Design And Implementation Of Cold Food Logistics Traceability System For Fresh Food Based On WISP

With the increase of the national consumption level in our country,the demand for fresh food is increasing,and the quality requirements are getting higher and higher.However,at present,China's cold-chain logistics cannot meet the growing demand.The low distribution ratio of cold chain,uncontrollable transport links,and information dispersion have left huge hidden dangers to food quality and safety issues.In order to ensure that people can eat vegetables safely,it is necessary to establish effective monitoring mechanisms in all aspects of cold chain transportation.RFID technology is getting more and more attention in the field of cold chain logistics.This paper studies the current status of the application of RFID(Radio Frequency Identification)technology in the field of cold chain logistics at home and abroad,and summarizes its advantages and disadvantages.On this basis,a design scheme of cold chain logistics management system based on WISP(Wireless Identification and Sensing Platform)passive tags was proposed and implemented.The system utilizes WISP's ability to capture energy,making up for the lack of sensing capabilities of traditional passive tags and the battery maintenance drawbacks of active tags,providing some applications and ideas for RFID technology in the field of cold chain logistics.This paper also proposes a strategy to increase the capture rate of complex events for the problem that WISP nodes may lose sensitive data due to lack of energy.This strategy starts from the perspective of energy use efficiency and equates the problem of raising the rate of event capture to the problem of improving energy efficiency.Starting from the whole,the complex multi-nodes cooperation problem is equivalent to the task assignment problem,which simplifies the complexity of the problem.The theoretical analysis and experimental data show that the strategy is feasible and effective.