【作者】 高斌斌；

【导师】 贾敏智；

【作者基本信息】 太原理工大学 ， 控制工程， 2012， 硕士

【摘要】 伴随着贫油、少气的日益凸显,以及国际原油价格的不断攀升,煤炭在我国的能源主体地位日益巩固,因此对煤矿安全生产的研究也显得更为重要。据统计,在我国发生的矿难中,80%为瓦斯事故,因此对井下瓦斯的监测与控制成为煤矿生产的重中之重。在现有的瓦斯监控系统中,大多采用有线监控方式,而在井下工况条件十分恶劣的情况下,有线系统经常会产生通讯故障。随着近几年无线通讯的发展,有关井下无线监控系统的研究成为热点。但是通过查询有关的资料和论文,可以发现,现阶段这些研究内容大部分处于理论研究阶段,很少有付诸实施的。本文针对目前市场上存在的瓦斯监控系统,提出了一套基于ZigBee无线传输和组态软件的瓦斯监控系统。本系统根据高瓦斯矿井的特点,通过井下通风系统和瓦斯抽放系统来保证井下瓦斯含量不超标,同时通过数据采集模块,将各个位置的相关传感器数据汇总后发送到上位机监控系统中,监控系统通过组态软件对井下数据进行实时显示。井下通风系统由PLC、变频器、通风机及各种传感器组成。其中PLC用于综合系统中传感器传回来的数据,计算变频器的输出频率,通过控制变频器的频率实现对通风机的控制。考虑到工作面的实际情况,将变频器的控制分为自动和手动两种,为系统配备了两台变频器和两台通风机,以保证系统的运行瓦斯抽放系统包括PLC、变频器、水环式真空泵、循环水泵、冷却塔、通风机以及各种传感器组成。其中,水环式真空泵用于抽取瓦斯,为了保障水环式真空泵的运行,为其配备了循环水泵和冷却塔。因为在瓦斯抽放过程中,难免会有瓦斯泄露到泵房中,所以为泵房配备了通风机,在泵房瓦斯含量超标时,通过通风机将其排出,PLC用于对各种设备的启停进行自动控制。为了保证瓦斯抽放系统的正常工作,为其配备了两台水环式真空泵和两台循环水泵,二者互为备用。井下环境参数的实时采集通过各种传感器来实现,然后将其通过数据采集器RTU进行汇总,有效减少了数据传送多、杂、乱的问题。在数据传输中,采用了ZigBee设备进行无线通讯,它具有自组网、功耗低、通讯可靠等优点,而且支持透明传输,井下设备与上位机通过Modbus-RTU协议进行通讯。在上位机监控系统中,采用组态软件进行数据的实时显示和数据保存,同时对设备进行远程控制。通过Visual Basic程序和多画面显示,实现了对井下各个位置的实时监控。更多还原

【Abstract】 With the short board of deficient oil and lean gas have become more obvious, fast increase of international petroleum price, the coal’s energy subject position of China consolidates increasingly, so the research of coal mine safety production become more important. Statistics show that80%of our china’s coal accidents were gas accident, so the detection and control of mine gas become more and more important.Most of the existing gas monitoring system using wire, and the wire system often goes wrong by the very adverse work condition of mine. In recent years, the research of mine wireless monitoring system become popular with the development of wireless communications. By reading reference associated materials and books, we can find that most of these research contents in theoretical study and little in practice. Be aimed at the current gas monitoring system, this paper presents a gas monitoring system with wireless transmission of ZigBee and MCGS.According to the characteristics of high gas mine, this system using the ventilation system and gas drainage to ensure no limit exceeding of the gas content. And return the summary data from various sensors to upper computer monitoring system by using data collector. The monitoring system use MCGS to real time monitoring the underground data.The ventilation system include PLC^frequency converters> ventilation fan and various sensors. PLC used for calculate the frequency of frequency converters by synthesis the data return from sensors, and through the frequency converters to control the ventilation fan. Consider the actual situation of working surface, the control of frequency converters divided automatic and manual. In order to ensure the system operation, we provided with two frequency converters and ventilation fans.The gas drainage include PLC、frequency converters、Water-ring vacuum pump、Circulating water pump、Cooling tower、Ventilation fan and various sensors. The Water-ring vacuum pump used for gas drainage, In order to ensure the operation of Water-ring vacuum pump, provided with Circulating water pump and Cooling tower for them. In the process of gas drainage, the gas hard to avoid leak into pump room, so in the pump room we provided with a ventilation fan. When the gas of pump room was overranging of content, the gas will discharged by ventilation fan. And the PLC was using for start-stop the various types of equipment. In order to ensure the normal work of gas drainage, we provided with two Water-ring vacuum pumps and circulating water pump in this system, both equipment will be mutual standby.The environmental parameters of underground coal mine were obtained by various sensors. The much, random and miscellaneous were effectively reduced through RTU to summarize.In data transmission, the wireless communication can realize by using ZigBee equipment. ZigBee equipment has various advantages include ad hoc networks、low power dissipation and communications reliable and it can communicate by transparent transmission. The underground equipment and upper computer communicated by Modbus-RTU Protocol.In the upstream watch system, using conFig.uration software to achieve the real time display and save of the Downhole Data. The same time, through conFig.uration software to remote control the downhole equipments. Use the visual basic program and multi-picture show to realize the aims which can real-time monitoring the each position of underground.更多还原