本文選題：食品安全 + 嵌入式系統(tǒng)��； 參考：《上海海洋大學(xué)》2014年碩士論文

【摘要】：食品安全問題是關(guān)系到人類生存發(fā)展的重要課題，近年來，頻繁發(fā)生的食品安全事件造成了不良的社會(huì)影響，提高食品安全監(jiān)測管理信息化、智能化水平已經(jīng)迫在眉睫。食品流通涉及到食品生產(chǎn)、加工、運(yùn)輸、貯藏、銷售等多個(gè)環(huán)節(jié)，食品每個(gè)環(huán)節(jié)都會(huì)受到外界溫度、濕度以及微生物群等環(huán)境因素的影響，逐漸以一定的速度和方式喪失其原有品質(zhì)。評(píng)價(jià)食品的品質(zhì)不僅需要了解食品的初始狀態(tài)，，而且需要根據(jù)食品的環(huán)境變化實(shí)時(shí)動(dòng)態(tài)地評(píng)估與預(yù)測。 本文從食品安全實(shí)時(shí)監(jiān)測、安全狀態(tài)評(píng)估和預(yù)測網(wǎng)絡(luò)的實(shí)際特點(diǎn)出發(fā)，綜合運(yùn)用物聯(lián)網(wǎng)技術(shù)、web service技術(shù)等探討基于食品安全監(jiān)測的智能化解決方案。設(shè)計(jì)并實(shí)現(xiàn)一種基于嵌入式web service技術(shù)的食品安全智能監(jiān)測節(jié)點(diǎn)，區(qū)別于傳統(tǒng)意義上的以條碼或RFID標(biāo)簽為基礎(chǔ)的食品安全溯源系統(tǒng)，本文食品安全智能監(jiān)測網(wǎng)絡(luò)具有實(shí)時(shí)監(jiān)測影響食品品質(zhì)的環(huán)境因素，并對(duì)食品品質(zhì)的當(dāng)前狀態(tài)進(jìn)行評(píng)估和預(yù)測進(jìn)一步的安全狀態(tài)的能力。 本文首先對(duì)食品安全智能監(jiān)測網(wǎng)絡(luò)的關(guān)鍵技術(shù)進(jìn)行深入的分析，提出了食品安全智能監(jiān)測網(wǎng)絡(luò)的總體架構(gòu)，設(shè)計(jì)并實(shí)現(xiàn)了智能監(jiān)測節(jié)點(diǎn)的硬件平臺(tái)。智能監(jiān)測節(jié)點(diǎn)的主控芯片采用集微處理器和射頻功能于一體的CC2530F256，控制外圍模塊以及溫度數(shù)據(jù)信息的采集、處理和發(fā)送等。其他外圍模塊包括日歷時(shí)鐘、液晶顯示、蜂鳴器報(bào)警等，用以實(shí)現(xiàn)顯示、查詢、超出閾值時(shí)自動(dòng)報(bào)警等功能。 然后，為滿足大范圍內(nèi)多智能監(jiān)測節(jié)點(diǎn)靈活接入互聯(lián)網(wǎng)的需求，克服通常意義下RFID系統(tǒng)點(diǎn)對(duì)點(diǎn)通信模式的不足，本文在智能監(jiān)測節(jié)點(diǎn)上構(gòu)建輕量級(jí)網(wǎng)絡(luò)協(xié)議棧。鑒于實(shí)際應(yīng)用中智能監(jiān)測節(jié)點(diǎn)數(shù)量龐大的特點(diǎn)，IPv4的32位地址空間無法滿足智能節(jié)點(diǎn)關(guān)于IP地址資源的需求，下一代網(wǎng)絡(luò)通信協(xié)議IPv6具有巨大的地址空間以及無狀態(tài)自動(dòng)配置、良好的移動(dòng)性支持等特點(diǎn)，是大范圍內(nèi)多智能監(jiān)測節(jié)點(diǎn)靈活接入互聯(lián)網(wǎng)的完美解決方案。但由于智能監(jiān)測節(jié)點(diǎn)底層采用IEEE802.15.4協(xié)議，無法直接將標(biāo)準(zhǔn)的IPv6協(xié)議棧運(yùn)行在智能監(jiān)測節(jié)點(diǎn)上。因此，本文在深入研究IPv6、6LoWPAN的標(biāo)準(zhǔn)草案之后，依托Contiki操作系統(tǒng)設(shè)計(jì)一種智能監(jiān)測節(jié)點(diǎn)的輕量級(jí)IPv6網(wǎng)絡(luò)協(xié)議棧，完成智能監(jiān)測節(jié)點(diǎn)與應(yīng)用主機(jī)間端到端的通信，最終實(shí)現(xiàn)智能監(jiān)測節(jié)點(diǎn)與IPv6網(wǎng)絡(luò)間的無縫融合。 最后，在研究REST架構(gòu)風(fēng)格和web service本質(zhì)特征基礎(chǔ)之上，將REST架構(gòu)風(fēng)格的設(shè)計(jì)思想引入到智能監(jiān)測網(wǎng)絡(luò)中，提出一種嵌入式智能監(jiān)測節(jié)點(diǎn)的輕量級(jí)web service架構(gòu)，將智能監(jiān)測節(jié)點(diǎn)提供的若干服務(wù)抽象為資源，為智能監(jiān)測網(wǎng)絡(luò)的實(shí)現(xiàn)提供一種輕量化的實(shí)現(xiàn)途徑。 文中最后在智能監(jiān)測網(wǎng)絡(luò)的平臺(tái)上完成對(duì)智能監(jiān)測節(jié)點(diǎn)與IPv6網(wǎng)絡(luò)的互通性、智能監(jiān)測節(jié)點(diǎn)輕量級(jí)web service架構(gòu)的測試與驗(yàn)證。結(jié)果表明，實(shí)現(xiàn)了智能監(jiān)測節(jié)點(diǎn)與IPv6網(wǎng)絡(luò)間的無縫融合，通過統(tǒng)一的訪問接口，能夠完成對(duì)智能監(jiān)測節(jié)點(diǎn)數(shù)據(jù)資源的可視化訪問。文中最后對(duì)本文所做的工作進(jìn)行總結(jié)，并對(duì)下一步工作提出展望。
[Abstract]:Food safety is an important issue related to human survival and development. In recent years, frequent occurrence of food safety incidents has caused bad social impact, and it is imminent to improve the information of food safety monitoring and management. Food circulation involves food production, processing, transportation, storage, sales and so on. Each link will be affected by environmental factors such as temperature, humidity and microorganism, and gradually lose its original quality in a certain speed and way. Evaluation of the quality of food needs not only to understand the initial state of the food, but also to evaluate and predict the food in real time according to the changes in the food environment.
This paper, starting from the real time monitoring of food safety, the safety status assessment and the actual characteristics of the forecast network, comprehensively uses the Internet of things technology, web service technology to discuss the intelligent solution based on food safety monitoring, and designs and implements a kind of intelligent monitoring node of food safety based on Embedded web service technology, which is different from the traditional idea. As a food safety traceability system based on bar code or RFID label, the food safety intelligent monitoring network can monitor the environmental factors that affect the quality of food in real time, and evaluate the current state of food quality and predict the ability of further safety.
This paper first analyzes the key technology of the intelligent monitoring network for food safety, puts forward the overall framework of the intelligent monitoring network for food safety, designs and implements the hardware platform of the intelligent monitoring node. The main control chip of the intelligent monitoring node adopts the CC2530F256 which integrates the microprocessor and the radio frequency function to control the peripheral modules. And the collection, processing and sending of temperature data. Other peripheral modules include calendar clock, liquid crystal display, buzzer alarm and so on, which can be used to realize display, query, automatic alarm and other functions when the threshold is beyond the threshold.
Then, in order to meet the need of flexible access to the Internet in a large range of multi-intelligent monitoring nodes and overcome the shortcomings of the point to point communication mode of the RFID system in the usual sense, this paper constructs a lightweight network protocol stack on the intelligent monitoring node. In view of the large number of intelligent monitoring nodes in the actual application, the 32 bit address space of the IPv4 can not be full. The requirement of IP address resources for the foot intelligent node, the next generation network communication protocol IPv6 has a huge address space, a stateless automatic configuration, good mobility support and so on. It is a perfect solution for the flexible access to the Internet in a large range of multi-intelligent monitoring nodes. However, the IEEE802.15.4 association is adopted at the bottom of the intelligent monitoring node. The standard IPv6 protocol stack can not be run directly on the intelligent monitoring node. Therefore, after studying the draft standard of IPv6,6LoWPAN, this paper designs a lightweight IPv6 network protocol stack of intelligent monitoring nodes based on Contiki operating system, and completes the communication between the intelligent monitoring node and the end to end of the application host, and finally realizes the intelligence. It can monitor seamless integration between nodes and IPv6 networks.
Finally, based on the study of REST architecture style and the essential features of web service, the design idea of REST architecture style is introduced into the intelligent monitoring network, and a lightweight web service architecture for embedded intelligent monitoring nodes is proposed. Some services provided by intelligent monitoring nodes are abstracted as resources, and the implementation of intelligent monitoring network is provided. A lightweight approach.
At last, the intercommunication between intelligent monitoring node and IPv6 network is completed on the platform of intelligent monitoring network, and the lightweight web service architecture of intelligent monitoring node is tested and verified. The result shows that the intelligent monitoring node and the IPv6 network can be fused seamlessly, and the number of intelligent monitoring nodes can be completed through a unified access interface. Finally, the paper summarizes the work done in this paper and forecasts the next step.
【學(xué)位授予單位】：上海海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TS201.6;TP393.09

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