目 录
摘要.................................................................................................................................................1
引言.................................................................................................................................................1
1.研究现状分析 .......................................................................................................................2
1.1 题研究背景、意义和目的 ..........................................................................................2
1.2 液位控制系统的发展状况 ..........................................................................................3
1.3 课题研究的主要内容 ...................................................................................................3
2.控制方案设计 .......................................................................................................................4
2.1 系统设计 ..........................................................................................................................4
2.2 单容水箱对象特性........................................................................................................5
3.硬件配置..................................................................................................................................8
3.1 控制单元 ..........................................................................................................................8
3.2 检测单元 ..........................................................................................................................8
3.3 执行单元 ..........................................................................................................................9
4.软件设计..................................................................................................................................9
4.1STEP 7-Micro/WIN 编程软件简介............................................................................9
4.2 参数设定及 I/O 分配....................................................................................................9
5.程序编程和系统仿真.....................................................................................................12
5.1 程序设计........................................................................................................................12
5.2 程序仿真和分析 ..........................................................................................................12
6.结论 ..........................................................................................................................................16
参考文献....................................................................................................................................16
附录 ..............................................................................................................................................18
致谢 ..............................................................................................................................................21
