Efficient and precise mixing method of fertilizer and water based on soilless cultivation fertilizer and water irrigation system

Abstract

The invention discloses a high-efficiency accurate mixing method of fertilized groundwater on the basis of a soilless culture fertilized groundwater irrigation system. The method includes an expectation segment, a pre-estimate segment and a fine-tuning segment. A sectional type pre-estimate control method is employed. The majority of nutrient solution mother liquor is added into a fertilizer-mixing pot at the start of a fertilizer-mixing process by setting appropriate expectation coefficients. The fertilizer-mixing time of the majority of the nutrient solution mother liquor is increased, a later-stage fine-tuning time is reduced and an over-adjustment phenomenon is avoided. A problem of time retardation during a fertilizer-mixing process of a fertilized groundwater irrigation device is solved. High-efficiency accurate mixing of the fertilized groundwater is achieved through the sectional type pre-estimate control method.

Description

technical field [0001] The invention relates to an efficient and precise mixing method of fertilizer and water based on a soilless cultivation fertilizer and water irrigation system. Background technique [0002] Greenhouse soilless cultivation technology is a method of cultivating crops by means of hydroponics, aeroponics or matrix cultivation, which provides optimal water, fertilizer, air, heat and other growth environments for crops, and optimizes the cultivation of soil-grown crops in traditional natural environments. The method is a comprehensive facility agricultural technology that integrates technologies in multiple scientific fields. The water and nutrients needed for greenhouse soilless cultivation crops need to be taken from the irrigation solution, so fertilizer and water irrigation is one of the most critical technologies in greenhouse soilless cultivation technology. The efficient and precise mixing device of fertilizer and water is very suitable for the produc...

AI Technical Summary

Problems solved by technology

[0003] Traditional fertilizer-water mixing usually adopts artificial mixing method to fully mix various fertilizers and water in proportion. Due to the variety of fertilizer elements, fertilizer-water mixing is time-consuming, labor-intensive and low-precision; currently, the most commonly used fertilizer-water mixing device is Venturi Type fertilizer applicator, the uniformity and concentration of fertilizer and water cannot be precisely controlled; the proportional fertilization pump can realize the mixing ratio control of fertilizer and water, but its ratio adjustment range is small, and it cannot realize real-time detection due to the problem of nutrient solution precipitation in the fertilizer tank Closed-loop automatic adjustment function

[0004] In order to realize high-precision fertilizer-water mixing operation of the fertilizer-water mixing device, it is necessary to mainly solve the long time lag and uniformity problems of fertilizer-water mixing and the calibration of the structural performance parameters of the fertilizer-water mixing device

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