煤矿电气安全监测系统设计word版

煤矿电气安全监测系统设计

学生姓名：

学生学号：

院（系）：电气信息工程学院

年级专业：

指导教师：

二〇一五年五月

摘要

伴随着我国经济的日益繁荣，各个行业对资源的需求也多了起来，但这也使得矿难事故的的增多，对煤矿安全也产生了巨大的挑战。新中国成立以后，收到国外的影响越来越多，而在人民生命财产方面，国家也特别的重视，为了更好的保护人民的生命财产，就更需要好的财产保护设计。

本次设计瓦斯监测系统，主要分两部分来解决该问题：一是瓦斯的监测，二是系统的报警。文中首先阐述了CH4监测系统的发展及状况，其次着重介绍了我们此次基于瓦斯传感器MQ-5和单片机AT89C52的煤矿瓦斯监测报警器。本设计包含了瓦斯浓度的采集，A/D的转换，AT89S51单片机，LED数据显示，串口通讯及按键控制电路，动态显示及浓度控制等。在原件选择中，在达到实验目的的同时，也要尽可能减少实验成本。

本设计实现了对瓦斯浓度的实时监控，一旦达到设定的阀值，将进行声光系统的报警。设计出来的装置，便宜实用，显示直观，抗干扰能力强等优点，对在环境恶劣的井下作业现场十分受用。既然能在恶劣的环境下使用，那么就可以更好的保护井下矿工的生命，为他们在生命中提供了一盏生命的保护灯。

关键字：瓦斯报警系统，单片机，瓦斯传感器

ABSTRACT

Along with the increasing prosperity of China's economy, various industries of resource demand is also more, but it also makes accidents increased, also produced a great challenge to the safety of coal mine. After the founding of new China, received more and more foreign influence, and in people's life and property, countries are also special attention, in order to better protect people's lives and property, the greater the need for good property protection design.

The design of the gas monitoring system, mainly divided into two parts to solve the problem: one is the monitoring of gas, the second is the alarm system. This paper first describes the development and status of CH4 monitoring system. Secondly, the author introduces the US based on the gas sensor MQ-5 and singlechip AT89C52 coal mine gas monitoring alarm. The design includes the gas concentration acquisition, A / D conversion, AT89S51 MCU, LED display, serial communication and a key control circuit, dynamic display and concentration control. In the original choice, to achieve the purpose of the experiment at the same time, also as far as possible to reduce the experiment cost.

The design and implementation of the real-time monitoring of gas concentration, once it reaches a set threshold, the sound and light alarm system. Design of device, cheap and practical, visual display, anti-interference ability strong, for in the harsh environment of underground working site very enjoyable. Since it can be used in harsh environment, you can better protect miners life, them in life offers a lamp life protection lamp.

Key words:Gas Alarm Systems ,SCM,Gas sensor

目录

摘要................................................................................................................................................... I ABSTRACT .........................................................................................................................................II 目录.. (1)

1 绪论 (3)

1.1 国内外现状及意义 (3)

1.2课题的主要研究内容与要求 (3)

2 系统总体设计 (5)

2.1系统性能描述 (5)

2.2系统方案的选择 (5)

2.2.1系统设计方案 (5)

2.2.2传感器的选择 (6)

2.2.3单片机的选择 (10)

2.2.4 AD转换芯片选择 (12)

3 系统的硬件设计 (15)

3.1 硬件系统功能设计 (15)

3.2各模块仿真原理图及工作原理 (15)

3.2.1信号采集电路 (15)

3.2.2单片机最小系统电路 (16)

3.2.3声光报警电路 (17)

3.2.4液晶显示电路 (18)

3.2.5串口通信电路 (20)

4 软件设计 (21)

4.1 软件设计方法 (21)

4.2 软件实现功能 (21)

4.3 报警部分设计 (22)

5 仿真设计及结果分析 (23)

5.1 仿真系统原理 (23)

5.2 仿真系统调试过程 (23)

5.2.1仿真系统静态时 (23)

5.2.2仿真系统设置阀值的状态 (24)

5.2.3仿真系统动态时 (25)

6 PCB设计 (27)

6.1 PCB设计软件 (27)

6.1.1 PCB原理图设计 (27)

6.1.2 PCB板制作方法 (27)

6.2 PCB的EMC设计 (28)

6.2.1 元器件布局的基本原则 (28)

6.2.2 布线设计原则 (29)

6.3 印制电路板 (29)