SU1316599A2 - Arrangement for regulating ground watel level and measuring soil water balance - Google Patents

Abstract

This invention relates to agriculture. The purpose of the invention is accuracy and reliability of measurement and control. The device includes a tank 1 with a soil monolith. Capacity 2 of the water level control.1 in the lysimeter serves as a groundwater level controller. The water-retaining unit is designed as a dispenser 3 rudpaBflu ecKOjfi Sli Эл Al & K fnpu fecka cSjfja 9 (L - & f. 00 05 SP with co. Infiltro

Description

evaporation. The infiltration dispenser 4 was used as the infiltrate discharge unit. With precipitation, the groundwater level rises in tanks 1 and 2. The infiltrate enters the infiltration dispenser 4 through a drain pipe and an open solenoid valve (EHC) 7. When collecting a certain dose of infiltration by the i3KC 10 electronic switching circuit signal, the EMC 7 closes, and the EMC 8 from the Invention relates to agriculture, in particular to devices for determining the moisture balance, the infiltration and evaporation of water in lysimeters, and can be used for water balance studies on reclaimed land, as well as to maintain the WATER level in water metering devices.

The aim of the invention is to improve the accuracy and reliability of measurements and adjustments.

The drawing shows a diagram of the device.

The device includes a tank 1 with a soil monolith, and a tank 2 controlling the water level in the lysimeter, which acts as a regulator of the groundwater level, which are connected by a tube as communicating vessels, as well as a water supplying unit in the form of an evaporation meter 3, the form of the dispenser 4 infiltration. The device also contains solenoid valves 5-8, placed on a fixed control panel 9, an electronic switching circuit 10 that functions as switching and control nodes, an alternating generator 11, for example, sinusoidal, a voltage of 20 kHz, an amplitude of 2 V, a block 12 the power supply for recording measurement and control results and the source of water supply 13. Capacity 2 controls the level of water n dispensers 3 and 4 evaporation and infiltration have electrocontact sensors 14 - 16 levels of water.

It closes to drain the infiltrate dose. Information about the number of doses is transferred from the EC-10 to the digital display and to the recorder in the power and recording unit 12. When moisture evaporates, the water level in the tank x 1.2 drops, the EKS-10 opens the EJ dose of water from the dispenser 3 enters the tank 2. Information about the number of doses goes to the counting and self-recording devices in block 12. 1 Cp. f-ly, 1 ill.

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The device works as follows.

When precipitation falls, the level of groundwater in tank G with soil motsopite and, accordingly, in the tank 2 connected to it, controls the water level in the lysimeter, increases. Through the drain tube and the open solenoid valve 7, the infiltrate enters the infiltration dispenser 4. When a certain amount of infiltrate in the dispenser (dose) is collected by the signal of the electronic switching circuit 10, the valve 7 is closed and the valve 8 is opened to drain the dose of the infiltrate. The dosage information, i.e.

The amount of infiltration is received from the circuit 10 on the digital scoreboard and the recorder in the power and registration unit 12.

In case of Evaporation of moisture, the groundwater level in the tank decreases.

1 with a monolith of the soil and in the tank 2 - level control, the electronic switching circuit 10 opens valve 6, and a certain amount of water from evaporation meter 3 arrives in tank 2, the process continues until it is restored to the last original level, topping is carried out discretely, the dose value is determined The evaporation dosing unit 3 controlled by circuit 10. Information on the number of doses topped up, i.e. about the amount of evaporated moisture, goes to the other counting and recording devices in block 12. The valve 5, controlled by the electronic switching circuit 10, regulates the flow of water from the source 31

nick 13 water supply to the evaporation meter 3.

Supply to electrocontact sensors 14–16 instead of direct voltage (24 V) from the power supply and recorder 12 of the variable, for example, sinusoidal, voltage 2B at 20 kHz from the generator 11 eliminates electrochemical corrosion of water level sensors. Performing an electrocontact needle of level sensors from low-alloyed steel with an angle of sharpening it at the base 30 makes it possible to simplify and cheapen the structure while at the same time minimizing the formation of a conductive meniscus between the needle and the liquid (water)

Thus, the proposed device allows to increase the accuracy and operational reliability, which, in turn, provides higher accuracy and reliability of automatic control of the level of groundwater and measurement of the water balance of the soil.

Or L. Veselovska 2376/2

Compiled by G.Paraev Tehred L.Oliynyk

Co Po

Circulation 629 VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. Production and printing company, Uzhgorod, Projecto st., 4

165994

Claims (2)

1. A device for adjusting the level of groundwater and measuring the water balance of the soil according to the author. No. 1052198, characterized in that, in order to ensure the accuracy and reliability of measurement and adjustment, the device is equipped with an additional /five 0 five A level sensor installed in the level control tank on the control panel, made not connected, and an alternate direct-current generator 1 and connected via an electronic switching circuit to all the device level sensors made in the form of electrical contact sensors. 2. The device according to claim 1, about aphid -, so that, in order to simplify the design, the level sensors have electrocontact needles from low alloy steel with a sharpening angle of 30 °. Proofreader L.Pilipenko Subscription