煤矿井下水仓水位监控系统.doc

摘要
本文主要论述了一种煤矿井下水位监测系统的设计与实现。系统主要由控制电路和液晶显示器组成,控制柜安装在井下水仓附近,外接多个传感器测量各项参数,控制电路以AT89C52单片机为核心,完成对被测信号的采集和处理等操作,当被测量超过允许值时,能够产生声光报警。电路板上配有键盘电路,当传感器初装或零点发生漂移时,可以通过按键调节零点,同时也可以设置每个被测量的报警值。液晶显示器实时显示现场模拟状态图,包括各个被测量的大小,并根据水位的高低有动态变化。
系统采集的信号主要包括水泵电机的电流值、开停状态和轴承温度值,以及水仓水位值。其中,采用WB系列电量隔离传感器来测量电流;采用KGT9矿用机电设备开停传感器来测量水泵电机的开停状态;采用数字温度传感器MAX6577测量水泵电机的温度;水位传感器为自行设计,探头采用MPM281压力传感器,根据压力与水位的关系,确定水位高度。系统采用彩色液晶显示器显示所有被测信息,如有报警可通过改变显示颜色予以提示。
软件部分采用C语言进行编程,对系统的各项功能进行了实验室调试和现场实验验证。整个系统对保证安全生产和提高生产效率起到了重要作用。
关键词:井下水位,实时监测,单片机,传感器,液晶显示器
Abstract
The essay mainly discusses a kind of design and reality of the water-bunker levelmonitoring system underground coal mine. The system prised by a control circuit andLCD. The controller is installed in the vicinity of the water-bunker, which linked a number ofsensors to measure the signalThe control circuit is in the core of AT89C52. pletes the measurement
gathering and processing. When the index is beyondthe limit, it will produce the acoustics-optics alarm. The PCB has the key circuit. When thesensors are installed at the first time or the zero value is changed, we can set the zero by thekey, also we can set the alarm value by the key. LCD display real time simulation of the scenestate graph including the size of all measurement, which has dynamic change in accordancewith the water level.
The signals that the system collects include the current, on-off state and the bearingtemperature of the pump engine and the water-bunker level. Among it, the measurement ofcurrent adopts WB series electric quantity isolation sensor. The measurement of on-off stateadopts KGT9 on-off sensor. The collecting of temperature is realized by the digitaltemperature sensor MAX6577. The water level sensor is designed by us with the MPM281pressing sensor as the probe to measure the water level according to the relationship betweenthe pressure and the water level. The system displays all the signals with color Liquid CrystalDisplay (LCD). If