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Measurement of grain and grain products moisture by ultrahigh-frequency method: the effect of grain density heterogeneity on the mass ratio of moisture
https://doi.org/10.32446/0368-1025it.2022-9-71-76
Abstract
Various methods of measuring the moisture content of bulk materials (grain and grain products) used at grain processing enterprises are described, including a method using such an indicator of grain quality as the mass humidity ratio. It is shown that it is preferable to use the method of ultrahigh frequency humidity measurement. A functional diagram of an installation for measuring humidity, grain moisture and grain products in the technological process by the ultrahigh frequency method is presented. The info hence of grain heterogeneity in density on the informative parameter of humidity with an ultrahigh-frequency method of measuring humidity is analyzed, considering the complexity of mathematical modeling of humidity control in the technological process of grain materials production. The results of experimental measurements of humidity in laboratory and production conditions of a grain processing enterprise are presented, an analysis of measurement errors is presented. It is shown that the most signify cant contribution in amplitude measurements is made by the unevenness of the moisture distribution in the bond forms and the inhomogeneity of the sample in density, and in phase measurements – a change in density, and the error in measuring humidity decreases with increasing volume density. Based on a comparative analysis of grain moisture measurement errors, it was found that the use of the multiparametric method reduces the specified error compared to the error of the one-parameter method, which is explained by minimizing the info hence of various interfering factors. The expediency of using a multipara metric method of measuring the mass ratio of grain moisture at grain processing plants and enterprises is substantiated.
About the Authors
G. I. Ikramov
Republican Design Institute “UzEngineering”
Uzbekistan
Uzbekistan
Gani I. Ikramov
Tashkent
P. I. Kalandarov
National Research University “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers”
Uzbekistan
Uzbekistan
Palvan I. Kalandarov
Tashkent
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Review
For citations:
Ikramov G.I., Kalandarov P.I. Measurement of grain and grain products moisture by ultrahigh-frequency method: the effect of grain density heterogeneity on the mass ratio of moisture. Izmeritel`naya Tekhnika. 2022;(9):71-76. (In Russ.) https://doi.org/10.32446/0368-1025it.2022-9-71-76
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