Research On Key Technologies Of Embedded Web Service Intelligent Food Safety Monitoring Node

Food safety is an important issue involving human existence and development.Inrecent years, food safety events occurred frequently and caused adverse social effect,thus the need for improving the informationization and intelligence level of monitoringand management of food security is imminent.Food distribution involves multipleaspects of food production，processing，transportation, storage, marketing, etc, whichare all affected by the outside temperature, humidity, microorganisms and otherenvironmental factors,and gradually losing its original quality at a certain speed.Evaluation of food quality not only need to know the initial state of the food, but alsoneed to dynamic assess and predict food status according to the environmental changes.This thesis discusses intelligent solutions for food safety starts from thecharacteristics of food safety real-time monitoring,status assessment and predictionnetwork.Based on above,This thesis constructs the embedded web service intelligentfood safety monitoring node, Unlike the traditional traceability system which based onthe bar code or RFID tag, the proposed intelligent monitoring network has the ability tomonitor the environmental factors influencing food quality,evaluate the the current stateof food quality and predict further safety state.Firstly, the key technologies of intelligent food safety monitoring network areanalyzed and in this thesis, then, a design proposal for intelligent food safety monitoringnetwork is put forward. The hardware of the intelligent node uses CC2530F256seriesmicrocontroller as the core control unit and RF unit. other peripheral modules such asLCD, buzzer are designed to achieve the display, query, automatic alarm function.Then, in order to meet the demand of many intelligent monitoring nodes connect tothe Internet and overcome the shortage of the RFID system point-to-pointcommunication mode,This thesis propose a lightweight network protocol stack on the intelligent monitoring node. Given the large number of intelligent monitoring nodecharacteristics, IPv432-bit address space can not meet intelligent node’s IP addressneeds, IPv6has a huge address space and stateless autoconfiguration, good mobilitysupport features, IPv6is the perfect solution for a wide range of intelligent monitoringnodes access to the Internet. However, due to the intelligent monitoring node usingIEEE802.15.4underlying protocol standards, standard IPv6protocol stack can notdirectly running on the intelligent monitoring node.After in depth study the IPv6,6LoWPAN draft standards, This thesis designs a lightweight IPv6protocol stack forintelligent monitoring node based on the uIPv6and6LoWPAN protocol stack providedby the open source operating system Contiki and ultimately realizes seamlessconnection between intelligent monitoring network and IPv6network.Finally, Based on the research REST architectural style and the essentialcharacteristics of the web service, This thesis build a lightweight web servicearchitecture for embedded intelligent monitoring node,the proposed architectureprovides a lightweight way to realize of intelligent monitoring network.This thesis completes the intelligent monitoring network connectivity and webservice architecture testing.The experimental results show that the proposed lightweightIPv6protocol stack realizes seamless connection between intelligent monitoringnetwork and IPv6network. besides. the proposed architecture makes resources andinteractive behavior more uniform. The end of the thesis summaries the main work ofthe thesis and gives the expectation.