宜宾职业技术学院
 毕业论文（设计）
 
           二阶双容水箱液位的串级控制
 
 
               系       部   电子信息与控制化技术
               专 业 名 称       电气自动化术   
               班       级                      姓       名           
               学       号        
               指 导 教 师           

摘  要
双容水槽是工业生产过程的常见被控对象,对其液位的控制通常采用模拟仪表、软件、PLC等单回路控制, 但是，随着现代工业生产过程向着大型、连续和强化方向发展,对控制系统的控制品质提出了日益增长的要求，加之，现代工业生产中的工艺过程日趋复杂 ,对控制系统的指标要求也越来越高。在这种情况下,传统的单回路液位控制已经难以满足一些复杂的控制要求。因此，本论文设计双容水箱液位串级控制系统。在设计中充分利用自动化仪表技术，计算机技术，通讯技术和自动控制技术，以实现对水箱液位的串级控制。并从系统硬件组成、I/O口分配、控制方式以及工控组态人机监控界面设计等方面进行了详细论述，具有较强的实用性.
关键词： 双容水槽；串级控制；液位；PID整定；组态
Abstract
Double capacity tank is a common controlled object in industrial production process. The control of liquid level is usually controlled by analog instruments, software and PLC. However, with the development of modern industrial production process, the control quality of control system is increasing. In this case, the traditional single loop liquid level control has been difficult to meet the requirements of some complex control. Therefore, this paper designs a dual capacity water tank liquid level cascade control system. In the design of the full use of automation instrumentation technology, computer technology, communication technology and automatic control technology, to achieve the level of the water tank cascade control. And from the system hardware composition, I/O port allocation, control mode, and industrial control configuration man-machine interface design and other aspects are discussed in detail, with strong practicality.
Key words: double sink; cascade control; liquid level; PID configuration; configuration