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设计了一种基于西门子S7-300系列PLC的矿井主通风机在线监控系统,系统采用了具备高抗干扰性、高可靠性、适用于工业环境现场的控制器以及传感器,保证系统的监测值以及风机控制指令在电磁干扰严重的通风机房中可靠的传输;通过伯努利方程计算得到主通风机的排风量,避免由于风筒截面风流量不均引起的计算偏差。
A mine main fan on-line monitoring system based on Siemens S7-300 series PLC was designed. The system adopted the controller and sensor with high anti-interference and high reliability, suitable for industrial environment and ensured the monitoring value of the system. Fan control instructions in the serious electromagnetic interference ventilator room reliable transmission; calculated by Bernoulli equation of the main fan exhaust volume, to avoid the uneven section of the wind flow caused by the calculation of the error.