摘 要
为了保证煤矿井下运输系统的安全、高效、可靠运行，对井下皮带输送机进行自动控制对提高煤矿自动化管理水平具有重要意义。
本设计在分析皮带输送机集中控制系统功能基础上，以S7-300型PLC为核心构造了单条皮带和单台给煤机的自动控制系统。该系统由操作台和PLC组成，操作台用来后台管理和实时显示运行信息，PLC主要来完成现场信号的采集和实时控制。
本文首先介绍了皮带控制系统的构成和功能，分析皮带输送机常见故障类型及保护，确定控制系统的硬件结构并完成了设备选型，然后对系统进行软件设计；最后提出了皮带控制系统的抗干扰措施。
关键词：煤矿；皮带；控制；PLC
ABSTRACT
To ensure the operation in underground transport system reliable and safe in coal mine, it is very important to carry out automatic control of belt conveyor for raising the level of automatic management.
On the basis of analyzing centralized control function of belt conveyor,we design the automatic control system with the single belt and a single machine which based on S7-300 type PLC. The system is composed by the operation flat and the PLC, The operation flat is used to control flat and display running information real-time, and PLC is used to collect field information and control belt real-time.
In this paper, the composition and function of the belt control system is introduced firstly. Structure of hardware is confiremed and the equipment selection is also completed.Then the software design is conducted. At last,the anti-jamming measures of belt control system is represented.
Keywords：coal mine；belt conveyor；control；PLC
目 录
1绪论 .......................................................... 1
1.1概述 ...................................................... 1 1.2矿井皮带运输系统的意义 .................................... 1 1.3矿井皮带运输系统的控制要求 ................................ 2 1.4国内外的研究现状 .......................................... 3 1.5本设计的主要内容 .......................................... 4 2．控制系统的功能及设备选型 ..................................... 5
2.1 设备构成 .................................................. 5
2.1.1带式输送机 ........................................... 5
2.1.2故障检测及保护 ....................................... 5 2.2.3 CST软启动 .......................................... 12 2.1.4 人机界面HMI[18] .................................... 14 2.2控制系统功能 ............................................. 15
2.2.1起动流程 ............................................ 15 2.2.2停机流程 ............................................ 15 2.2.3皮带运输机之间联锁 .................................. 15 2.2.4皮带运输机与附属设备之间联锁 ........................ 15 2.2.5皮带运输线运行故障联锁及其处理 ...................... 16 3 基于PLC的皮带控制系统的硬件组态 ............................. 18 3.1PLC简介 .................................................. 18
3.1.1PLC组成 ............................................. 18 3.1.2PLC特点 ............................................. 19 3.1.3PLC应用领域 ......................................... 20 3.1.4PLC的基本工作原理 ................................... 21 3.2控制系统的总体结构 ....................................... 23 3.3控制系统的硬件组成 ....................................... 25
3.3.1控制系统I/O点数的确定 .............................. 26 3.3.2PLC的硬件配置 ....................................... 28 4基于PLC的皮带控制系统的软件设计 ............................. 34 4.1控制系统程序及工作方式 ................................... 34 4.2 系统软件实现 ............................................. 35
4.2.1 控制方式选择 ....................................... 35 4.2.2 各种常见故障的诊断 ................................. 37
4.3触摸屏的软件实现 ......................................... 40 4.3.1触摸屏简介 .......................................... 40
4.3.2触摸屏系统的设计 .................................... 41
5基于PLC的皮带控制系统的抗干扰措施 ........................... 44
5.1干扰和干扰源 ............................................. 44 5.2系统抗干扰措施 ........................................... 44 参考文献 ...................................................... 48 翻译部分 ...................................................... 50
英文原文 ..................................................... 50 中文译文 ..................................................... 59 致谢 .......................................................... 66