Component, encoding method, anti-collision method, component manufacturing method and application method

Abstract

The invention discloses a radio frequency identification tag rear-end coding component in the technical field of radio frequency signal identification and Internet of Things. The component comprises a radio frequency signal input port, a plurality of surface acoustic wave filters with different center frequencies, a plurality of high-frequency switching circuits, a plurality of radio frequency rectifiers, a digital encoder, a digital decoder and a plurality of control level maintaining circuits. The rear-end coding component has the advantages of low technical requirements on the RFID tag, low cost, strong anti-interference capability, good safety performance and the like, and can be used for RFID.

Description

technical field [0001] The invention relates to a radio frequency coding component, in particular to a radio frequency identification tag back-end coding component, and belongs to the technical fields of radio frequency signal identification and the Internet of Things. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology that automatically identifies target objects through radio frequency coded signals and is widely used in the Internet of Things. [0003] In the prior art, a unique electronic code for identifying a specific target is stored in a radio frequency identification tag (RFIDTag), and the radio frequency identification tag is attached to the identified target object. The radio frequency signal containing the identification code transmits the identification code information through the active or passive electromagnetic field, and is received and decoded by the radio frequency tag reader to identify...

AI Technical Summary

Problems solved by technology

Since the code of a specific target needs to be pre-programmed and stored in the memory of the RFID tag, the RFID tag needs to contain coded information storage elements and processing circuits, which have high technical requirements and costs; the coded information is modulated in the high-frequency electromagnetic signal When transmitting on the Internet, it will be distorted or lost due to the electromagnetic interference of the environment; at the same time, because the identification code information stored in the RFID tag may contain user privacy, and it is transmitted wirelessly between the tag and the reader, there is a certain Information security issues, and the adoption of necessary wireless security strategies will correspondingly increase the complexity of the system and the cost of tags (Song Huiying et al., "A method to effectively improve the physical layer security performance of RFID systems", Computer Engineering, 2017.05)

[0004] On the other hand, if multiple radio frequency identification tags exist in the identification area at the same time, the identification code signals of each radio frequency identification tag interfere with each other and produce a so-called data conflict, so that the radio frequency identification tag reader cannot effectively identify the radio frequency identification tag

Most of the anti-collision methods adopted by the current RFID tags are repeated queries, screening and confirmation based on various algorithms between the reader and the tags. Among them, the random algorithm based on time slot Aloha is simple and easy to implement, but there are misjudgments. Long time, low channel utilization and other shortcomings (Myung et al., "Adaptive binary splitting efficient RFID tag anti-collision", IEEE Commun Lett, 2006, 10(3), pp144-146), while the deterministic algorithm based on binary tree search By setting the stack and internal sleep counter in the tag to reduce the number of times the reader sends requests to the tag and the length of the command parameters sent by the reader each time, so as to reduce the communication traffic between the tag and the reader and shorten the identification time of the tag, Improve the anti-collision performance of the system (Gao Jinhui et al., "Binary Search Anti-Collision Improved Algorithm in RFID System", Computer Measurement and Control, 2012.20 (10), pp.2754-2756), but both RFID tags and RFID tag readers Corresponding transceiver and control circuits need to be included, which increases the structural complexity and cost of RFID tags

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