Position: Home > Articles > THE STUDY OF LOW FREQUENCY ELECTROMAGNETIC WAVE RAPIDLY MEASURING SOIL MOISTURE CONTENT
Transactions of the Chinese Society for Agricultural Machinery
1998,29
(1)
用低频电磁波速测土壤水分的研究
作 者：
隋吉东;刘振忠;蔡德利;张承路
单 位：
黑龙江八一农垦大学物理教研室;黑龙江八一农垦大学植物科学院
关键词：
低频,电磁波,土壤含水量,电导率
摘 要：
用高频电磁波速测土壤水分的仪器在国外早已面世。多年来，我们对用低频电磁波速测土壤水分进行了研究。研究表明，用低频电磁波速测土壤水分不但测量准确度高，而且仪器造价低。不过用此法需测量的参数较多，且有些参数很难通过被测土壤直接测定出来，对此，我们采用高斯消元法将难以测定的几个参数消去了，用通过土壤的４个瞬时电流确定难以测定的土壤介质的电导率。对土壤含水量与各参数之间的关系，运用多元回归分析的方法求得。
译 名：
THE STUDY OF LOW FREQUENCY ELECTROMAGNETIC WAVE RAPIDLY MEASURING SOIL MOISTURE CONTENT
作 者：
Sui Jidong\ Liu Zhenzhong\ Cai Deli\ Zhang Chenglu (Heilongjiang August First Reclamation University)
关键词：
Low frequency, Electromagnetic wave, Soil moisture content, Conductivity
摘 要：
The overseas instrument which rapidly measures soil moisture content through high frequency electromagnetic wave has been made. We have studied rapidly measuring soil moisture content with low frequency electromagnetic wave. The study shows that the method has not only high accuracy but also low cost. But this method has to measure more parameters and some of which are measured in a tight corner, therefore we take the Gaussian elimination to eliminate them. The conductivity of soil medium can be rapidly measured through four instantaneous electric currents which pass through soil. The relation between soil moisture content and parameters is obtained from plural regression analysis.
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