Buried type water and fertilizer application system control method and device based on internet of things

By acquiring soil and pipeline parameters through IoT technology, constructing pressure weights and salinity damage terms, and generating freshwater alternation duty cycles, the problem of insufficient flexibility in water and fertilizer regulation in saline-alkali land in traditional regulation schemes is solved, realizing dynamic regulation of the saline-alkali environment and precise water and fertilizer application.

CN122162580APending Publication Date: 2026-06-09NINGXIA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGXIA UNIVERSITY
Filing Date
2026-05-11
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing groundwater and fertilizer regulation schemes lack the ability to deeply couple and calculate multidimensional parameters in saline-alkali land cultivation, resulting in a simple irrigation regulation logic and insufficient flexibility. They are unable to dynamically perceive the migration pattern of salt in the soil, leading to uneven flow distribution and local salt accumulation, making it difficult to achieve precise water and fertilizer application.

Method used

By using an IoT-based approach, parameters such as soil conductivity, moisture content, and pipeline pressure difference are acquired. Pressure weights and salinity terms are constructed, and a nonlinear amplification factor is used to generate saline coupled state variables. Combined with pressure feedback terms and overpressure penalty exponents, a freshwater alternation duty cycle is generated to control valve opening and closing, thereby achieving dynamic regulation of water and salt stress.

Benefits of technology

It has achieved keen detection and in-depth quantification of saline-alkali environment, offset the negative interference of pipeline pressure fluctuations on the uniformity of water output, ensured stable soil improvement effect under complex working conditions, and achieved the goal of spatially balanced precise water and fertilizer application.

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Abstract

The application provides a buried type water and fertilizer infiltration and irrigation system control method and device based on Internet of Things, relates to the technical field of buried type water and fertilizer infiltration and irrigation, and collects initial soil conductivity, water content, pipeline pressure difference and main pipe pressure of each control area, determines pressure weight according to pressure deviation degree; constructs a basic salt damage item from the difference between the initial soil conductivity and the salt tolerance threshold, obtains a salt water coupling state quantity after the nonlinear factor gain determined by the water content; constructs a pressure feedback item by using the pipeline pressure difference, corrects the basic seepage coefficient in combination with the salt water coupling state quantity, weights by the pressure weight, and generates a pressure salt micro water flux by superimposing the basic flux; calculates a fresh water alternating duty cycle according to a pressure salt micro water flux proportion and an overpressure penalty item caused by the main pipe pressure, and drives the valve to execute an action accordingly. The application realizes on-demand water supply and efficient pressure salt for saline-alkali environment, and greatly improves the precision of water and fertilizer matching.
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