SU709995A1 - Method of analysis of grain - Google Patents

Description

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The invention relates to the field of evaluating grain quality indicators and can be used in the process of storing and processing grain.

There is a method of analysis of grain, involving the determination of moisture and bulk density by the method of drying and the gravimetric method 1.

The disadvantage of this method is that the analysis process is long and complex, and therefore does not allow its use in the operational control of the quality of grain under production conditions.

The aim of the invention is to increase the expressiveness and accuracy of grain analysis.

This is achieved by the fact that the bulk density of the grain is determined at the actual moisture content depending on the level of the sample, and the electrical capacitance of the grain sample is measured, and the moisture content and the bulk mass of the grain at the base humidity () are determined simultaneously.

   “Fgde N - volume mass of grain at actual humidity;

Wj is the basic moisture content of the grain; W0 is the actual moisture content of the grain; a; (, a2, a, - constant coefficients.

NMf - K, C - () (Nr-N,) ko,

C - the value of the electrical capacity of the sample of grain;

N is the volume mass of the grain at which the electrical capacity was graduated; Кр, К, К ,, К ,,, К, Kg - constant coefficients.

FIG. 1 is given a block diagram of a device that implements the proposed method; in fig. 2 is a graph of grain mass versus actual grain moisture content N f (,) .. The device contains a sensor 1

electrical capacitor, electrical converter circuit 2, which forms a signal proportional to the humidity of the sample, an optical level sensor 3 with a photoelectric circuit.4, the output signal of which is proportional to the measured volumetric mass and is fixed by indicator 5. In addition, the device includes a block 6, which generates a signal the actual humidity, to the input of which blocks 2.4 are connected, and also block 7, which determines the signal proportional to the calibration value of the bulk mass. A signal proportional to the actual humidity is fed to the indicator 8. The value of the basic volumetric mass is formed in block 9, the input of which is connected to blocks 4,6, and also block 10 is the unit of basic humidity. The signal from block 9 is supplied to the indicator 11 of the basic volumetric mass.

The method is carried out as follows.

A sample is taken from the incoming batch of grain, from which a sample of grain of a given mass is extracted and placed in a primary transducer with a level sensor 3 and sensor 1 of the electrical capacity of the grain, from which signals are obtained that are proportional to the measured bulk mass of the grain and its actual humidity. The signal proportional to the moisture content of the grain, taking into account the amendment to the calibration value of the bulk mass, is adjusted according to the measured volume in the blocks b and 7, which allows to obtain the value of the actual humidity. Correction and correction signals come from blocks 7 and 4. The actual humidity signal is displayed on the indicating or recording device - block 8 A signal proportional to the basic volumetric mass is formed in block 9 into which correction by measured humidity is entered - from block 6 and based on basic humidity - from block 10, and received, the signal enters the secondary device, which shows the value of the basic volume mass.

Claims (1)

Invention Formula A method of analyzing grain, which involves taking a sample of grain and determining its moisture content and bulk density, which is indicated by the fact that, in order to improve the accuracy of the analysis, the bulk mass of grain is determined at the actual humidity depending on the level of the sample and the electrical capacitance of the grain sample is measured, and moisture and bulk grain mass at basic moisture content (N) are determined simultaneously by the appropriate formulas  -% yrf f- 5 . Where N - Volume mass of grain at the actual humidity Wjj- is the basic grain moisture; Wq, is the actual moisture content of the grain; a, a, constant coefficients. , 0 (K C K C% K cHKj5 (Nr-Nv, where C is the value of the electrical capacitance of the grain sample; NP is the volume mass of the grain at which the electrical capacity was graduated; Кр, К, К ,, Kj, К, Kj - constant coefficients. Sources of information taken into account during the examination 1. Kazakov E.D. Methods for determining the quality of grain, M., 1967, p. 70180.