SU1103124A1 - Method of measuring humidity of plant pulp in flow - Google Patents

Abstract

A METHOD FOR MEASURING THE PLANT WEIGHT MOISTURE IN A FLOW in two ways, including determining the density of a material by absorbing gamma radiation, characterized in that, in order to improve the processability of the measurement process, compress the plant mass and measure the compressive strength simultaneously with determining the density, and the ratio between the density and the compressive mass is judged on the moisture content of the vegetable mass, determined from the following expression: (.. 100%, where W is the mass moisture,%; RSL is the compressive mass force. B; p is a raft the mass of the mass, kg / m; g oi, / is the experimentally determined coefficients, per (L, depending on the design, physicomechanical pulses of mass.

Description

The invention relates to moisture measurement of the stem materials of agricultural plant growing and can be used to control the work of agricultural machinery for harvesting and post-harvest processing of plant products.

A known method for determining the moisture content in which the feed material is placed in the measuring capacitor, where it is compacted with a certain compressive force, is then determined by the dielectric constant, which is used to judge the moisture content lj.

The disadvantage of this method is the inability to make continuous measurements of the moisture content of the material in the stream and requires stopping the machine and taking a sample,

The closest to the technical essence of the invention is a method for measuring moisture in a stream using two parameters (microwave and gamma radiation), including determining the density of a material by absorbing gamma radiation, and measuring humidity and irradiating a microwave flux 2.

A disadvantage of the known method is the need to use two types of radiation, which increases the cost and complexity of moisture measurement. In addition, the application of microwave radiation on agricultural machines is difficult due to the large number of moving massive metal parts, resulting in the appearance of reflected radiation beams that interfere with basic measurements, which makes it necessary to apply special measures.

The purpose of the invention is to improve the processability of measuring the moisture content of plant mass in the stream on machines for harvesting and post-harvest processing of crop products.

This goal is achieved by the fact that according to the method for measuring the moisture content of plant mass in a stream, according to two parameters, including determining the density of a material by absorbing gamma radiation, compaction of the plant mass and measuring the compressive force simultaneously with determining the density are performed.

and the ratio between the density and the compressive force of the mass is judged on the moisture content of the plant mass, determined from the following expression:

/ Pc

100%,

) W-.ot-py

W P

Where

- moisture mass.

, /,

C — compressive mass force, H; p is the mass density, kg / m; L, are the experimentally determined coefficients depending on the design, the physicomechanical properties of the mass, and so on. Compaction of plant mass is a widespread operation during harvesting and post-harvest processing of crop products, which allows combining technological operations for processing plant mass with measuring its moisture.

FIG. 1 is a diagram of the technological process of processing food with moisture measurement. According to the proposed method for forage harvesting machinery, side view; in FIG. 2, the same, view A in FIG. 1,

The vegetable mass 1 enters the conveyor 2 into the feeding apparatus, where it is compressed by the feeding rollers 3 and 4 under the influence of the springs 5, the supports 6 of the upper feeding roller 3 are moved along the guides 7 as a result of the influence on the feed roller of the vegetable mass. After compaction, the plant mass is supplied to a further processing unit, for example a grinding apparatus.

The compressive force of the plant mass is determined by the sensors 8 installed in the supports 9 of the lower feed roller 4. At the same time, the density of the incoming mass is determined by a radioisotope density meter consisting of a gamma radiation source 10 and detector 11. The signal from the pressure and density sensors enters device 12, where the moisture content of the plant mass is determined from the empirical ratio found and recorded with the indicating device 1. To determine the compressive force, you can also use the displacement sensors of the upper feed roller. In this case, the compressive force is determined as the product of the spring stiffness and the movement of the support of the feed roller, taking into account the pressure npyxsiH on the support of the supply roller in the absence of movement.

The use of this method of measuring the moisture content of the crop on a forage harvester allows to improve the quality of the harvested feed, to choose the right cutting length and storage method.

Claims (1)

METHOD FOR MEASURING HUMIDITY OF VEGETABLE MASS IN THE FLOW by two parameters, including determining the density of the material by absorbing gamma radiation, characterized in that, in order to increase the manufacturability of the measurement process, the plant mass is compressed and the compression force is measured simultaneously with the determination of density, and by the ratio between the density and compression force of the mass judge the moisture content of the plant mass, determined from the following expression: where W is the moisture content of the mass, P _C w ~ mass compression force, N; p is the mass density, kg / m; ού, β - experimentally determined coefficients depending on the design, physico-mechanical properties of the mass.