本文選題：凍土 + 信息采集��； 參考：《北京林業(yè)大學》2014年碩士論文

【摘要】：本文以我國北方地區(qū)的季節(jié)性凍融土壤為研究對象,開發(fā)具有獨立知識產(chǎn)權的土壤凍融信息檢測系統(tǒng),研究凍融數(shù)據(jù)處理和分析方法,對土壤凍融過程中的水分和溫度變化規(guī)律進行了初步研究。 具體的研究內(nèi)容如下所示： (1)從土壤水分測量原理出發(fā),結合土壤溫度以及深度測量,研發(fā)出一種土壤凍融信息測量傳感器。傳感器集成高速處理器,采用CAN總線進行通信的分布式控制模式,使整個系統(tǒng)更智能。 (2)優(yōu)化傳感器外形設計,采用管式外形,模具化處理,簡化了安裝、操作過程,降低了對原狀土壤的破壞,更適用于野外自然環(huán)境下的常期在線監(jiān)測。 (3)針對土壤凍融信息采集的特殊性,研發(fā)了兩套數(shù)據(jù)采集及傳輸系統(tǒng),分別在實驗室和野外進行了長期試驗觀測,充分驗證了系統(tǒng)的穩(wěn)定性和實用性,同時取得了大量的實驗室測量數(shù)據(jù),以及一個完整凍融周期在線監(jiān)測數(shù)據(jù),對土壤水熱運移規(guī)律的分析奠定了基礎,也為相關行業(yè)提供了測量工具。 (4)通過在北京市昌平區(qū)小湯山實驗基地、西安津匯渠試驗區(qū)以及新疆石河子炮臺鎮(zhèn)實驗基地等地區(qū),一個完整凍融階段內(nèi)信息采集,通過實地測量結果分析得出,土壤的溫度變化比較緩慢,具有一定的保溫性能。在整個凍融過程內(nèi),表面土壤相變比較明顯而且較快,深層土壤溫度變化比較慢,相變過程不明顯。根據(jù)土壤水熱方程以及相關的初始、邊界條件,用實驗數(shù)據(jù)對土壤含冰量進行了計算與分析。 綜上所述,本研究完成了土壤凍融信息獲取方法、測量傳感器的研發(fā),以及北京地區(qū)土壤凍融模型的初步研究,為促進農(nóng)林業(yè)的可持續(xù)發(fā)展提供了科學技術保障。
[Abstract]:In this paper, the seasonal freeze-thaw soil in the north of China is taken as the research object, and a soil freeze-thaw information detection system with independent intellectual property rights is developed, and the method of data processing and analysis of freeze-thaw data is studied. The changes of soil moisture and temperature during soil freezing and thawing were studied. The specific research contents are as follows: (1) based on the principle of soil moisture measurement and soil temperature and depth measurement, a soil freeze-thaw information measurement sensor is developed. Sensor integrated high speed processor, can bus communication distributed control mode, make the whole system more intelligent. (2) optimize the sensor shape design, adopt tube shape, die processing, simplify the installation, operation process, It reduces the damage to the undisturbed soil, and is more suitable for the on-line monitoring in the field. (3) aiming at the particularity of soil freeze-thaw information collection, two sets of data acquisition and transmission systems are developed. Long-term experimental observations were carried out in laboratory and field respectively, which fully verified the stability and practicability of the system. At the same time, a large number of laboratory data were obtained, as well as on-line monitoring data of a complete freeze-thaw cycle. The analysis of soil water and heat transport laws has laid a foundation for the relevant industries to provide a measuring tool. (4) through the experimental base of Xiaotangshan, Changping District, Beijing, In the experimental area of Xi'an Jinhui Canal and the experimental base of Guotai Town in Shihezi, Xinjiang, the information was collected in a complete freezing and thawing stage. Through the analysis of field measurement results, it was found that the temperature of the soil changed slowly and had certain thermal insulation performance. During the whole process of freezing and thawing, the phase transition of surface soil is obvious and fast, the temperature of deep soil changes slowly, and the process of phase transition is not obvious. According to the soil hydrothermal equation and the initial and boundary conditions, the ice content of soil was calculated and analyzed with the experimental data. To sum up, this study has completed the research and development of soil freezing and thawing information, the development of measurement sensors and the preliminary study of soil freezing and thawing model in Beijing area, which provides scientific and technological guarantee for promoting the sustainable development of agriculture and forestry.
【學位授予單位】：北京林業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP274.2;TP212

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本文編號：2056425