近红外传感器测量不同种类土壤含水率的适应性研究

被引：9

作者：

殷哲

雷廷武

陈展鹏

晏清洪

董月群

机构：

[1] 中国农业大学水利与土木工程学院

来源：

农业机械学报 | 2014年 / 45卷 / 03期

基金：

国家自然科学基金重点项目;

关键词：

土壤含水率; 近红外; 传感器; 模型适应性;

D O I：

暂无

中图分类号：

S152.7 [土壤水分]; TP212.9 [传感器的应用];

学科分类号：

0903 ; 090301 ; 080202 ;

摘要：

采用我国不同土壤类型地区的5种土壤样品,利用自行设计的近红外传感器测量不同土壤含水率对应的反射光强。选取中心波长1 940 nm的近红外光为测量光,1 800 nm为参考光,将两波长的反射光强值换算为相对吸收深度。实测结果表明,随着土壤含水率的增加,相对吸收深度增加,两者间呈线性相关关系。选取独立样品对线性标定模型进行验证,除红土外,其他4种样品的均方根误差均小于6%。通过标定,所设计的传感器能够较好地测定不同土壤的含水率。

引用

页码：148 / 151+190 +190

页数：5

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