【摘要】 针对三容液位控制对象,设计出一套面向多用户的过程自动控制系统。阐述了整个上位机和下位机的设计过程,并针对三容对象由电流信号控制的情况.着重分析设计了脉宽调制(PWM)在此控制过程中的应用,同时给出了相应的程序流程图。实际结果表明此套控制装置功能完善、运行效果良好。更多还原

【Abstract】 Based on the plant of there-tank liquid level system, this paper designs a set of process control system which provided with multiusers. The designed process of the whole system is described. For the plant is controlled by current signal, the paper emphatically develops the rules of Pulse-Width Modulation (PWM) and provides the corresponding program chart. The practical results shows the control device has excellent running performance.更多还原