| 可见/近红外土壤湿度的光谱偏振特性实验研究 |
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| 引用本文： | 王新强,孙晓兵,张丽娟,汪杰君,谢秋蓉,叶松.可见/近红外土壤湿度的光谱偏振特性实验研究[J].红外与激光工程,2015,44(11):3288-3292. |
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| 作者姓名： | 王新强 孙晓兵 张丽娟 汪杰君 谢秋蓉 叶松 |
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| 作者单位： | 1.桂林电子科技大学 电子工程与自动化学院,广西 桂林 541004; |
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| 基金项目： | 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 |
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| 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。
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| 关 键 词： | 土壤湿度 偏振 可见/近红外光谱 实验研究 |
| 收稿时间： | 2015-03-05 |
Experimental study on visible and near-infrared spectrum polarization characteristic of soil moisture |
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| Affiliation: | 1.Department of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China;2.Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China |
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| Abstract: | 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. |
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