SU953538A1 - Device for determination of grain product infestation degree - Google Patents

Description

The invention relates to agriculture, in particular for controlling the quality of storage of grain products.

A device is known for determining the contamination of grain products by pests of grain stocks, which contains a pest control recorder, made in the form of a mechanical sifter, through which the analyzed product sample is passed for subsequent visual isolation and recalculation of pests of grain stocks into a sieve.

A disadvantage of the known device is the duration of obtaining the results of the analysis, due to the need to sift the analyzed sample, the subsequent visual inspection of the screening products, the manual selective sampling of pests from the grain mass and their subsequent recalculation.

A device for luminescent analysis, in particular agricultural products, including an ultraviolet lamp, an optical system, a measuring unit and a receiver 2 is known.

However, it cannot be used to determine the presence of biological objects in grain products.

The purpose of the invention is to accelerate the determination of the degree of infection.

The goal is achieved by the fact that the measuring unit is made in the form of two parallel electrodes

15, the first electrode is made of two layers - a metal layer and a dielectric layer, and the second electrode is made of four layers — a translucent dielectric layer, translucent

Claims (2)

20 a metal layer, a semiconductor layer and a metal layer, the metal layer of the first electrode and the semitransparent metal layer of the second electrode are connected to the power supply, and the metal layers of the second electrode are connected to the recording device. The diagram shows the proposed device. The first electrode is two-layered. It consists of a layer of dielectric 1 and a layer of metal 2. The second electrode is a four-layer. It consists of a translucent dielectric layer 3 of a semitransparent metal layer k, a semiconductor layer 5 and a metal layer 6. A metal layer 2 and a translucent metal layer 4 are connected to a source 7 pitaya, which uses a high-voltage alternator. The semiconductor layer 5 and the metal layer 6 are connected to the registering device 8. The analyzable product line 9 is placed in the air gap between the semi-transparent layer of dielectric 3 and the layer of dielectric 1. Electrodes are placed in a light-tight casing (not shown). The operation of the device is based on the phenomenon of selective luminescence of bioobjects in strong electric fields .- (Kirlian effect). When electrical potential is applied to the metal layer 2 and the translucent metal layer 4 in the air gap bounded by the dielectric layer 1 and the translucent layer of the dielectric 3, a barrier discharge occurs. In the presence of a grain product, there are 9 living biological objects (insects) in the barrier discharge field. The phenomenon of electrobioluminescence, characterized by a bright contrast luminescence, localized at the location of the insect-dividing grain stocks. The number of these localized brightly lit zones corresponds to the number of grain stock pests in the grain product sample. The four-layer electrode is made in the form of a photogenetic structure, 0 of which the semitransparent metal layer k forms a light-sensitive shut-off n junction with a semiconductor layer that separates the electric charges generated by the electro-luminescence quanta providing the appearance in the external electric circuit of the photocurrent, functionally reflecting the integral bioluminescence intensity in the interelectrode gap where the sample of the grain product is placed. This makes it possible to obtain express data on the characteristic electrical signal (current) characterizing the degree of infection of grain products with live pests. As a dielectric transparent to light rays, any translucent material is used: glass, transparent organic films. Silicon or selenium is used as a semiconductor. The translucent metal layer — gold, silver, tin — is sprayed under vacuum onto a semiconductor. Layers of metal are made of tungsten. The proposed device allows quickly, in 30-50 seconds, to register the degree of charge of grain products. An apparatus for determining the degree of contamination of cereal products with pests, including a power source, a measuring unit and a recording device, characterized in that, in order to accelerate the determination of the degree of contamination, the measuring unit is made in the form of two parallel electrodes, the first electrode being double-layered metal and a dielectric layer, and the second electrode is made of four layers - a translucent dielectric layer, a translucent metal layer, a semiconductor layer and a metal layer, Rich metal layer of the first electrode and the second electrode is a semitransparent metal layer connected to a power source, and the metal layers of the second electrode are connected to the recording device. Sources of information taken into account in the examination 1. Laboratory work on the storage of grain, M., Kolos, 1968, p. 93. 2. USSR author's certificate №, cl. G 01 N 21/64, I960 (prototype).