Litvischenko Vitali L, Nikiforov Igor Ya, Ershov Igor V
Department of Physics, Don State Technical University, Rostov-on-Don, Russia.
J Sci Food Agric. 2017 Nov;97(14):4880-4882. doi: 10.1002/jsfa.8359. Epub 2017 May 5.
Modern agriculture demands new methods and equipment that allow operators to conduct the instant control of moisture content over a wide area of agricultural fields with the purpose of providing farmers with the optimal moment of harvesting mature seeds and crops. Here the authors propose a new method and experimentally investigate the possibility to accomplish remote sensing of the moisture content of sunflower seeds using microwave radiation in the millimeter range.
An experimental device for measuring the coefficient of reflection of electromagnetic waves from sunflower inflorescences in the frequency range 25.9-37.5 GHz was created. The obtained results showed that the moisture content of mature sunflower seeds affected the reflected signal. A difference in the reflected signal from the front and back sides of unripe sunflower inflorescences was also found.
The results show that microwave radiation can be used to determine the degree of readiness of seeds for harvesting. The proposed new method opens up the possibility of remote instant diagnosis of sunflower seed ripeness in the field. © 2017 Society of Chemical Industry.
现代农业需要新的方法和设备，以便操作人员能够在大面积农田上即时控制水分含量，目的是为农民提供收获成熟种子和作物的最佳时机。在此，作者提出了一种新方法，并通过实验研究了利用毫米波范围内的微波辐射实现向日葵种子水分含量遥感的可能性。
创建了一个用于测量频率范围为25.9 - 37.5 GHz的向日葵花序电磁波反射系数的实验装置。所得结果表明，成熟向日葵种子的水分含量会影响反射信号。还发现未成熟向日葵花序前后侧反射信号存在差异。
结果表明，微波辐射可用于确定种子收获的成熟度。所提出的新方法为田间向日葵种子成熟度的远程即时诊断开辟了可能性。© 2017化学工业协会。
