SU762811A1 - AUTOMATIC POLICE CONTROL DEVICE 1 ί - Google Patents

Description

The invention relates to agriculture and is intended for automatic control of irrigation during the reproduction of fruit and berry crops. Green grafting.

Known devices based on the so-called "electronic sheet", which contain a sensor that simulates a leaf of a plant, and actuating devices that control irrigation depending on changes in the parameters of the sensor [£]].

The closest to the invention of the technical essence and the achieved result is an automatic humidification device, which contains a sensor humidification, a threshold element with an adjustable response level and an executive unit [2 (3.

The drawbacks of such a device are the possibility of changing only the threshold for turning on the irrigation and the lack of control over the moment of shutting off the irrigation. This reduces the versatility of the device and makes it difficult to use for different cultures.

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The purpose of the invention is the expansion of the technological capabilities of the device.

This goal is achieved by the fact that the automatic irrigation control device, which includes a humidification sensor connected in series, a threshold element with an adjustable response level and an execution unit, contains an additional threshold element with an adjustable response level and a logic element, the input of the additional threshold element being connected to the sensor output moistening, the inputs of the logic element are connected to the output of the threshold elements, and the output of the logic element 'is connected to the input olnitelnogo; block.

FIG. 1 shows a functional diagram of the proposed device, and FIG. 2 is one of the possible diagrams of the device operation.

The device contains a humidification sensor 1, threshold elements 2 and 3 with an adjustable response level, connected by inputs to the output of a humidification sensor, a logical element3

! '4, connected by inputs to the outputs of threshold elements with an adjustable response level, the executive unit 5, connected by the input' to the output of logic element 4, block 6 of the alarm system about the alarm conditions in the irrigation system, connected by the input to the output of the humidification sensor, and the alarm unit contains .threshold elements 7 and 8 ,. inputs connected to a humidification sensor, an OR 9 circuit, connected by inputs to the outputs of threshold elements 7 and 8, and a light and sound alarm node 10 connected by an input to the output of the OR circuit 9.

The device works as follows.

For each entry of the cuttings, an optimum wetting zone is determined experimentally, the most favorable for rooting the cuttings, and the zone of trouble-free operation, i.e. moisture limits that are not harmful to plants. The threshold elements 2 and 3 are adjusted to the appropriate limits and operate in the sensor when the humidity drops below the established limits.

The diagram shows / irrigation time (11), drying time (12), optimal moistening zone (13), irrigation off zone (14), irrigation on zone (15), trouble free operation zone (16), irrigation does not turn on (17 ), watering does not turn off (18).

It is accepted that with the gradual drying of the sensor from the maximum possible level, the first is triggered, i.e. produces a voltage, threshold element 8, then element 3, element 2, element 7. In this case, logic element 4 gives a signal to turn off the irrigation when voltage appears at the output of element 2, and turns off the watering when the voltage at the output of element 3 disappears when it dries sensor below the permissible limit appears voltage at the output of the element 7, which through the circuit 9 OR includes node 1 (5

11 4

light and sound alarm, when overwetting above the permissible limit, the voltage at the output of the element 8 disappears, and the light and sound alarm node 10 also turns on. The humidification sensor 1 can be performed on known principles, for example, taking into account changes in the conductivity or frequency of the generator, depending on the amount of water deposited on the sensor. As the Executive unit 5 can be used a known solution, for example, on the basis of electromagnetic valves, including water supply.

The application of the proposed device allows to improve the accuracy of irrigation control, to expand the technological capabilities of existing devices ..

Claims (1)

Claim An automatic irrigation control device that includes a humidification sensor connected in series, a threshold element with an adjustable response level and an execution unit, characterized in that, in order to expand technological capabilities, it is equipped with a logic element and an additional threshold element with an adjustable response level, and an additional input the threshold element is connected to the output of the moisture sensor, the inputs of the logic element are connected to the outputs of the threshold elements, and the output is cal element is connected to the input of the execution unit.