毕业设计（论文）-基于单片机的氧气浓度检测控制系统设计精选.doc

基于单片机的氧气浓度检测控制系统设计 摘 要 为了防止事故发生，保障矿工的健康和安全，促进生产发展，提高煤炭企业的经济效益，应对井下的气象进行检测，对可能造成灾害事故的各种有的害气体及矿尘进行及时而准确的检测和严格控制，一旦发生灾变，必须及时救护遇难人员和处理事故。所有这些都需要有相应的检测仪器和救护装备。 本文介绍了一种基于AT89S51单片机的便携式氧气浓度检测仪的设计与实现。电化学反应式氧化锆传感器首先将氧气浓度信号转变成电流信号，经调理放大后传送至单片机AT89S51，再经A/D转换后，进行串口输出和现场LED显示。采用嵌入式串/网口转换器将异步串行485通信信号转换成网络信号，通过局域网或互联网进行有线网络传输，以达到远程监测目的。本系统主要用于检测空气中的氧气浓度，并将检测数据进行本地和远程两种显示，与此同时还可对测量最大限远程设定，超限现场声音报警。通过管理软件实现历史数据的显示与检测。仪器测量电路具有通用性，配合不同气敏元件适当调节参数就可实现对气体的测量。 关键词:氧化锆；AT89S51单片机；ADC0809；报警 Oxygen Concentration Control System Design Based on SCM Abstract In order to prevent accidents, protect the health and safety of miners, to promote the development of production, improve the economic benefits of coal enterprises to deal with underground weather detection, timely and accurate on a variety of disasters may cause some harmful gas and mineral dust testing and strict control, in the event of disaster, ambulance personnel in distress and handling accident must be timely. All of these need to have the appropriate testing equipment and ambulance equipment. This paper introduces the Design and Implementation of 89S51 microcontroller - based portable oxygen concentration detector. The electrochemical reaction of oxygen sensor first oxygen concentration signal into a current signal conditioning zoom send to the microcontroller 89S51 , after A / D converter , serial output and on-site LED display . Embedded string / network port convert asynchronous serial 485 signals into the network signal, the cable network transmission via LAN or the Internet in order to achieve the remote monitoring purposes. This system is mainly used to detect airborne oxygen concentration, and test data for both local and remote display, while also measuring the maximum distance set, transfinite live audio alarm. Management software achieves the displaying and testing of historical data. The instrument measuring circuit is versatile, suitably adjust parameters can be achieved on the measurement of gas with different gas