Technical Evaluation Of UHF RFID Tags Application In Intelligent Clothing Packaging Management

Jiangsu Dan Mao Textile Technology Co.,Ltd.uses bar code technology as the measures of clothing storage and logistics management,which has the disadvantages of long time,low accuracy and data delay.In addition to the traditional physical tag technology and bar code technology,Ultra High Frequency Radio Frequency Identification technology is a more convenient and quick recognition.It can identify multiple tags with a fast algorithm.It also has the function of locating source and high stored information,and help to solve the characteristics of slow distribution of clothing management and realize the dynamic control of network management in supply chain.However,the commercial RFID tags used in garment intelligent packaging have short reading distance and poor flexibility,so that it is difficult to guarantee the life-long management needs of the products.Moreover,the accuracy of the tag reading is not satisfied with the logistics management and efficient reading requirements of textile products.It is necessary to start with the actual packing and transportation process of clothing products,and study the influence of clothing packing conditions and the spatial location of tags and readers in packaging process on the reading distance of UHF RFID tags.In view of the technical obstacles in the application of the existing intelligent tag technology in the logistics management of garment enterprises,the subject uses UHF RFID tag as information recognition carrier to study the influence of the garment packing condition and reading mode on the reading performance of the radio frequency tag,and factors influencing the performance of tag reading in smart packaging management of clothing.The specific research contents and conclusions are as follows:(1)To study the influence of the packing condition of the enterprise on the reading performance of UHF RFID tags,such as the packing method,the thickness of the box wall(the thickness of the box board)and the thickness of the garment stacking,it is found that there is a significant difference between the tag reading performance and the packing condition.Among them,the packing method using left and right stacking is larger than the tag reading in the upper and lower stacking ways,and the former is more suitable for the standard packing of the enterprise garment.At the same time,the thickness of the box board has less influence on the reading distance,and the thickness of the garment stack reaches a certain value of the box height,and the attenuation rate of read distance increases rapidly.The maximum read distance under the standard box and reading condition is 3.7m.Based on the problem of manually checking the number of clothes under different packing conditions,the experiment is carried out.First,the UHF RFID system is used to test the read distance of single tag and multi tag under different clothing packing modes.Then,through changing the thickness of the carton,we tested the reading distance of UHF RFID tags behind each package.Finally,by changing the ratio of the thickness to the height of the box,we measured and calculated the attenuation percentage of the reading distance of the tag and analysis the influence of the different stacking thickness on the reading performance of the tag.(2)By studying the influence of reading mode on the reading performance of UHF RFID tags,we found that the polarization direction of the tag antenna is no more than 30 degrees relative to the polarizing direction of the reader antenna at the 1.5 meters reading distance,and the reader antenna cannot over 15 degrees in the space rotation angle.We carried out assessment methods to the feasibility of applying UHF RFID tag in packaging?We carried out the corresponding experiments on the angle of the UHF RFID tag relative to the reader's polarization direction in the process of transportation inspection.Under the condition of the plane of the tag is in accordance with the level of the packing box and the coordinate tag of the box rotated in different angles,we test change of the reading distance of the UHF RFID tag at different angles by using the angle of the polarization direction of the tag antenna relative to the polarization direction of the reader antenna as variable factor.Secondly,in order to ensure the electromagnetic field of the reader and writer antenna covers the maximum space area of the tag during the transmission process,we change the angle of the reader antenna in the space rotation,and make the angle of the polarization direction of the reader antenna is relative to the polarization direction of the tag antenna as the variable factor,and test the read distance variation of UHF RFID tags under the rotation angle of the reader antenna.In summary,dealing with the technical obstacles in the implementation of logistics management in garment enterprises,the reading performance of fabric based on UHF RFID tag in the application of garment intelligent packaging is studied and evaluated by changing the packing conditions and reading ways of the existing intelligent tag technology.The results show that the tag reading distance measured by the left and right stacked packing is more suitable for the standard packing of the enterprise garment.The thickness of the box board has little influence on the reading distance,and the thickness of the garment stack reaches a certain value,and the decline speed of the reading distance is increased,and the standard box of the enterprise and the standard box of the enterprise are increased.The maximum read distance determined by read condition is 3.7m.At the same time,under the 1.5 meters reading distance,the polarization direction of the tag antenna is not more than 30 degrees relative to the polarizing direction of the reader antenna,and the read-writer antenna cannot over 15 degrees in the space rotation angle.