Design and Experiment of Main Road Water and Fertilizer System
In view of the phenomenon of uneven fertilization,low degree of automation and serious lag existing in the inte-grated equipment of water and fertilizer at the present stage,according to the irrigation requirements of saving water and fertilizer in modern agriculture and reducing environmental pollution,a main road integrated water and fertilizer applicator which can realize automatic fertilizer mixing,fertilization and water-saving irrigation is designed.According to the characteristics of EC and pH adjustment process of liquid fertilizer,the hardware of liquid fertilizer control system with SI-EMENS S7-1200 as the core was developed,and combined with MATLAB,the control system of liquid fertilizer EC and pH with fuzzy PID controller was designed.Finally,in order to verify the accuracy and robustness of the fertilization ma-chine in practical application,the dynamic adjustment performance test of the fertilization system was designed.The test data showed that in the fertilization stage.The fuzzy PID control system has shorter steady-state time and smaller over-shoot.Compared with the PID control system,the steady-state time of EC and pH value adjustment is reduced by 37.7％and 52.1％respectively,and the steady-state overshoot is reduced by 1.2％and 2.2％respectively,which can realize the rapid and effective adjustment of the mixed fertilizer solution.It can meet the actual production needs of modern agri-culture.
integration of water and fertilizerfertilizer applying machinefuzzy PIDcontrol of process
万方数据
维普
