Device for providing electric energy for multiple passive electronic tags in large-range space

Abstract

The invention discloses a device for providing electric energy for a plurality of passive electronic tags in a large-range space, which comprises a transmitting end and a receiving end, and is characterized by further comprising four middle ends, the transmitting end and the receiving end are coupled and connected through electromagnetic induction, and the four middle ends are distributed by taking the transmitting end as the center. And the four middle ends are coupled with the transmitting end in an electromagnetic induction manner. A traditional high-frequency radio frequency identification system is limited in power supply direction, short in power supply distance and low in degree of freedom, and the device adopts a magnetic coupling resonance wireless power transmission technology, a segmented compensation technology, an auxiliary coil resonance network and a dynamic tuning technology, so that the device generates a relatively uniform high-frequency alternating-current electromagnetic field in a large-range space; a plurality of passive electronic tags can obtain electric energy at any position in the space, and a power supply area can be expanded to dozens of cubic meters.

Description

technical field [0001] The invention relates to the field of wireless power transmission, in particular to a device for providing power for multiple passive electronic tags in a large space. Background technique [0002] In recent years, with the continuous development of the Internet of Things, RFID technology that connects identifiable objects to the Internet has been widely used in scenarios such as packaging retail, item positioning, intelligent transportation, security access control, warehousing and logistics, asset management, and library borrowing systems. The application of the Internet of Things has become one of the important technologies for the development of the Internet of Things. Usually, the RFID system is mainly composed of electronic tags, readers, and computers and their application software. Typical operating frequencies are: 125 / 134.2kHz (low frequency), 6.78 / 13.56MHz (high frequency), 860 / 960MHz (ultra high frequency), 2.4GHz and 5.8GHz (microwave). ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device that provides electric energy for multiple passive electronic tags in a wide range of space to solve the problem of limited power supply direction and power supply distance of passive electronic tags in the high-frequency band existing in the prior art. Short, low degree of freedom, loss of passive electronic tags means loss of positioning function, multiple passive electronic tags cannot supply power at the same time, etc.; solve device selection and circuit design caused by too high frequency in UHF or microwave systems Complexity, low transmission power, etc.

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