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Design and test of the control system of integrated irrigation and fertilizer applicato#br#
Yongkui Jin, Hairui Zhao, Xinyu Xue, Zhu Sun
Journal of Intelligent Agricultural Mechanization 2021, 2 (2): 18-25. DOI:
10.12398/j.issn.2096-7217.2021.02.003
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176
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Aiming to solve the problems of long adjustment time and large proportion fluctuation in the current control system of integrated irrigation and fertilizer applicator, the control system composed of PLC controller, touch screen, I/O module, EC/pH sensor was developed by using the technologies of PID variable injection, and proportion, EC/pH realtime adjustment. The hardware composition, fertilizer suction flow detection method, and variable fertilization control method and strategy based on the proportion and EC/pH were studied. The corresponding control software was compiled, and a complete control system was constructed. The performance of the control system was tested, and the PID parameters were optimized. Using the optimized parameters, the proportion adjustment range of the water fertilizer integrated machine was 4‰-20‰, the response time was 80 s, the maximum overshoot was less than 5%, and the steadystate accuracy was 3%. EC regulation range was 800-4000 μs/cm, the response time was 80-120 s, and the steadystate accuracy was 4%. The pH response time was 120 s, and the steadystate accuracy was ±0.1.
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Design and application of management and control system for integration of water and fertilizer in orchard
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Yongkui Jin, Xinyu Xue, Zhu Sun
Journal of Intelligent Agricultural Mechanization (in Chinese and English) 2020, 1 (2): 19-25. DOI:
10.12398/j.issn.2096-7217.2020.02.003
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197
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According to the demand of water and fertilizer integration in orchard, combined with the actual situation of experimental pear orchard, a set of water and fertilizer integration management and control system was designed. It is composed of water and fertilizer integrated system and management and control system, and adopts various irrigation forms, such as micro sprinkler irrigation, drip irrigation, alternate drip irrigation. The management and control system takes the water fertilizer integrated machine as the core, including data acquisition, water and fertilizer management and control and remote control unit, which can monitor the environment, equipment status and parameters, and make decisions and control. Users can view and operate through a variety of ways to achieve information collection, transmission, management, decision-making and control in one. A variety of water and fertilizer application schemes were designed and tested. The results show that the system runs well, and can accurately control different amounts of water and fertilizer. Under the condition of 19% fertilizer reduction, the growth, yield and quality of micro sprinkler irrigation remain unchanged, and the labor saving reaches 90%. Under the condition of 40% drip irrigation water reduction and 35% fertilizer reduction, the growth and quality remain unchanged and the yield increases. Combined with the water and fertilizer application rules, the system realized the integrated management and control of water and fertilizer, and achieved good results, which can provide reference for the design and application of orchard water and fertilizer integration.
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