基于PIC16F1937单片机的矿井便携式甲烷浓度测定仪.doc

PAGE PAGE 42 摘 要 随着我国经济的快速发展，各行各业对煤炭的需求急剧增加，而各种矿难事故的发生，使得煤炭安全生产面临严峻的挑战。这篇文章就是针对导致矿难频发的瓦斯浓度进行监控而设计的。 本文设计了一种基于PIC16F1937单片机的矿井便携式甲烷浓度测定仪，采用了高性能运算放大电路来对小信号进行放大的操作，由PIC16F1937单片机来完成对信号的采集以及处理，除了能够显示测量的浓度、发出声光报警信号的基本功能以外，而且还具有显示时间以及显示温度等的功能，采用了LED数码管能够实时地显示甲烷的浓度值，当被测气体中甲烷气体的浓度超过设定的数值的时候，将会发出声光报警的信号。本文所设计的智能型的便携式甲烷浓度检测仪在关键的部分应该采取防水防尘的措施。因为它是基于便携式地设计，尺寸比较小，所以它能够安装在煤矿工人随身携带的装备上来进行实时地测定甲烷气体的浓度。 本文首先引出了本课题的研究背景、研究现状以及现实选题的意义。其次分析和提出了系统总体的设计方案，接下来设计了基于PIC16F1937单片机的矿井便携式甲烷浓度测定仪的硬件电路，主要包括甲烷气体传感器、单片机处理和控制电路、显示电路、声光报警电路以及系统的电源电路等。然后设计了基于PIC16F1937单片机的矿井便携式甲烷浓度测定仪的软件程序以及进行了上位机的软件设计。本论文最后总结了所做的工作，并且介绍了基于PIC16F1937单片机的矿井便携式甲烷浓度测定仪的创新点以及未来发展的趋势。 关键词 甲烷浓度 便携 PIC单片机 测定仪 Abstract With Chinas rapid economic development, businesses surge in demand for coal, and a variety of mine accidents, making the safe production of coal is facing serious challenges. This article is aimed at frequent cause mine gas concentration monitoring and design. This design of a mine based on PIC16F1937 microcontroller portable methane detector, using a high-performance operational amplifier circuit to amplify the small signal operation, the PIC16F1937 microcontroller to complete the signal acquisition and processing, in addition to display the measured concentration , audible and visual alarm signals of the basic features, but also has shown time and temperature display function, using the LED digital tube display in real time the concentration of methane, methane gas when the measured gas concentration exceeds the set value when the alarm will sound and light signals. This article is designed intelligent portable methane detector in a critical part of the measures should be taken to water and dust. Because it is based on a portable design, size small, so it can be installed in coal miners carry equipment up for real-time determination of the concentration of methane gas. This paper raises the issue of the research background, research status and practical topics of significance. Second, analysis an