Device for measuring dynamic action of rain in soil

FIELD: agriculture.

SUBSTANCE: device comprises a housing, a porous measuring plate which pores are filled with water, a flexible screen with sensors which are electrically connected to the display device. The novelty is that the lateral inner surface of the housing is provided with microcells hydraulically interconnected and filled with polyacrylamide.

EFFECT: possibility of measuring the dynamic action on the soil of rain with the addition of polyacrylamide, due to the presence of microcells filled with polyacrylamide.

1 dwg

 

The invention relates to agriculture and can be used to assess the risk of water erosion.

There are many devices for measuring the dynamic action of rain on the soil (Methods of analysis water soil erosion. - Chisinau: 1976. - P.129-136) and (Hydraulic engineering and land reclamation. - 1983. No. 7. - P.21-23).

Devices include measuring plate, which captures the dynamic pressure drop fluid flow.

A disadvantage of the known devices is the low accuracy of the measurements. Flat, dense surface of the measuring plate is different from the porous surface of the soil, which introduces error in the measurement results.

The closest to the goal and the essential technical characteristics of the proposed technical solution is a device for measuring the dynamic action of rain on the soil, comprising a housing, a porous measuring plate, the pores of which are filled with water, elastic screen with the sensors described in the as of the USSR 1362418 published 30.12.1987, bull. No. 48.

A disadvantage of the known device is limited functionality in the measurement of dynamic effects on the soil of the rain with the addition of polyacrylamide.

The aim of the invention is the extension of functionality.

This goal is achieved by the fact that lateral internal surfaces shall be casings are provided with microwells, hydraulically interconnected and filled with polyacrylamide.

The casing is a frame for connection of the machine. It limits with the sides closed cavity. Porous plate with pores filled with water, simulates the pore space of the soil surface. When getting drops into the pores of the measuring plate in a porous moisture occurs hydrodynamic pressure that deforms the elastic screen. Deformation screen capture sensors and displays an indicating instrument. The inner side surface of the housing is equipped with a micro-cells. The average diameter of the microwells is from 2 to 5 mm. In diameter less than 2 mm increases the complexity for uniform filling of the polyacrylamide of microwells. When the diameter of the microwells more than 5 mm increases the likelihood of runoff polyacrylamide to the base of the housing. The depth of the cells shall not be less than 3 mm, With the smaller depth of the cell increases the likelihood of runoff polyacrylamide. Cell punching walls are hydraulically interconnected. This ensures an even distribution of polyacrylamide on the surface of the housing. The microwells filled with polyacrylamide in the gel state. Polyacrylamide, gradually dissolving in the water filling the pores of the measuring plate, creates a solution corresponding to drops of rain with the addition of polyaki the amide.

The unit explains the figure. In Fig. shows a section of a device for measuring the dynamic action of rain on the soil. In the porous body 1 is installed, the measuring plate 2, the pores of which are filled with water 3. The inner side surface of the housing 1 is equipped with a micro-cells 4, which is filled with polyacrylamide 5. The bottom surface of the porous plate 2 equipped with a flexible screen 6, which is fixed to the sensor 7 is electrically connected with the indicating device 8.

The device operates as follows. Fill the microwells 4 polyacrylamide 5. The pores of the porous measuring plate 2 is filled with water 3. Polyacrylamide 5 flows into the water 3 and creates the solution corresponding to drops of rain with the addition of polyacrylamide. It is put in a drip flow of rain with the addition of polyacrylamide fluid (Fig. not shown). The porous plate 2 is placed perpendicular to the axis drip of fluid flow. The drop of rain hits at the right time. In the pore fluid 3 is formed hydroshock pressure that deforms the elastic screen 6. The sensors 7 fix the amount of elastic deformation of the screen 6 and transmit the information to the display device 8.

Deflection is proportional to the magnitude of the dynamic action of drip flow on the ground. The measurement device tazrout intensity of sediment from runoff is grounds for drip fluid flows with different intensity and size of droplets.

The porous plate is made of water-stable material: polymers, composites, cement stone, the thickness of the porous measuring plate take from 3 to 8 mm Square porous plate shall not be less than 10 cm2. For smaller plates increases the duration of measurements. As the elastic screen used white rubber with a minimum thickness of 300 microns. The length measurement is taken from 6 to 10 minutes Reduced measurement period is less than 6 min reduces the accuracy of measurements due to insufficient number of drops falling on the plate. Increasing the measurement duration more than 10 minutes increases labor costs, without increasing the measurement accuracy. The device made of a solid polymer material, for example polycarbonate. When stamping on the inner side of the case create a microcell, hydraulically interconnected punching walls.

As sensors use strain gauges, gauge - tantostanze.

Compared to similar proposed device provides a measurement of the dynamic action on the soil of the rain with the addition of polyacrylamide, due to the presence of microwells filled with polyacrylamide.

Device for measuring the dynamic action of rain on the soil, comprising a housing, a porous measuring plate, p is the market which is filled with water, elastic screen with sensors electrically associated with the indicating device, characterized in that the lateral internal surface of the housing is equipped with a micro-cells that are hydraulically interconnected and filled with polyacrylamide.



 

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