摘要
为适应现代温室大棚灌溉系统科学化与精量化的需求,提出一种基于微波谐振技术测量温室作物含水量的方法。论述利用微波谐振法测量作物含水量的原理,将温室蔬菜叶片作为检测对象,提出并论证作物叶片水分含量不受叶片密度影响的算法。通过作物叶片介电常数作为桥梁,建立起作物含水量与谐振腔谐振频率f0与品质因数Q的函数关系,得出关系曲线,为建立温室大棚含水量检测系统打下基础,也为精量灌溉系统水分指标的获取提供一种新的技术手段。
In order to adapt to the need of scientific and exact quantization of the modern greenhouse irrigation systems, a method based on microwave resonance technology was proposed to measure the moisture content of greenhouse crops. In this paper, the princi- ples of using microwave resonance technology to measure the moisture content of crops were introduced. Greenhouse vegetable leaves were used as test objects, and the leaf water content measurement algorithm that is shielded from the effect of blade density was pro- posed and demonstrated. The function between crop moisture content and the cavity resonance frequency fO and quality factor Q was established by using dielectric constant of plant leaves and the curve was obtained. The study not only provides the foundation for the establishment of greenhouse water content detection system, but also provides a new technical means for acquiring water index of a so- phisticated irrigation system.
出处
《森林工程》
2013年第3期90-92,96,共4页
Forest Engineering
基金
黑龙江省教育厅科学技术研究项目(12513041)
关键词
微波谐振
介电常数
含水量检测
microwave resonator
dielectric constant
measurement of water content
