可见/近红外土壤湿度的光谱偏振特性实验研究  

Experimental study on visible and near-infrared spectrum polarization characteristic of soil moisture

作　　者：王新强[1] 孙晓兵[2] 张丽娟[1] 汪杰君[1] 谢秋蓉[1] 叶松[1] 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004 [2]中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《红外与激光工程》2015年第11期3288-3292,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(40971196);广西自然科学基金(2012GXNSFBA053170);广西教育厅重点项目(ZD2014053);广西自动检测技术与仪器重点实验室基金(YQ14108;YQ14101);桂林电子科技大学创新团队项目

摘　　要：为探讨在更多波段上开展基于光偏振特性土壤湿度检测的可行性,采用自行搭建的光学系统,在可见/近红外波段上开展土壤湿度与反射光偏振特性的实验研究。研究结果表明：在600~800 nm波段,土壤湿度与反射光偏振度具有相关性,其中当14%≤土壤湿度≤30%时,反射光偏振度与土壤湿度具有良好的线性关系。对实测数据进行回归分析,结果显示线性模型平均标准差小于3%,优于参考文献[5]中近红外光谱特征方法 10%的误差结果,说明在该波段范围,采用测量光偏振态进行土壤湿度检测的方法具有可行性,为大范围土壤含水量的偏振遥感探测提供科学依据。The self-constructed optical system was employed to study soil moisture and reflected light polarization characteristics in visible and near-infrared, to discuss the feasibility of the soil moisture detection based on light polarization property in more wave bands. The study results show： in the band of 600-800 nm, soil moisture and the degree of reflected light polarization have correlation, especially when the soil moisture is more than or equal to 14% and less than or equal to 30%, the degree of reflected light polarization and soil moisture have proper linear relation. According to analysis of regression to measured data, linear model average standard deviation is less than 3%, having an advantage over the method of near infrared spectrum characteristic of 10% obtained in Ref. [5], accounting for the feasibility of the soil moisture detection on the basis of measuring light polarization in this band （600-800 nm）, providing scientific basis for polarization remote sensing detection in wide-range soil water content.

关 键 词：土壤湿度 偏振 可见/近红外光谱 实验研究 

分 类 号：O436.3[机械工程—光学工程]