摘要高产高消耗的煤炭行业，具有从业人员多，危险性高的特点。据统计，我国中小型煤矿发生的大部分瓦斯爆炸和有毒气体使人窒息的事故是由于对矿井内瓦斯浓度和有毒气体浓度监控力度不够而引起的。因此，设计出经济、高效、智能的煤矿安全监控系统是非常必要的。69233

本文首先介绍了煤矿安全监控技术在国外与国内的研究近况，分析了目前国内技术的不足之处。接着根据相关规程对本文的设计作了总体功能的分析，最后根据功能要求完成软硬件的设计。

本课题主要设计工作分为下位机和上位机设计。下位机是以STC12C5A08S2单片机为核心，借助甲烷浓度、CO浓度、氧气浓度、CO2浓度、温湿度、设备开停等智能矿用传感器采集环境参数和设备运行状态参数信息，通过RS-485总线与上位机进行通讯，发送采集信息，接收控制数据，经过DAC0832将控制数据转化成模拟量，借助变频器和设备断电器来实现通风机转速和设备开停的控制。上位机则是通过LabVIEW软件来实现被测参数的数据处理、数据记录和显示、控制和超限报警等功能。

该论文有图37幅，表1个，参考文献25篇。

毕业论文关键词：煤矿安全监控  STC12C5A08S2  RS-485  LabVIEW

The Design of Microcontroller-based Mine Safety Monitoring System

Abstract

High yield and high consumption of the coal industry has the characteristics of more employees and high risk. According to statistics, most of the gas explosion and the accidents of poisonous gas causing people to choke occurred in Chinese small coal mines are caused by the lack of monitoring of the concentration of gas and the concentration of poisonous gas in the mine. Therefore, it is very necessary to develop an economical, efficient and intelligent coal mine safety monitoring system.

This paper first introduces the research status of coal mine safety monitoring technology in foreign and domestic, and analyzes the shortcomings of the current domestic technology. Then according to the relevant rules of the design of this paper, it make an analysis of the overall function, and finally it completes the design of hardware and software according to the functional requirements.

The main design work of this paper is pided into the designs of lower computer and higher computer. STC12C5A08S2 microcontroller is taked as the core of the lower machine, using the methane concentration intelligent sensor, carbon monoxide intelligent sensor, oxygen intelligent sensor, carbon dioxide intelligent sensor, oxygen intelligent sensor, temperature intelligent sensor, humidity intelligent sensor, air volume sensor and equipment start and stop sensor to collect the environmental parameters and the running state of the equipment parameters information. MCU communicates with PC by RS-485, sends capturing information and receives the  data which are translated by DAC0832 into analog that can realizes changing the fan speed and controlling the equipment start and stop with the helps of frequency transformer and breaker. The host computer uses LabVIEW as the software to realize

these functions of measured data processing, displaying, controling and overheat alarming etc.

This paper has 37 figures, 1 tables, 25 references.

Key Words: Coal mine safety monitoring  STC12C5A08S2  RS-485  LabVIEW

目  录

摘  要 I

Abstract II

图清单 VI

表清单 VII

变量注释表 VII

1 绪论 1

1.1 课题研究背景及意义