Radio frequency tag read-write device, system and method, and frequency modulation antenna

Abstract

The invention provides a radio frequency tag read-write device, system and method, and a frequency modulation antenna. The radio frequency tag read-write device comprises: a signal generation device which is controlled to generate a radio frequency tag read-write signal through one of a plurality of frequency points in the same preset working frequency band; at least one frequency modulation antenna controlled to be switched among different frequency points of the same working frequency band and used for transmitting the read-write signal and receiving a corresponding response signal; a multiplexer controlled to pass through the read-write signal and the response signal in a time division duplex mode; and a read-write module used for controlling the signal generation device to switch among the multiple frequency points in a polling manner so as to correspondingly generate read-write signals of different frequency points, synchronously controlling the multiplexer to pass through the read-write signals of the frequency points, controlling the frequency modulation antenna to switch to work at the frequency points, and analyzing and outputting the response signal to a control center. When the radio frequency tag offsets frequency, different frequency point read-write signals are transmitted in a polling mode, and the problem of offset frequency of the radio frequency tag is solved.

Description

technical field [0001] The invention relates to the field of radio frequency technology, in particular to a radio frequency tag reading and writing device, a radio frequency tag reading and writing system, a radio frequency tag reading and writing method and a frequency modulation antenna. Background technique [0002] At present, radio frequency technology is widely used in all walks of life. By reading and writing radio frequency tags, it can realize the identification of goods, books and identity, and build the basic project of the Internet of Things. For example, set up a security gate at the exit of the supermarket to detect whether the goods carried by the customer have completed the payment procedure; set up security gates at the entrance of the conference, the entrance of the library, the entrance of the exhibition hall and the entrance of the company, and verify whether the person carrying or wearing the radio frequency tag has authority through the security gate En...

AI Technical Summary

Problems solved by technology

[0004] As a result, the safety door or smart bookshelf will only emit radio frequency signals corresponding to the frequency points of the unshifted radio frequency tags, thus failing to effectively identify all radio frequency tags, resulting in economic losses or potential safety risks

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