Design And Implementation Of Efficient And Reliable Wireless Sensing System For Food Traceability And Monitoring Applications

With the gradual improvement of China's economic level,people's quality of life has been guaranteed.But at this stage China's food fraud,excessive additives and other issues have occurred from time to time.While government departments and consumers are increasingly focusing on food safety issues.However,due to the late introduction of food traceability concepts in China,the development of monitoring and traceability system still has a large gap with developed countries.At present,the sensing system in most food traceability monitoring applications stays in the stage of being fixed in warehouses and factories,and cannot provide real-time location information of foods.In addition,the hardware equipment has high energy consumption and data collection is easy to be lost due to lack of protection.As a result,the traceability chain is relatively short and it is difficult to cover the whole logistics process,and the monitoring information is less practical.Therefore,it is necessary to design an efficient and usable wireless sensing system to provide protection for the practicality and popularization of food monitoring and traceability applications.Based on the full investigation of food traceability system and wireless sensor network communication and low energy consumption technology,this paper first proposes the overall design scheme of wireless sensing system according to the needs of the use scenario.It is described in detail from hardware selection,software functions and communication schemes.Then,according to the key problems of low energy consumption and stability of the system,some corresponding solutions are proposed.In the aspect of energy saving:we propose the low-power working mode scheduling algorithm,positioning optimization algorithm based on position prediction and dynamic data reporting algorithm based on data similarity.A limited cache management scheme based on data features is proposed from the perspective of system stability.Finally,the hardware and software implementation of the wireless sensing system is carried out,and the functional test and algorithm performance analysis are carried out to ensure that the test results are in line with expectations.With a working cycle of 10 minutes,the node can be used for about 20 days after a single charge,and the data arrival rate is above 80%.This project combines wireless sensing network,Internet of Things and other technologies to design and implement a wireless sensing system with low energy consumption and high stability.It provides food environment data,real-time positioning,and traceability of logistics information for monitoring traceability systems.The power-saving algorithm and stability strategy proposed for the key problems have been tested and analyzed by performance,and the effect is ideal,which can ensure the high practicability of food monitoring and traceability application.At present,the system has been successfully applied to enterprise users,providing traceability monitoring services for its various foods,and has high application value.