Method for measuring moisture of grain mass under vibration

Abstract

A detailed analysis of the end-to-end conductivity was carried out using experimental data from the measurement scheme, presented in the article. The oscillograms of changes in the time of the specific active conductivity of wheat grains of the given moisture at a given amplitude of vibration (on a direct current) were removed. Experiments have shown, that specific active conductivity varies from a value corresponding to a lack of vibration to a corresponding value, subject to vibration, i.e., almost more than 3 times. The minimum value of end-to-end conductivity when exposed to vibration, as shown by the experimental test, is almost an order of magnitude less than its average value. The decrease in the value of end-to-end conductivity relative to its average value is manifested in the intervals of time corresponding to the moments of movement of the sensor downwards, that is, in the direction of acceleration of gravity, under the influence of a vibrator. The work offers a way to measure the moisture of the grain mass and the device for its implementation. A distinctive feature of the developed method is that the controlled grain mass is filled in the cavity of the capacitive sensor and subjected to vertical vibration. The registration of dielectric permeability (moisture) is made at intervals of time corresponding to the minimum value of end-to-end conductivity. The proposed method makes it possible to significantly increase the accuracy of measuring the moisture content of the grain mass. This is especially important in conditions of high moisture.

Justification of constructive and technological parameters of vibrating seeding unit

“…Additional mixing of seeds or fertilizers in the bunker during sampling is not allowed. We find the average weight consumption of winter wheat seeds [6]:…”