PLC自动门毕业设计论文.doc

目 录 摘要································································2 引言································································3 第一章概述··························································4 1.1国内外自动门发展状况············································4 1.2本课题研究的内容················································4 1.3本课题研究目的和意义············································5 第二章自动门控制总体方案设计········································6 2.1自动门功能需求分析···············································6 2.2系统设计的基本步骤···············································6 2.3自动门技术参数的确定·············································8 2.4自动门的机械传动机构设计·········································8 第三章自动门硬件系统的设计··········································9 3.1控制系统结构设计·················································9 3.2可编程控制器（PLC）的选用······································10 3.2.1PLC概述····················································10 3.2.2可编程控制器（PLC）的选用··································11 3.3驱动装置的选用··················································13 3.4变频器的选用····················································13 3.4.1变频器原理··················································13 3.4.2变频器的选型················································14 3.4.3变频器的参数设定············································15 3.5感应开关的选型··················································16 3.6自动门系统I/O分配表············································17 3.7控制系统的电器接线··············································18 第四章控制系统软件的设计···········································18 4.1PLC梯形图的概述················································18 4.2梯形图编程环境··················································19 4.3程序流程图······················································21 4.4梯形图的设计及指令··············································21 第五章系统调试·····················································23 5.1梯形图程序的下载················································23 5.2程序调试记录及结果分析··········································23 致谢··············