含水量
葡萄园
水分
工作(物理)
电介质
环境科学
计算机科学
光学(聚焦)
遥感
农业工程
电子工程
工程类
气象学
电气工程
物理
地理
机械工程
光学
考古
岩土工程
作者
Youssef N Altherwy,Julie A. McCann
出处
期刊:IEEE Transactions on Instrumentation and Measurement
[Institute of Electrical and Electronics Engineers]
日期:2021-01-01
卷期号:70: 1-12
被引量:1
标识
DOI:10.1109/tim.2020.3027928
摘要
Convenient, non-obtrusive, low-cost, and accurate sensing of fruit moisture content is crucial for the scientific studies of pomology and viticulture and their associated agriculture. It can provide early indicators of yield estimation and crop health as well as providing data for food production and precision farming systems. With a focus on grapes, we introduce SING, a scheme that senses grape moisture content by utilizing RF signals but without physical contact with the fruit. In this article, we extend the investigation of the theoretical relationship between the dielectric properties and the moisture content of agricultural products to establish a sensing model in the 5-GHz band. To make the work practical, we are first to measure the dielectric properties of grape bunches (not individually as that would be destructive), presenting a unique measurement challenge as internal grapes are hidden. In doing so, we demonstrate that our technique precisely estimates moisture content to a high degree of accuracy (90%). Current RF sensing models to estimate moisture are destructive; they require samples to be constrained in containers. Our work is first to dispense with such impracticalities and, without contact with the object, accurately measures nonuniform grape clusters in open space. We demonstrate that SING is superior to existing work in its ability to accurately measure the dielectric properties of nonuniform fruit objects and test this through both lab-based experimentation and preliminary outdoor vineyard tests.
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