Intelligent water and fertilizer regulation and control device and method based on PID (Proportion Integration Differentiation) algorithm

Abstract

The invention relates to an intelligent water and fertilizer regulation and control device and method based on a PID algorithm, and the device comprises a data collection unit, a data transmission unit, a water and fertilizer application control unit and a water and fertilizer all-in-one machine unit which are electrically connected. Wherein the data acquisition unit is used for acquiring water and fertilizer flow data of a main pipeline and a branch pipeline, and transmitting the acquired water and fertilizer flow data to the water and fertilizer application control unit at a preset time interval through the data transmission unit; the water and fertilizer application control unit is used for storing and processing the water and fertilizer flow data, constructing a water and fertilizer proportioning model based on a fuzzy neural network PID, and controlling water and fertilizer equipment to complete water and fertilizer application; the water and fertilizer all-in-one machine unit is used for receiving the control instruction of the water and fertilizer application control unit and completing water and fertilizer application work. Through multi-path fertilizer liquid micro-scale proportion control, the delay time during fertilization concentration adjustment is reduced, non-uniformity of water and fertilizers of different plants in the water and fertilizer application process can be prevented, and crop quality difference caused by non-uniform growth vigor of different plants is avoided.

Description

technical field [0001] The invention relates to the technical field of intelligent control, and more specifically, to an intelligent water and fertilizer control device and method based on a PID algorithm. Background technique [0002] Water and fertilizer integrated irrigation technology is an agricultural technology that integrates irrigation and fertilization. The integration of water and fertilizer is to mix soluble solid or liquid fertilizers together with irrigation water according to the nutrient content and the fertilizer requirements and characteristics of crop species. At present, the water and fertilizer all-in-one machines in the market generally have the following shortcomings: [0003] (1) Pre-mixed tanks are often used for fertilization. Before fertilization, water, fertilizer and nutrient solutions must be prepared in the pre-mixed tanks according to a certain ratio of water and fertilizer, and then can be applied. This method not only has low fertilization...

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Problems solved by technology

This method not only has low fertilization efficiency and takes a long time, but also limits the expansion of fertilization scale

[0004] (2) The proportion of water and fertilizer is only controlled by the opening and closing time of each fertilizer valve. The concentration of each nutrient in the water-soluble fertilizer is quite different from the expected one, and precision agriculture cannot be realized; in the actual operation of the machine, there is water pressure in the system , Some external disturbance factors such as air bubbles in the water, some large disturbances may cause the mismatch of the system flow ratio; and the fertilizer obtained by different plants during the fertilization process is uneven, which will cause uneven growth of different plants and cause differences in crop quality

[0005] (3) The functions are relatively single or less. Fertilization can only be done manually or through budget settings based on experience. There is a lack of scientific theoretical support for fertilizer ratios, and it is impossible to adjust the corresponding fertilizer concentration and fertilization strategy according to real-time changes in the surrounding environment of the plants.

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