Remote sensing of the physical qualities of fruits
Remote sensing of the physical qualities of fruits
复制标题
水果物理品质遥感
DOI：
10.1109/radio.2016.7772047
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
King Mongkut’s
中科院分区：
文献类型：
--
作者：
M. Krairiksh;King Mongkut’s
非破坏性测定材料的介电性能在各种应用中是必不可少的，以监测对象的性质。除了像近红外（NIR）、X射线、超声波等许多技术之外，基于微波的技术由于其低成本、高精度和小尺寸而受到关注。在这次演讲中，我们的目标是描述和提出一种新的方法来确定在原地成熟的水果，以及如何将它们应用在真实的时间应用。该方法已被应用于测定榴莲、山竹等水果的质量。在这种方法中，我们建议使用的RCS测量中使用的自由空间测量技术，并使用自然谐振频率的概念来估计的介电特性随时间的变化，从而涉及到水果的物理特性。将描述这些电特性作为频率的函数的变化，并且还将讨论如何可以应用奇异性扩展方法来估计各种水果的自然谐振频率的变化，因为它随着时间的推移而成熟，从而改变糖含量。本讲座将提供各种测量技术的概述，并尝试将各种水果的电特性与物理特性联系起来。
Nondestructive determination of dielectric properties of materials is essential in various applications to monitor the nature of an object. Apart from many techniques like near infrared (NIR), X-ray, ultrasonic, and so on, a microwave based technique is of interest due to its low cost, high accuracy, and small size. In this talk the objective is to describe and present a novel way to determine in situ the ripening of fruits and how they can be applied in real time applications. This methodology has been applied to determine the quality of fruits like Durian, Mangosteen and the like. In this methodology we propose to use a free space measurement technique used in RCS measurements and use the natural resonant frequency concepts to estimate the variation of the dielectric properties with time, and thereby relate to the physical characteristics of the fruit. The variation of these electrical properties as a function of frequency will be described and how the singularity expansion method can be applied to estimate the variation of the natural resonant frequency of the various fruits as it ripens changing the sugar content with time will also be discussed. This talk will provide an overview of the various measurement techniques and try to relate the electrical properties to the physical properties of the various fruits.