Design and Implementation of Cold Fresh Beef Traceability System Based on Blockchain Technology
Beef cold chain traceability has difficulties such as difficult detection,centralized information,long traceability time,non-trans-parent meat information,and non-uniform verification methods.The use of blockchain ledger decentralization,non-tampering,data transpar-ency and other characteristics can solve the above problems.Cold chain data is collected through IoT devices,and blockchain CA is used to re-alize device authentication and ensure reliable source data.Based on Hyperledger Fabric,it builds a coalition chain network with supervisory nodes,and utilizes smart contracts to complete data verification and chain code supervision.At the same time,by adopting a variety of storage technologies,the read/write efficiency of the blockchain network is effectively improved.Taking the cold beef cold chain as an example,the blockchain parameters are tuned and tested under the premise of meeting the resource utilization requirements.The results show that the aver-age transaction throughput of the whole node network is 154 TPS(tx/s),and the average maximum transaction latency is 0.14 s.The average transaction throughput of the subchain reaches 270 TPS,the average maximum transaction latency is 0.084 s,and the concurrent processing transaction throughput ranges from 200 TPS to 500 TPS.While meeting the traceability requirements of the traceability system,it provides technical support for intelligent quality preservation storage and transportation of chilled beef.
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