Research And Application On Detection Technology Of Moving Multi-tag RFID System

With the continuous development of modern information technology,RFID technology plays a significant role in various industries with its unique advantages,especially in the field of modern logistics and warehousing management.The introduction of RFID technology has realized the rapid automatic identification of materials.However,when the object carrying multiple tags passes through the reader with a rapid speed,the phenomenon of individual tags being undected occurs occasionally in the process of logistics management.Therefore,researching and developing efficient identification methods and systems suitable for the application scenarios of moving multi-tag identification is of great practical significance,which can improve the detection efficiency of RFID technology in logistics management and other related applications.This thesis focuses on the research of moving multi-tag detection technology and the development of efficient detection system.The specific work is as followsIn the first part,we researched the moving multi-tag detection technology.The detection characteristics of moving multi-tag RFID system are analyzed and the existing problems are summarized.Then three implementation methods of tag's pre-activation technology are summarized according to the detection mechanism of RFID passive tags,and a beam scanning antenna for tag's pre-activation is designed.On this basis,an antenna signal coverage prediction software is developed to provide technical support for the optimal design of antenna position in a multi-channel system.The above work is verified by simulation or experiment,which lays a foundation for the development of the following multi-channel detection system.In the second part,a main-auxiliary six-channel RFID detection system is developed by using the tag's pre-activation technology and multi-antenna signal coverage prediction technology.The system consists of six channels,of which four main channels are used to realize the detection of tags' information and two auxiliary channels are used to pre-activate and charge the moving multi-tag.The positions of six antennas are optimized after the signal coverage prediction,which well meet the signal coverage requirements The system composition,hardware and software design schemes,system building and test results are given in detail.The test results show that the proposed RFID detection system based on auxiliary-channel pre-activation technology can effectively improve the detection efficiency of tags.In a word,in order to solve the problem of tags' leakage reading in the process of moving multi-tag identification,we proposed the tag's pre-activation technology,developed the antenna signal coverage prediction software and designed the main-auxiliary six-channel RFID detection system.The above work provides a new solution for the application of RFID technology in logistics management and other industrial fields.