Crop evapotranspiration model-based intelligent drop irrigation control system and method thereof

Abstract

The invention relates to a crop evapotranspiration model-based intelligent drop irrigation control system and a method thereof. The drop irrigation system is arranged in a greenhouse and is characterized by comprising a data acquisition module, multiple A / D conversion modules connected with the data acquisition module, a controller (3), a D / A conversion module, a driving circuit and an execution mechanism, wherein the data acquisition module is used for acquiring a corresponding input signal, the signal output terminal of the data acquisition module is connected with the signal input terminal of a corresponding A / D conversion module, the signal output terminal of the A / D conversion module is connected with the signal input terminal of the controller (3), the controller (3) controls an output driving circuit connected with the controller, and the execution mechanism is operated by virtue of the driving circuit to realize irrigation. In the invention, the evapotranspiration is calculated and is indirectly taken as irrigation volume to carry out irrigation on a crop, and moisture required by the crop is supplemented more accurately; and the structure is simple, and the cost is low, thus the system and the method provided by the invention have high promotional value.

Description

technical field [0001] The invention relates to a crop irrigation system and an irrigation method thereof, in particular to an intelligent drip irrigation control system and method for calculating the crop irrigation amount from a crop evapotranspiration model, belonging to the field of agricultural science and technology. Background technique [0002] In the existing drip irrigation control system, there are mainly three quantitative indicators used for irrigation decision-making: ① Determine the irrigation time and water volume according to the soil moisture status of the farmland, and the factors considered include the upper and lower limits of suitable water for different crops, the soil water balance equation and parameter selection Wait. This method is relatively accurate, but this method is limited by equipment, labor and funds; ②Determine whether irrigation is needed based on the physiological response information of crops to water deficit, and the indicators include...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing irrigation controllers are small in scale, limited to experiments and theoretical discussions, and the developed products are expensive, the one-time investment is too large, and most farmers cannot afford it. An intelligent drip irrigation control system and method based on crop evapotranspiration model to reduce waste of water resources

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