Abstract Application of multi-frequency radiolocation allows to expand essentially received signals spectrum that increases amount of a target (object) classification identifiers including thermal portraits for radiometric measurements. In this paper it is represented a prototype of measuring radiometric unit allowing to carry out simultaneously contactless radiometric research of liquids in two wavelength ranges: 8-mm and 3-mm. It is developed the method of definition of parameters of capacity (container) where liquids are placed. It is estimated an influence of caustics appearing in case of waves reflections from internal wall of container and also on quality factor, attenuation coefficient and relative factor of container which are distantly measured. In two frequency ranges there are carried out researches of two water solutions and oil processing products (gasoline, dissolvents, diesel fuel). It is shown the liquids with close thermal portraits in identical frequency band due to close physical-chemical parameters, can have different thermal portraits obtained in different frequency bands reflecting dispersion properties of the liquids and they can be used for liquids identification visually or in case of received data processing.

中文翻译：

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使用毫米波远程识别介质容器中的液体。4. 多频扫描

摘要 多频无线电定位的应用允许扩展本质上接收的信号频谱，从而增加目标（物体）分类标识符的数量，包括用于辐射测量的热像。在本文中，它代表了测量辐射测量单元的原型，允许同时对两个波长范围内的液体进行非接触式辐射测量研究：8 毫米和 3 毫米。它开发了定义放置液体的容量（容器）参数的方法。估计在容器内壁反射波的情况下出现焦散的影响，以及远距离测量的容器的品质因子、衰减系数和相对因子。在两个频率范围内进行了两种水溶液和石油加工产品（汽油、溶剂、柴油燃料）的研究。显示液体由于物理化学参数接近，在同一频段具有相近的热像，可以在不同频段获得不同的热像，反映液体的分散特性，可用于液体的目视识别或液体识别。 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?接收到的数据处理。