Water and fertilizer integrated precise control method and system based on double closed loops

Abstract

The invention discloses a water and fertilizer integrated precise control method and system based on double closed loops, the system comprises a fertilizer injection ring, an irrigation ring and a mixing actuator, the fertilizer injection ring comprises a fertilizer injection amount controller and a water and fertilizer solution detector connected with the fertilizer injection amount controller, and the water and fertilizer solution detector is used for obtaining feedback of the fertilizer injection amount from a water and fertilizer solution; the fertilizer injection amount controller is used for controlling the multi-channel fertilizer applicator to output stable fertilizer injection amount; the irrigation ring comprises an irrigation amount controller and a water flow sensor, the irrigation amount controller is connected with the water flow sensor, the water flow sensor is used for obtaining feedback of the water injection amount from the water and fertilizer solution, and the irrigation amount controller is used for controlling the booster pump to output stable irrigation amount and eliminate irrigation amount deviation; the mixing actuator is connected with the fertilizer injection ring and the irrigation ring, and a water-fertilizer stock solution of the fertilizer injection ring and filtered water of the irrigation ring are mixed in the mixing actuator to form a water-fertilizer solution with fixed concentration. The water-fertilizer ratio can be accurately and rapidly controlled, and the water-fertilizer ratio adjusting time is saved.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation, and more specifically, relates to a method and system for precise control of water and fertilizer integration based on double closed loops. Background technique [0002] The application of water and fertilizer by agricultural producers is still guided by the application experience, and extensive irrigation and fertilization methods such as flood irrigation and furrow irrigation are used. The lack of accurate and reliable data support can easily lead to problems such as waste of resources, soil compaction, environmental pollution, and burning of crops. appear, and it is difficult to maintain long-term high-quality production. In order to improve the utilization efficiency of water and fertilizer, reduce environmental pollution, and ensure the high-quality production of crops, the integrated technology of water and fertilizer came into being. [0003] The design and research of wat...

AI Technical Summary

Problems solved by technology

This system improves irrigation efficiency and reduces costs, but the proportioning equipment uses a proportional control unit, which takes a long time to reach a steady state

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