本文關鍵詞：基于模糊控制理論及ZigBee無線網(wǎng)絡的智能水土侵蝕采樣裝置的研究　出處：《吉林大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 水土侵蝕 ZigBee CC2530 模糊邏輯控制 自動采樣

【摘要】：水土侵蝕是指土壤或成土母質(zhì)在外力(水、風)作用下被破壞剝蝕、搬運和沉積的過程。水土侵蝕是土壤退化的一個最普遍的原因,全球約有80%的土地受到侵蝕,遭受水土侵蝕的土地達到10.94億公頃,其中嚴重侵蝕達7.51億公頃。大雨或暴雨對土體的擊濺力強,徑流量大,沖刷強烈往往造成嚴重的水土流失。近年來我國水土流失情況越來越嚴重,不斷地惡化的土地情況越來越得到社會各界的高度重視,其中水土侵蝕是我國分布最廣、危害最嚴重的水土流失類型,其總面積占國土面積的17%。降雨或冰雪凍融導致的地表徑流是水土侵蝕的主要途徑。目前,我國有很多科研部門和政府單位都在研究各個地區(qū)的水土侵蝕情況,研究水土侵蝕對我國的生態(tài)保護、農(nóng)業(yè)生產(chǎn)、土地的合理利用都有極其重要的意義,但是,由于國內(nèi)此方面的發(fā)展相對較晚,導致我國在水土測量采集方面的裝置多數(shù)都從國外引進,國外的設備幾乎處于壟斷的地位,使得國內(nèi)每年水土流失監(jiān)測部門花費大量資金購買國外設備,因此水土流失采樣設備的國產(chǎn)化意義重大。同時,在國產(chǎn)化的同時結合實際科研和工作要求對設備進一步的改造,生產(chǎn)出性能更佳價格更低的高質(zhì)量的國產(chǎn)化產(chǎn)品,擁有自主的知識產(chǎn)權。國際上對于水土侵蝕的監(jiān)測通常是通過搭建徑流小區(qū),采集雨后徑流小區(qū)內(nèi)產(chǎn)生的徑流來分析水土侵蝕的情況。傳統(tǒng)的采樣裝置使用有線方式進行數(shù)據(jù)傳輸,在惡劣的降雨環(huán)境中給操作者帶來了很多的不便性,為了有線傳輸帶來的不便性,本文基于無線局域網(wǎng)(ZigBee)技術,設計了一種智能的徑流場水土侵蝕采樣系統(tǒng),用于自動采集雨后地表徑流樣本,并記錄徑流的流量強度和降雨強度等參數(shù)。裝置采用TI公司的CC2530微處理器為核心控制器,負責無線數(shù)據(jù)收發(fā)及采樣裝置控制。該系統(tǒng)由無線手操器和多臺徑流采樣裝置組成。手操器和徑流采樣裝置組成星型ZigBee網(wǎng)絡進行數(shù)據(jù)傳輸,手操器作為中心節(jié)點負責整個網(wǎng)絡的管理及對各個采樣裝置的控制。徑流采樣裝置作為網(wǎng)絡分節(jié)點根據(jù)手操器設定的采樣規(guī)則自動對徑流進行分離采樣。對于徑流采樣規(guī)則的設定實現(xiàn)了人工設定和設備智能設定兩種方式,智能設定方式采用了基于模糊數(shù)學的模糊邏輯控制算法,根據(jù)實時的降雨強度和徑流強度信息建立合理的專家知識庫,同時進行相應的模糊推理,得到更為合理的采樣規(guī)則設定。經(jīng)過現(xiàn)場實驗,結合實驗數(shù)據(jù),驗證了該系統(tǒng)具有使用方便、穩(wěn)定性好等優(yōu)點,對水土侵蝕設備的研制具有一定的參考價值。
[Abstract]:Soil and water erosion refers to the process of erosion, removal and deposition of soil or soil matrix under the action of external force (water and wind). Soil erosion is one of the most common causes of soil degradation. About 80% of the world's land is eroded, and the land that has suffered from water and soil erosion reaches 1 billion 94 million hectares, of which 751 million hectares are seriously eroded. Heavy rain or torrential rain has a strong splash force and large runoff, and the strong erosion is often caused by strong scour. In recent years, soil and water loss is becoming more and more serious in China. The deteriorating land is attracting more and more attention from all walks of life. Soil erosion is the most widely distributed and most serious soil and water loss type in China. Its total area accounts for 17% of the total land area. Surface runoff caused by rainfall or freezing and thawing is the main way of soil erosion. At present, there are many research departments and government units in the study of the various regions of the soil erosion, soil erosion research on China's agricultural production, ecological protection and reasonable utilization of land are extremely important, however, due to the development of the domestic equipment in our country is relatively late, resulting in soil sampling measurement most are imported from abroad, foreign equipment is almost in a monopoly position, so spend a lot of money to buy foreign equipment monitoring department of soil and water loss in China every year, so the loss of water and soil sampling equipment localization significance. At the same time, combined with the actual research and work requirements, we will further transform the equipment and produce better quality products with independent intellectual property rights. The monitoring of soil erosion in the world is usually by setting up a runoff plot, collecting runoff generated in the runoff plot after rain to analyze the situation of soil and water erosion. The traditional sampling device for data transmission using the wire, in the harsh environment of rain brought inconvenience to the operator of a lot of inconvenience to cable transmission, based on wireless local area network (ZigBee) technology, designed a kind of intelligent runoff and erosion sampling system for collecting rain runoff samples automatically. And record the runoff flow intensity and rainfall intensity. The device uses the CC2530 microprocessor of TI company as the core controller, which is responsible for the wireless data receiving and sampling device control. The system is composed of a wireless hand operator and a number of runoff sampling devices. The hand-operated device and the runoff sampling device constitute the star ZigBee network for data transmission. The hand-held device as the central node is responsible for the management of the entire network and the control of the sampling devices. The runoff sampling device automatically separate and sample the runoff as the network node according to the sampling rules set by the hand manipulator. The runoff sampling rules set to realize the artificial setting and intelligent equipment set in two ways, intelligent setting mode using fuzzy logic control algorithm based on fuzzy mathematics, according to the real-time rainfall intensity and runoff intensity information to establish the expert knowledge base is reasonable, at the same time. The corresponding fuzzy reasoning, get a more reasonable sampling rule set. Through field experiments and experimental data, it is verified that the system has the advantages of convenient operation and good stability. It has a certain reference value for the development of soil erosion equipment.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S157.1;TN92

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