technology based on the theory of vortex electromagnetic field. It relies on the electromagnetic induction between the...

AI Technical Summary

Problems solved by technology

Nowadays, wireless energy transmission in the form of electromagnetic wave radiation has the problems of low transmission efficiency and short transmission distance

[0004] In recent years, in order to solve the problems of low transmission efficiency and short transmission distance, some scholars have proposed a new wireless energy transmission technology based on time-reversal electromagnetic wave transmission. Using this technology, electromagnetic waves can realize time and space in complex multipath environments. Synchronous focus, with this feature to improve the transmission efficiency and transmission distance of wireless energy transmission, and realize simultaneous charging of multiple devices without complex positioning system

Because in the time-reversal wireless energy transmission system, the use of broadband high-frequency signals can obtain better focusing effect and energy transmission efficiency, therefore, at present, in the time-reversal wireless energy transmission system, the time Before and after inversion processing, high-speed AD / DA conversion devices are usually used, which makes the realization of wireless energy transmission system difficult and costly

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