摘要
为了精确监测瓦斯抽采系统密闭容器内工作介质的液位高度,设计了一种基于差压的矿用密闭液位传感器。传感器采用高精度的差压变送器作为液位检测元件,同时采用RS485总线与监控分站或DCS系统进行数据传输,显著提高了传感器的检测精度和抗干扰能力。通过对传感器的ib转ia电路、电流采集电路、通信电路、遥控电路、显示电路等硬件电路和传感器的软件流程、通信协议等进行设计,实现了对密闭容器液位的在线监测。现场应用表明,传感器在0~1 m内测量准确,测量精度高、抗干扰能力强。通过与监控系统联网,实现抽采系统密闭液位的在线监测,对提高瓦斯抽采系统的自动化、智能化水平具有重要意义。
In order to accurately monitor the liquid level of working medium in the closed container of gas extraction system,a mining closed liquid level sensor based on differential pressure was designed.The sensor adopts high-precision differential pressure transmitter as liquid level detection element,and RS485 bus was used for data transmission with monitoring substation or DCS system,which significantly improved the detection accuracy and anti-interference ability of the sensor.The on-line liquid level monitoring of closed container is realized by designing the hardware circuits such as ib to ia circuit,current acquisition circuit,communication circuit,remote control circuit and display circuit of the sensor,as well as the software flow and communication protocol of the sensor.The field application shows that the sensor has the advantages of accurate measurement,high measurement accuracy and strong anti-interference ability in the range of 0-1 m.Through networking with the monitoring system,it realizes the on-line monitoring of the closed liquid level of the gas extraction system,which is of great significance to improve the automation and intelligence level of the gas extraction system.
作者
王祖迅
Wang Zuxun(Chongqing Research Institute,China Coal Technology and Engineering Group,Chongqing 400039,China;State Key laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400039,China)
出处
《煤矿机械》
2022年第1期10-13,共4页
Coal Mine Machinery
基金
2019年重庆市技术创新与应用发展重点项目(cstc2019jscx-mbdxX0007)。
关键词
差压变送器
密闭液位
ia电源等级
电流采集
RS485通信
differential pressure transmitter
closed liquid level
ia power level
current acquisition
RS485 communication
