Read-write device and read-write method of radio frequency tag

Abstract

The invention provides a read-write device and a read-write method of a radio frequency tag, which can meet industrial field requirements. The read-write device of the radio frequency tag comprises a write-in module and a reading module, wherein the write-in module adopts a near-field low-frequency radio frequency signal to write in the radio frequency tag; and the reading module adopts a far-field high-frequency radio frequency signal to carry out scanning type reading on the radio frequency tag, and the reading module further comprises a power regulator which is used for regulating the transmitting power of the reading module from high to low in the reading process. According to the technical scheme, different characteristics of the radio frequency tags with different frequencies are utilized to prevent miswriting, the radio frequency tags in a non-working range are eliminated by utilizing different powers and different wave beam directions, the read-write reliability of the radio frequency tags is improved to a very high level, and automatic management of in-warehouse and out-warehouse can be completely achieved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a read-write device and a read-write method for a radio frequency tag. Background technique [0002] The application of passive RF tags has been very popular, but because the energy of passive tags comes from remote wireless transmission, when the direction of the tag antenna is not coupled with the polarization direction of the arriving RF signal, it will fail, and it is impossible to read and write signals. react correctly. Simply increasing the radio frequency transmission power and increasing the polarization direction can alleviate the problem of missed reading, but it will lead to misreading or miswriting of tags that are not expected to be processed outside the working range, resulting in the failure of inbound and outbound management. [0003] The method to solve the above problems in the prior art is to build a radio frequency shielding room at the reading and wri...

AI Technical Summary

Problems solved by technology

Although this approach can solve most of the problems, the input cost is relatively high, and the requirements for the production line area are very high, which cannot be met at the industrial site.

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