Kutsevol O. Radiofrequency methods and means of grain moisture control

Object of reseach - grain moisture control. Subject of reseach - the methods and means of non-destroying express grain moisture control. Aim of the work - moisture control means errors decreasing at the expense of developing of grain moisture control new methods that not depend neither on non-staible dielectric loss nor on porosity. Theoretical and practical results - abequate electro physical models of the control object for a medium frequencies range have been developed, it differ from the known ones by less quantity of electrical elements and implement simplicity, that permits to use them for definition of informative parameters that not depend neither on non-staible porosity nor on dielectrical loss; a version of the high frequency dielectrometry methods has been validated, it differs from the known ones by using of a vector diagram for definition of a sensitive element current's capacitive component, that has given an opportunity to get an adaptation of a control's result to non-stable dielectricloss; a method of bound moisture control in a grain has been developed, it is based on famous reseaches and provides for their new using; also a mathematical model has been obtained, which quantitatively binds bound moisture and material's dielectric loss index, and enables to define a bound moisture content not only in a grain, but also in other capillary-porosity matherials; a new informative parameter - an index of relative gain of the sensetive element current's capacitive component has been used; which differs from the known ones by it's independence on grain's non-staible granulometric content (porosity) and permits to decrease essentially an error, which reaches 5-10% in existing control means; a device for moisture control with improved metrological characteristics has been developed and introduced; algorithms of control and analytical equations of graduated characteristics have been obtained those permit to automate the control process and to expend easily a list of controlled materials if needed. Degree of introduction - within the field. Area (field) of utilization - agrarian industry complex.