SU1683576A1 - Device for measuring evaporation and atmospheric precipitation - Google Patents

Abstract

The invention relates to agriculture, in particular, to devices for measuring soil water balance components. The purpose of the invention is to simplify the design and improve the usability of the device. The device contains an open container 1 with water, equipped with feed 2 and drain 4 nozzles and an additional electro-contact sensor 14 level. The water supply and discharge units 5 include metering units with sensors 15 and 16 levels and bypass valves 6-9, the level metering circuit contains a power supply unit, a recording unit 12, an electronic switching unit 10, a sinusoidal voltage generator 11. In case of precipitation, the latter, the passage through the discharge unit, are registered by the registration unit 12. When the evaporation is recorded, the number of doses of water passing through node 3 is recorded to maintain a constant level in the open water tank 1. 1 hp f-ly, 1 ill. 7J (L s

Description

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The invention relates to agriculture, in particular, to devices for measuring the water balance of the soil.

The aim of the invention is to simplify the design and improve the usability of the device.

The drawing shows a block diagram of a device for measuring evaporation and atospheric precipitation.

The device contains an open container 1 filled with water and connected by a pulling nozzle 2 with a water suction unit 3 with a drain nozzle 4 with a discharge unit 5. The evils of the water supply 3 and the discharge 5, made in the form of metered containers (dozorov), are equipped with by-pass solenoid valves 6-9. The metering circuit includes an electronic switching unit 10, a sinusoidal voltage generator 11, a recording unit 12 with a power supply unit. The electronic switching unit 10 is designed to control the operation of the entire device. The water supply of the device is carried out from the source 13 of the water supply. The liquid level is recorded by an additional electrocontact level sensor 14 and electrocontact level sensors 15 and 16.

A device for measuring evaporation and precipitation operates as follows.

With precipitation, the water level in the open tank 1 rises. Through the drain pipe 4 and the solenoid valve 8, controlled by the electronic switching unit 10, the sediments enter the dispenser of the discharge unit 5. When a certain amount of precipitation is collected in the metering device by the signal of the electronic switching unit 10, the valve 8 is closed and the valve 9 is opened to drain the dose of precipitation. The dosage information, i.e. The amount of precipitation is received from unit 10 on a digital display and a recorder in registration unit 12 with a power supply unit.

In the case of evaporation of moisture, the water level in the open tank 1 decreases, the electronic switching unit 10 opens the valve 7 and a certain amount of water from the water supply metering unit 3 enters the open tank 1. The process continues until the initial level is restored, topping is performed discretely, the dose value determined by dispenser 3, controllable unit 10. Information on the number of doses topped up, i.e. about the amount of water evaporated enters another counting

and the recorder in the recording unit 12 with the power supply. The valve 6, controlled by the unit 10, regulates the flow of water from the water supply source 13 to the dispenser

3

Supply to level 14-16 electrical contact sensors in open and metered sinusoidal voltage capacitances, for example, frequency 20 kHz and amplitude 2 V, s

The generator 11 eliminates the electrochemical corrosion of the sensor contacts, which increases the reliability of the device and ensures high accuracy of automatic control and measurement of the monitored parameters.

Claims (2)

1. A device for measuring evaporation and precipitation, containing an open container with water, a water supply unit and a discharge unit, each of which is designed as a dosing container with an electrocontact level sensor and with a supply and drain nozzles, which are installed bypass electromagnetic valves, level measurement circuit, made in the form of an electronic switching unit, registration unit with a power supply unit, the output of which is connected to the input generator of sinusoidal voltage, as well as the source of water supply, the output of which is communicated with the drain pipe of the water supply node, with the corresponding outputs of the electronic switching unit connected to the control inputs of the bypass solenoid valves, the recording unit with the power supply, and the corresponding inputs of the electronic switching unit are connected to the output of the generator sinusoidal voltage and electrocontact level sensors, characterized in that, in order to simplify the design and increase ease of operation, it is equipped with additional an electro-contact level sensor installed in an open container with water, in which the discharge nozzle of the discharge unit is placed, while the supply nozzle of the water supply unit is in communication with the bottom of the open containers with water, and the output of the additional electro-contact level sensor is connected with the corresponding input of the electronic switching unit. 2. The device according to claim 1, wherein the inlet opening of the drain the outlet of the discharge unit is located in the upper part of the open container with water.