本文選題：無線傳感器網(wǎng)絡(luò)　切入點(diǎn)：遠(yuǎn)程傳輸　出處：《南京農(nóng)業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：農(nóng)業(yè)是支撐國(guó)民經(jīng)濟(jì)建設(shè)與發(fā)展的基礎(chǔ)產(chǎn)業(yè),是社會(huì)發(fā)展的首要條件。研究建立我國(guó)精確農(nóng)業(yè)技術(shù)體系,大力發(fā)展信息化與自動(dòng)化農(nóng)業(yè)技術(shù),實(shí)現(xiàn)農(nóng)業(yè)生產(chǎn)管理過程中對(duì)作物、土壤、環(huán)境的實(shí)時(shí)監(jiān)測(cè)和控制,對(duì)于提高我國(guó)農(nóng)業(yè)現(xiàn)代化水平,實(shí)現(xiàn)依靠科技進(jìn)步解決糧食安全問題具有重大的意義。本課題依托南京農(nóng)業(yè)大學(xué)國(guó)家信息農(nóng)業(yè)工程技術(shù)中心承擔(dān)的國(guó)家高技術(shù)研究發(fā)展計(jì)劃“農(nóng)產(chǎn)品安全生產(chǎn)智慧管理技術(shù)的開發(fā)與應(yīng)用”,目標(biāo)在于研究農(nóng)田信息快速獲取技術(shù),突破作物生長(zhǎng)信息實(shí)時(shí)準(zhǔn)確獲取裝置的局限,開發(fā)了集信息感知、信息處理和信息傳輸為一體的作物-大氣-土壤信息無線采集節(jié)點(diǎn),能夠?qū)崟r(shí)獲取作物生長(zhǎng)信息(氮含量、氮積累量、葉面積指數(shù)、生物量)、農(nóng)田大氣信息(溫濕度、C02濃度)、農(nóng)田土壤信息(土壤水分、土壤溫度),同時(shí)研制了用于組網(wǎng)和管理遠(yuǎn)程接入的智能網(wǎng)關(guān)節(jié)點(diǎn),構(gòu)建自組網(wǎng)絡(luò)系統(tǒng),通過大規(guī)模部署于作物主要生產(chǎn)區(qū)域的不同苗情監(jiān)測(cè)點(diǎn),則可實(shí)現(xiàn)無人值守條件下對(duì)作物生長(zhǎng)信息、大氣信息、土壤信息進(jìn)行長(zhǎng)期、大范圍、實(shí)時(shí)自動(dòng)感知與監(jiān)測(cè),從而為作物生長(zhǎng)診斷和全程管理提供實(shí)時(shí)信息和決策依據(jù)。這不僅可以提升我國(guó)農(nóng)產(chǎn)品的安全生產(chǎn)與品質(zhì)控制,而且還具有十分重要的社會(huì)經(jīng)濟(jì)價(jià)值。在如皋、張家港、徐州等多個(gè)基地的現(xiàn)場(chǎng)實(shí)施表明,系統(tǒng)可以長(zhǎng)期穩(wěn)定工作,遠(yuǎn)程獲取農(nóng)田的相關(guān)數(shù)據(jù)�？紤]到農(nóng)田信息變化緩慢,數(shù)據(jù)在時(shí)間和空間上具有一定的相似性,本文從數(shù)據(jù)收發(fā)的角度出發(fā),利用匯聚節(jié)點(diǎn)進(jìn)行數(shù)據(jù)流預(yù)測(cè),判斷各采集節(jié)點(diǎn)是否發(fā)送數(shù)據(jù),控制發(fā)送數(shù)據(jù)量來實(shí)現(xiàn)傳感器網(wǎng)絡(luò)自適應(yīng)傳輸。測(cè)試表明無線傳感網(wǎng)采用本文的低功耗傳輸機(jī)制后,網(wǎng)關(guān)節(jié)點(diǎn)接收的數(shù)據(jù)量明顯減少,各傳感器節(jié)點(diǎn)電池電壓隨時(shí)間降低速率明顯降低,當(dāng)閾值ε和閾值η設(shè)定為0.5%時(shí),電池電壓從4V降至3.88V延長(zhǎng)了接近一倍的時(shí)間,能有效的降低傳感器節(jié)點(diǎn)的通信能耗,延長(zhǎng)網(wǎng)絡(luò)的生存周期。
[Abstract]:Agriculture is the basic industry supporting the construction and development of national economy and the primary condition of social development. This paper studies the establishment of precision agricultural technology system in China, vigorously develops information and automation agricultural technology, and realizes crop control in the process of agricultural production and management. The real-time monitoring and control of soil and environment will improve the level of agricultural modernization in China. It is of great significance to solve the problem of food security by relying on the progress of science and technology. This subject relies on the National High Technology Research and Development Program of National Information and Agricultural Engineering Technology Center of Nanjing Agricultural University, "safe production wisdom of agricultural products". The development and application of smart management technology ", the goal of which is to study the rapid access technology of farmland information." Breaking through the limitation of the real-time and accurate acquisition device of crop growth information, a wireless collection node of crop-atmosphere-soil information, which integrates information perception, information processing and information transmission, has been developed, which can obtain crop growth information (nitrogen content) in real time. Nitrogen accumulation, leaf area index, biomass, field atmospheric information (temperature and humidity, C02 concentration), farmland soil information (soil moisture, soil temperature), and intelligent gateway nodes for networking and remote access management have been developed. By constructing an ad hoc network system, through large-scale deployment in different seedling monitoring points in the main crop production areas, we can carry out long-term and large-scale monitoring of crop growth information, atmospheric information and soil information under unattended conditions. Real-time automatic sensing and monitoring can provide real-time information and decision basis for crop growth diagnosis and whole process management, which can not only improve the safety production and quality control of agricultural products in China. And it also has very important social and economic value. The field implementation in Rugao, Zhangjiagang, Xuzhou and other bases shows that the system can work steadily for a long time and obtain farmland data remotely. Considering the slow change of farmland information, The data is similar in time and space. In this paper, from the point of view of data receiving and sending, we use the convergent node to predict the data flow, and judge whether each collecting node sends the data or not. Control the amount of transmitted data to realize the adaptive transmission of sensor network. The test results show that the wireless sensor network adopts the low power transmission mechanism in this paper, and the data received by the gateway node is obviously reduced. When the threshold 蔚 and the threshold 畏 are set to 0.5, the battery voltage drops from 4 V to 3.88 V and the time is nearly doubled, which can effectively reduce the communication energy consumption of sensor nodes. Extend the lifetime of the network.
【學(xué)位授予單位】：南京農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP212.9;TN929.5;S126

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本文編號(hào)：1559941