Design And Realization Of The Traceability System Of Agricultural Products Based On The Internet Of Things

Food safety issues are emerging one after another,and more and more consumers will pay more attention to information such as the source of food when buying food.How to enable consumers to buy safe and secure food is becoming more and more important.With the advent of the Internet of Things era,food traceability has also entered an era of rapid development.Food can be traced through the Internet of Things technology,so that consumers can understand and feel more at ease about the food they buy.This paper mainly develops a traceability system for agricultural products,which is used to solve the problem of data traceability when consumers purchase agricultural products and ensure the accuracy and consistency of the data.Among them,the data collection is realized by using RFID tags,by improving RFID anti-collision algorithm,the speed and accuracy of data acquisition under multi-tag collision are improved.And the data is stored using blockchain technology.and the PBFT consensus algorithm in the blockchain is improved.Improve the efficiency of data reading.The two technologies are integrated through the entire traceability system to form an efficient and safe agricultural product traceability system.When RFID tags are used for data collection,the data collection speed of a single tag is faster.However,once the number of tags in the range of RFID reader is multiple,the reading speed of tags will be reduced and the identification error will occur.In order to solve this problem,the deterministic collision algorithm is more suitable for the use of this system.But the traditional deterministic collision algorithm in solving the problem of tag collision efficiency is relatively low,in order to solve this problem,this paper proposes a dynamic splitting mechanism based on quadtree anti-collision algorithm,the binary tree deterministic collision algorithm,on the basis of the introduction of quadtree splitting mechanism,reduce use split depth and slot number.By optimizing the collision mechanism of slot nodes,the repeated nodes are read by leaps,so as to reduce the number of slots used and improve the hit probability of labels.Thus,the reading time of RFID tags is reduced,the reading efficiency is improved,and the speed of the whole transportation is improved.The data in the traceability system is the most important part of the system.In order to make the data more secure and not easy to be modified,the data is stored in the way of the block chain of the traceability data in the system.Blockchain has more advantages in data consistency and security.Once problems occur in agricultural products,it can more accurately trace the source of data and find the source.In this paper,the PBFT consensus mechanism of the blockchain is improved.By introducing a two-tier structure to replace the traditional single-tier block architecture,the block nodes have higher extensibility.In addition,the block coordination technology is introduced to coordinate the primary key layer in the two-tier structure,avoid block failures,and improve the security and consistency of data storage.After improvement,the PBFT consensus mechanism has improved the data processing speed,security,extensibility and other aspects.Finally,the functional stability of each subsystem functional module of this system development was tested.According to the test results,the relevant data of agricultural products can be obtained effectively and accurately when the agricultural products are traceable.It shows that the agricultural product traceability system described in this paper can play a good role in the current agricultural product safety traceability.