基于噪声估计的表层土壤质地快速检测  

Rapid Detection of Surface Soil Texture Based on Noise Estimation

作　　者：陈晓东[1] 姚喜军 云浩 徐艳红 南延民 CHEN Xiaodong;YAO Xijun;YUN Hao;XU Yanhong;NAN Yanmin(College of Textile and Light Industry,Inner Mongolia University of Technology,Hohhot 010051,China;1nner Mongolia Land Surveying and Planning Institute,Hohhot 010020,China)

机构地区：[1]内蒙古工业大学轻工与纺织学院,呼和浩特010051 [2]内蒙古自治区土地调查规划院,呼和浩特010020

出　　处：《中国资源综合利用》2022年第2期38-40,共3页China Resources Comprehensive Utilization

基　　金：内蒙古自治区科技计划项目(2019CG071)。

摘　　要：土壤质地是重要的土壤物理性质之一,快速准确并且无损地检测土壤质地,对于土地勘探和农业生产有着至关重要的意义。为了实现土壤质地的快速检测,本文选择内蒙古达拉特旗与土默特左旗作为研究区域,实地采集野外砂土、砂壤土的数据,并分析不同质地土壤的雷达图像,发现土壤图像的高斯白噪声与土壤含砂率具有直接相关性。本文采用主成分分析法对土壤的探地雷达图像进行分析,得到土壤图像的最小特征值与方差的比值K,然后基于回归分析方法拟合出比值K与图像块数量K的幂函数关系,最后利用实验的方法获取土壤含砂率与土壤图像真实噪声均方差估计值的大量数据。当真实噪声均方差的值为0~3000时,使用最小二次曲线拟合出真实噪声均方差与含砂量的函数关系,从而得出判断土壤质地的方法,快速、准确、无损地检测土壤质地。Soil texture is one of the important soil physical properties,fast,accurate and non-destructive detection of soil texture is of great significance for land exploration and agricultural production.In order to realize the rapid detection of soil texture,this paper selects Dalat Banner and Tumetzuo Banner in Inner Mongolia as the research areas,and collects field data of sandy soil and sandy loam soil,and analyzes the radar images of soils with different textures,and finds that the Gaussian white noise of the soil images has a direct correlation with the soil sand content.In this paper,the principal component analysis method is used to analyze the ground penetrating radar image of soil,and the ratio K of the minimum eigenvalue to the variance of the soil image is obtained,then,based on the regression analysis method,the power function relationship between the ratio K and the number of image blocks N is fitted,finally,the experimental method is used to obtain a large amount of data of the soil sand content and the real noise mean square error of the soil image.When the value of the mean square error of the real noise is 0~3000,the least quadratic curve is used to fit the functional relationship between the mean square error of the real noise and the sand content,so as to obtain a method for judging soil texture,and detect soil texture quickly,accurately and non-destructively.

关 键 词：土壤质地 快速检测 主成分分析 

分 类 号：X833[环境科学与工程—环境工程]