Sprinkling machine unit water and fertilizer automatic precise proportioning control system and control method

Abstract

The invention relates to a PLC (Programmable Logic Controller) control system and method for automatically and accurately proportioning water and fertilizer of a sprinkling machine unit and belongs tothe technical field of water and fertilizer integration. The system comprises a filter screen, a reservoir, a water inlet, a water pump, a water outlet, a fertilizer mixing tank, a liquid level meterd, a connecting rod rotor, a concentration meter, a fertilizer mixing motor, a liquid level meter a, a fertilizer liquid barrel N (nitrogenous fertilizer), a liquid level meter b, a fertilizer liquidbarrel P (phosphate fertilizer), a liquid level meter c, a fertilizer liquid barrel K (potash fertilizer), an electromagnetic valve a, an electromagnetic valve b, an electromagnetic valve c, a main pipeline, a peristaltic pump, an electromagnetic valve d, a water-fertilizer outlet pipeline, and a PLC. The proportion of fertilizer liquid and the concentration of water and fertilizer can be freelycontrolled according to actual requirements of crops, a PLC control system is adopted, the accuracy and high efficiency of the system are guaranteed, waste of water and fertilizer can be effectively reduced, and accurate control over irrigation and water and fertilizer integration is achieved.

Description

technical field [0001] The invention belongs to the technical field of water-fertilizer integration for water-saving irrigation, is applicable to the automatic preparation of different kinds of fertilizers and different water and fertilizer concentrations in the process of irrigation and fertilization, and particularly refers to an automatic and precise ratio control system and control method of water and fertilizer for a sprinkler irrigation unit. Background technique [0002] my country is a big agricultural country, and the consumption of water and fertilizer is huge. Agricultural water accounts for 60% of the total water volume. In irrigation areas with abundant water resources, there are widespread problems of water waste and low water efficiency. my country's fertilizer consumption has reached the forefront of the world, and the amount of chemical fertilizer used in farmland is 2.1 times the safety limit stipulated by developed countries. However, excessive fertilizati...

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Problems solved by technology

Agricultural water accounts for 60% of the total water volume. In irrigation areas with abundant water resources, there are common problems of water waste and low water efficiency.

my country's fertilizer consumption has reached the forefront of the world, and the amount of chemical fertilizer used in farmland is 2.1 times the safety limit stipulated by developed countries. However, excessive fertilization has led to a decline in fertilizer utilization rate, which is currently only 30%.

In view of the problems of water and fertilizer waste in agriculture, my country is vigorously developing water-saving irrigation projects. The promotion of water and fertilizer integration technology can effectively solve the problem that most of the irrigation and fertilization in my country depends on user experience. The utilization rate of water and fertilizer is low and the uniformity is poor. Serious waste of water and fertilizer

[0003] At present, the application of irrigation and fertilization automation technology in my country has achieved certain results, but there are still problems such as incomplete matching of key components and poor control accuracy of equipment.

The existing domestic water and fertilizer proportioning devices mostly use fertilizers, solenoid valves, sensors, etc. to form a closed-loop system to control the concentration of water and fertilizers, but there are problems such as system concentration fluctuations and poor fertilization uniformity. The precision level of the water and fertilizer integration technology system needs to be improved.

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