Feedback control-based farmland irrigation system and method

Abstract

The invention relates to a feedback control-based farmland irrigation system and method. The method comprises the steps: storing parameters of crop types, crop growth stage division, each growth stage time T, a needed soil moisture content required value X of each growth stage, a needed soil moisture content required lower limit value Y of each growth stage, and an irrigation quota Z of each growth stage into a control center computer; calculating the current growth stage of crops by the control center computer. A soil moisture content sensor is used for collecting farmland soil moisture content information, and the control center computer is used for performing analytical judgment on the soil moisture content information and weather information and then controlling irrigation, so the aim of automatically irritating farmlands can be achieved. The method is simple and efficient in implementation, is intuitive in operation and easy to understand, and is obvious in water saving; compared with an extensive irrigation method, water is saved by more than 40 percent; few-person operation or unattended operation can be truly realized, and the labor cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of farmland water conservancy information, in particular to a farmland irrigation system and method based on feedback control. Background technique [0002] As a large agricultural country, my country's agricultural water consumption accounts for about 80% of the total water consumption. However, due to the generally low efficiency of agricultural irrigation, the utilization rate of water resources is only 45%, while countries with high water resource utilization rates have reached 70% to 80%. %, and there is a serious shortage of water resources in the northern provinces of my country. For many years, the traditional way of watering plants is not only inefficient, but also costly and wasteful. Therefore, solving the problem of agricultural irrigation water is very important for alleviating the shortage of water resources. [0003] Develop from traditional sufficient irrigation to non-full irrigation, monito...

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Problems solved by technology

[0002] As a large agricultural country, my country's agricultural water consumption accounts for about 80% of the total water consumption. However, due to the generally low efficiency of agricultural irrigation, the utilization rate of water resources is only 45%, while countries with high water resource utilization rates have reached 70% to 80%. %, and there is a serious shortage of water resources in the northern provinces of our country. Over the years, using traditional methods to water plants is not only inefficient, but also costly and wasteful.

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