Research On RFID Location-aware Technology Of Intelligent Warehouse

With the development of large-scale integrated circuits,network communication and information security technologies in recent years,radio frequency identification technology has entered the commercial application stagein.Its location service is not only widely used in military logistics,comprehensive scientific services and commercial activities,but also has important applications in emergency rescue and disaster relief work.In order to study the wisdom of traditional warehouses and improve the solution for large-scale deployment of RFID,this thesis studies the smart warehouse location-aware technology,which aims to reduce the electromagnetic interference between the readers inside the RFID system during large-scale deployment and improve the position sensing accuracy;and reduce the collision problem of reading collision system,and propose a communication scheduling mechanism with time efficiency and energy saving.This thesis studies the location method and technology based on RFID,and analyzes the boundary virtual tag algorithm.When deploying the grid reference tag for BVIRE,it may cause RF interference and affect the accuracy of RSSI value.In this thesis,based on reader power level control and ellipse propagation model,a hybrid BVIRE algorithm based on elliptical propagation model is proposed.The simulation shows that compared with the BVIRE algorithm,the MSE value decreases by 18.2% and the RMSE value decreases by 10.8%.The H-BVIRE algorithm can provide more accurate position estimation.Analyzed the defects of binary search method such as large data redundancy and idle time slots.Combined with the grouping mechanism,bit locking,and backward strategy,the improved grouping mechanism Binary search algorithm is proposed.The simulation results show that the improved algorithm greatly reduces the data transmission amount and the number of search slots in the search process,and improves the system efficiency.As the number of tags increases,the performance of the system is more obvious.Aiming at the large-scale RFID system of intelligent warehouse,this thesis studies the query tree algorithm,analyzes the characteristics of the fast query tree algorithm and the double-slot query tree algorithm,and combines the next prefix creation mechanism and the dual-slot technology,the double-slot fast query tree algorithm is proposed.The simulations have shown that the system efficiency of large-scale RFID systems can be improved.