Abstract
The article describes the principle of measuring the humidity of solid and bulk materials, as well as the analy- sis of the spectrum of electromagnetic vibrations used within the medium - and short-wave ranges (from 0.1 to 50 MHz) of high frequencies for measuring humidity. The actions of high-frequency moisture-measuring systems based on the presence of a dependence between the dielectric permittivity of the controlled material and its humidity are discussed. A distinctive feature of the study is that the controlled material is placed in a capacitive primary converter, while the measurement parameter is not the permittivity, but the capacitance of the converter. We describe the dielkometric method and recommend on their basis the design and synthesis of a dielkometric humidity control device, which we are currently conducting research in the food industry with the help of concentrates, flour, tea, grain, malt, in the agricultur- al industry – the humidity of raw cotton, cotton seeds, husk, meal, cake, grain and grain products, wheat, corn, barley, and many other products, semi-finished products and raw materials. The frequency dependences of the permittivity are studied, which are determined by the frequency dependences of the real and imaginary parts of the electronic and ionic polarization, as well as metrological and information optimization of the measuring device, the change in the output signal and their equation are described.
Keywords
humidity, moisture content, measurement, method, frequency, device, converter, capacitance, permittivity.
1. Krymskij, K.I., Bol'shunova, O.M. (2012) Zapiski gornogo institute, 196: 248-251.
2. Kalandarov, P.I. (2021) Metrologiya, №2: 44-62.
3. Masharipov, SH.M. (2016) Pribory, 4: 31-37.
4. Gajskij, P.V. (2020) Sistemy kontrolya okruzhayushchej sredy, 2(40): 72-81.
5. Kalandarov, P.I., Iskandarov, B.P. (2012) Measurement Techniques, 7: 845-848.
6. Krichevskij E.S. [i dr.] (1980) Teoriya i praktika ekspressnogo kontrolya vlazhnosti tverdyh i zhidkih materialov, M.: 231.
7. Kraszewski, A. (1984) Determination of the strength of water suspensions using a microwave bridge technique. G. of microwave Power: 361-373.
8. Iskandarov, B.P., Kalandarov, P.I. (2013) Izmeritel'naya tekhnika, № 7: 64-66.
9. Ismatullaev, P.R., Kalandarov, P.I. (2011) Pribory, 7 (133): 40-44.
10. Kalandarov, P.I., Makarov, A.M., Aralov, G.M. (2021) Izvestiya Volgogradskogo gosudarstvennogo tekhni-cheskogo universi- teta, 1 (248): 60-63.
11. Kalandarov, P.I. Logunova, O.S., Andreev, S.M. (2021) Nauchnye osnovy vlagometrii, Tashkent : 175.
12. Kalandarov, P.I., Mukimov, Z.M., Logunova, O.S. (2020) Technical Science and Innovation, 1: 117-123.
13. Iskandarov, B.P., Kalandarov, P.I. (2013) Measurement Techniques, 7: 827-830.
14. Iskandarov, B.P., Kalandarov, P.I. (2012) Elektrotekhnicheskie sistemy i kompleksy, 20: 303-308.
15. Kalandarov, P.I., Iskandarov, B.P. (2021) Pribory, 7 (145): 19-22.
Kalandarov P. I., Mukimov Z. M., Abdullaev H. H. and Avezov N. E. (2021) Measurement of humidity of solid and bulk materials. Software of systems in the industrial and social fields, 9 (1): 16-21. DOI: 10.18503/2306-2053-2021-9-1-16-21.