摘要
Abstract
To address the problems of high energy consumption,low temperature control accuracy,and insufficient auto-mation level in traditional agricultural dryers,this paper designs an energy-saving and temperature control system based on the Siemens S7-200 PLC and M440 inverter.The S7-200 serves as the core control unit,while multiple tempera-ture and humidity sensors are used to collect real-time environmental data inside the drying chamber.A PID algorithm is applied to achieve precise regulation of hot-air temperature,and the M440 inverter is employed to realize stepless speed control of the fan motor.In addition,a human-machine interface(HMI)is designed for parameter setting,sta-tus monitoring,and fault alarming,which significantly enhances the system's intelligence and visualization.Experimen-tal results show that the proposed control system significantly improves temperature control accuracy under different crop drying conditions and reduces energy consumption by 18.6%compared with traditional constant-speed control meth-ods,thereby greatly enhancing drying efficiency and energy utilization.关键词
S7-200PLC/M440变频器/农用烘干机/节能控制/温度调节Key words
S7-200 PLC/M440 inverter/agricultural dryer/energy-saving control/temperature regulation分类
农业科技
