METHOD OF ELECTROPHYSICAL CHARACTERISATION OF DISPERSED MATERIALS Russian patent published in 2010 - IPC G01N21/00 G01N33/02 A23L3/26 

FIELD: food industry.

SUBSTANCE: dispersed material is prepared by refining and moistening to reach equilibrium humidity. A sample of a piled up layer is formed by pouring the dispersed material into a tank. The ambient temperature and the product temperature are measured in the top and bottom surfaces of the piled up layer. The temperature field inside the piled-up layer sample is measured before the infrared (IR) heating and exposure to microwave frequency electromagnetic energy. The environmental temperature around the sample is kept at a constant level. The top surface of the piled-up layer sample is infrared heated. The radiant flux density of the radiant energy is measured on the heated surface. The top surface of the piled-up layer sample is irradiated with the microwave frequency electromagnetic energy so that the sample is installed in the free space between the transmitting antenna of the generator and the receiving antenna of the microwave frequency electromagnetic energy sensor so that there forms an electromagnetic wave on the sample surface with a flat phase front and the sample itself (its top and bottom surfaces) is positioned at an angle of 90° to the geometric axis of the antenna system. The transmitting antenna of the microwave frequency electromagnetic energy is balanced as well as the receiving antenna of the microwave frequency electromagnetic energy sensor and the sample. The temperature field inside the piled-up layer sample is measured within the infrared (IR) heating and exposure to microwave frequency electromagnetic energy. The microwave frequency electromagnetic energy sensor is used to measure tangent of the phase shift angle and module of dielectric layer transmission coefficient.

EFFECT: method enables to increase the target product yield, reduce specific power inputs and increase accuracy of measurement of electrophysical characteristics while performing manufacturing processes.

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