Ultrahigh frequency radio frequency identification device and system thereof

Abstract

The invention discloses an ultrahigh frequency radio frequency identification device and a system thereof, wherein the ultrahigh frequency radio frequency identification device is used for identifying an RFID tag on an object to be identified and comprises: a signal control unit with an opening on the top surface thereof and electromagnetic reflection material at the side surface and the bottom surface thereof; a platform, arranged on the top surface of the signal control unit and used for receiving the object to be identified; an UHF RFID antenna, arranged in the signal control unit; and an UHF RFID reader for reading the data of the RFID tag through the UHF RFID antenna. The ultrahigh frequency radio frequency identification device and the system thereof according to the invention can accurately read the RFID tag on the objects to be identified in order to avoid the erroneous reading of the RFID tag.

Description

technical field [0001] The invention relates to a radio frequency identification device, in particular to an ultra-high frequency radio frequency identification device and system. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) is a non-contact automatic identification technology. According to the frequency, RFID can be divided into four categories: low frequency (LF), high frequency (HF), ultra high frequency (UHF) and microwave (MW), and their reading ranges are different. The typical frequency of HF RFID is 13.56MHz, and its reading range is within 1 meter. It can be applied in the field of short-distance item identification such as libraries and drug identification. The frequency of UHF RFID is 860-960MHz (regulations vary from country to country). Among them, passive UHF RFID has a reading range of up to 10 meters and is mainly used in logistics supply chain, retail, national defense and other fields. [0003] Compar...

AI Technical Summary

Problems solved by technology

[0004] The biggest difficulty in using UHF RFID in the field where HF RFID is originally applied is to control the signal reading area

The reading range of UHF RFID is too large under the condition of large output power to cause misreading. In addition, compared with HF RFID, the environment has a greater impact on UHF RFID, which is prone to signal reflection and refraction, so it will read some unnecessary RFID label, causing fatal errors in the application

For example, in the field of libraries, if the reading range of UHF RFID is too large, the UHF RFID reader may read another reader's RFID reader card or books with RFID tags when borrowing and returning books, causing misreading ;In terms of security and anti-theft, the UHF RFID security detection door may cause false alarms due to the long reading distance

[0005] In view of the above-mentioned defect that the use of UHF RFID in the field of short-range identification cannot control the signal reading area, the inventor proposes an ultra-high frequency radio frequency identification device and system, which can avoid the above-mentioned shortcomings, and make UHF RFID in the field of short-range identification more practical in

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