目录
1 绪论.....................................................................................................................1
1.1 课题研究背景及意义 ......................................................................................1
1.2 液压升降机国内外发展现状 ..........................................................................1
1.3 本文主要研究内容..........................................................................................2
2 液压升降机简介 ..................................................................................................3
2.1 液压升降机的工作原理 ..................................................................................3
2.2 液压升降机组成..............................................................................................4
3 液压升降机控制系统硬件设计 ...........................................................................5
3.1 系统总体设计..................................................................................................5
3.2 控制系统硬件选型..........................................................................................6
3.2.1 比例变量泵的选型 ................................................................................6
3.2.2 PLC 及模块选型 .....................................................................................6
3.2.3 触摸屏选型............................................................................................6
3.3 控制电路设计..................................................................................................7
3.3.1 PLC 的 I/O 存储地址分配 ......................................................................7
3.3.2 输入输出回路设计 ...............................................................................8
3.3.3 电液比例控制电路设计 .......................................................................8
3.3.4 主电路设计..........................................................................................10
3.3.5 抱闸、门锁、安全运行电路设计 ......................................................11
4 液压升降机控制系统软件设计..........................................................................13
4.1PLC 概述..........................................................................................................13
4.2PLC 软件设计 ..................................................................................................13
4.2.1 楼层信号产生与清除设计 ..................................................................14
4.2.2 选层信号的登记、清除及显示设计 ..................................................15
4.2.3 停层信号的产生与清除设计 ..............................................................16
4.2.4 停车制动设计......................................................................................16
4.2.5 启动加速与稳定运行设计 ..................................................................17
4.2.6 速度曲线设计......................................................................................18
