基于介電原理的淺層土壤水分測(cè)量方法研究
[Abstract]:Soil moisture is an important parameter in agriculture, hydrology and meteorology. In view of the deficiency that soil moisture sensor can only measure soil moisture below specific depth at present, this paper attempts to transfer the deeply buried soil moisture sensor to shallow soil (5cm thick soil) to measure soil moisture from the dielectric properties of soil. By improving the probe structure, the shallow soil moisture measurement was realized effectively. The contents and main results of this study are as follows: in order to transfer the deep buried dielectric principle soil moisture sensor to the shallow 5cm soil moisture measurement, this study improved the conical probe and proposed a parallel probe structure. In order to verify the rationality of the proposed probe structure, the electromagnetic simulation software HFSS was used to simulate the probe and the probe soil system. The theoretical results of HFSS model show that the parallel probe structure can be coupled by electromagnetic coupling through water-bearing soil and can be used for surface measurement of shallow 5cm soil moisture. At the same time, the theoretical results of HFSS solution also show that the sensitivity of the sensor decreases with the increase of probe length L and probe spacing d. In order to verify the above analysis, organic solution experiments and drying experiments were designed. Prior to this, the influence of probe parameters on the sensitivity of the sensor was verified by the control variable method. The experimental results of organic solution show that the output of the FD shallow soil moisture sensor can represent the water content in the soil to a certain extent. Through the actual measurement of 5cm soil layer, the possibility of applying dielectric theory to the measurement of soil moisture surface is proved. This result is complementary to the measurement of deep soil moisture.
【學(xué)位授予單位】:北京林業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:S152.7;TP274
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 謝淑云;鮑征宇;秦兵;李兵;楊振鴻;;成都盆地淺層土壤中元素來(lái)源研究[J];土壤通報(bào);2007年05期
2 范蕊;張改景;龍惟定;;淺層土壤蓄熱能資源量計(jì)算分析[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2012年04期
3 孫浩;李明思;丁浩;;淺層土壤中子儀標(biāo)定關(guān)系的試驗(yàn)研究[J];水資源與水工程學(xué)報(bào);2009年02期
4 馬秋云;周春輝;杜光明;;早春淺層土壤覆膜與露地的地溫分析[J];農(nóng)村科技;2006年01期
5 方慧;楊其長(zhǎng);梁浩;王爍;;日光溫室淺層土壤水媒蓄放熱增溫效果[J];農(nóng)業(yè)工程學(xué)報(bào);2011年05期
6 張奮東,宋郁東;提高中子淺層測(cè)濕精度率定方法的比較研究[J];干旱區(qū)研究;2005年04期
7 張?jiān)?張勝;劉長(zhǎng)禮;侯宏冰;;田間施肥引起淺層土壤中氮的蓄積試驗(yàn)分析[J];土壤;2006年01期
8 王俊峰;吳青柏;;氣溫升高對(duì)青藏高原沼澤草甸淺層土壤水熱變化的影響[J];蘭州大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年01期
9 任利民,陳代庚,陳德友,唐文春,秦兵,周雪梅,馬振東,胡以鏗;成都盆地淺層土壤中Cd來(lái)源初探[J];地質(zhì)通報(bào);2005年08期
10 楊靜敬;蔡煥杰;王松鶴;謝恒星;;楊凌區(qū)淺層土壤水分與深層土壤水分的關(guān)系研究[J];干旱地區(qū)農(nóng)業(yè)研究;2010年03期
相關(guān)會(huì)議論文 前1條
1 侯瓊;鄧曉東;;中子儀測(cè)定淺層土壤水分偏差問(wèn)題的探討[A];面向21世紀(jì)的科技進(jìn)步與社會(huì)經(jīng)濟(jì)發(fā)展(上冊(cè))[C];1999年
相關(guān)重要報(bào)紙文章 前1條
1 記者 王忠德邋實(shí)習(xí)生 何金德;我市春播農(nóng)作物180萬(wàn)畝[N];蘭州日?qǐng)?bào);2008年
相關(guān)碩士學(xué)位論文 前4條
1 方慧;日光溫室淺層土壤水媒蓄放熱系統(tǒng)及其與熱泵結(jié)合的試驗(yàn)研究[D];中國(guó)農(nóng)業(yè)科學(xué)院;2011年
2 王巧利;基于介電原理的淺層土壤水分測(cè)量方法研究[D];北京林業(yè)大學(xué);2015年
3 霍振華;條件非線性最優(yōu)參數(shù)擾動(dòng)方法在CoLM中的應(yīng)用[D];河南大學(xué);2013年
4 劉鐵軍;陰山北部淺層土壤凍融特性試驗(yàn)研究[D];內(nèi)蒙古農(nóng)業(yè)大學(xué);2006年
,本文編號(hào):2405026
本文鏈接:http://www.sikaile.net/kejilunwen/nykj/2405026.html