工厂化养殖循环水控制系统设计

工厂化养殖循环水控制系统设计

目录

摘要 ____________________________________________________________________________________________ I

Abstract __________________________________________________________________________ II

第一章绪论 ______________________________________________________________________________________ 1

1.1利用PLC设计工厂化养殖循环水控制系统的目的 _____________________________________________ 1 1.2利用PLC设计工厂化养殖循环水控制系统的意义 _____________________________________________ 1 1.3国内外研究现状 __________________________________________________________________________ 1 1.4 本文研究的主要内容 ____________________________________________________________________ 2

第二章工厂化养殖的概述 __________________________________________________________________________ 3

2.1工厂化养殖的发展历程 ____________________________________________________________________ 3 2.2工厂化养殖循环水控制系统的基本结构 ______________________________________________________ 4 2.3工厂化养殖的水质标准 ____________________________________________________________________ 4 2.4工厂化养殖的发展趋势 ____________________________________________________________________ 5 2.5本章小结 ________________________________________________________________________________ 5

第三章控制系统的方案设计 ________________________________________________________________________ 6

3.1控制系统设计的步骤 ______________________________________________________________________ 6 3.2控制系统设计的方案 ______________________________________________________________________ 6 3.3控制系统的原理图 ________________________________________________________________________ 6 3.4控制系统的工艺流程图 ____________________________________________________________________ 7 3.5本章小结 ________________________________________________________________________________ 7

第四章控制系统的硬件设计 ________________________________________________________________________ 8

4.1可编程控制系统与继电控制比较 ____________________________________________________________ 8

4.1.1 继电器控制的优点和缺点 _________________________________________________________ 8 4.1.2 可编程控制器控制的优点 _______________________________________________________________ 8 4.2PLC设备选型 ____________________________________________________________________________ 8

4.2.1 PLC选型原则 _____________________________________________________________________ 8 4.2.2 PLC 机型的选择 __________________________________________________________________ 9 4.3变频器的选择 _____________________________________________________________________________ 9 4.4 水位传感器的选择及 PID算法设计 _______________________________________________________ 10

4.4.1 水位传感器的选择 _______________________________________________________________ 10 4.4.2 水位PID算法设计 _______________________________________________________________ 10 4.5 消毒方法的比较及选择 __________________________________________________________________ 11 4.6 溶解氧传感器的选择及 PID控制参数的设定 ________________________________________________ 12 4.7固体废物去除设备的选择 __________________________________________________________________ 13 4.8输入/输出点数分配 _______________________________________________________________________ 14

4.8.1 输入/输出点数的估算 ____________________________________________________________ 14 4.8.2 输入/输出分配表 _________________________________________________________________ 14 4.9本章小结 _______________________________________________________________________________ 15

第五章控制系统的软件设计 _______________________________________________________________________ 16

5.1可编程控制器的编程语言 _________________________________________________________________ 16

5.1.1 STEP 7 简述 ____________________________________________________________________ 16

5.1.2 PLC 程序设计的常用方法 _________________________________________________________ 16 5.2程序说明 _______________________________________________________________________________ 仃 5.4本章小结 _______________________________________________________________________________ 仃

结论 ___________________________________________________________________________________________ 18 致谢 ___________________________________________________________________________________________ 19 参考文献 _______________________________________________________________________________________ 19