Design Of Mine Roadway Water Conditions Monitoring System Based On Industrial Field Bus And Ethernet

With the deepening of coal mining,mine water flooding becomes more serious and poses a serious threat to the safety of coal mines.It is of vital importance to monitor and control the water conditions of mine bunkers to ensure coal mine production safety.At present,the automatic solution for monitoring and drainage control of coal mine main water tanks in China has matured.However,most monitoring systems,using explosion-proof PLC control boxes as the main control units whose entire equipment is bulky and the cost is high,cannot adapt to the trend of miniaturization of equipment integration.At the same time,for the monitoring and drainage control of decentralized roadways water tanks,many coal mining companiey still use manual inspections to control the start and stop of pumps and the control efficiency is low.Existing water level sensors show reliability defects in dirty water quality environments such as mine slime water.In addition,some monitoring solutions can only achieve the local monitoring of water conditions of mine roadway water tanks,failing to form an overall system capable of centralized monitoring of the water conditions of each mine roadway.In short,water conditions monitoring solution applied to mine roadways is not yet mature.This paper proposes a mine roadway water conditons monitoring system solution based on master-slave bus communication and Ethernet data interaction: using the strategy of embedded integrated redundancy development,the STM32F407ZGT6-based functional redundancy monitoring unit hardware miniaturization implementation scheme and the data communication scheme based on the standard 485 communication specification and the TCP/IP Ethernet information communication are determined.Aiming at the deficiency of the existing water level sensor in coal slime water application,a capacitive water level detection instrument based on digital capacitance conversion and suitable for the slime water environment was proposed and designed.The pump start-stop control and pump status monitoring of the monitoring system were analyzed.The subject has designed the hardware system of the mine roadway water condition master/slave monitoring unit with redundant functions,and the software development of the master and slave monitoring unit are completed.This paper mainly carries out research and design on the hardware implementation of isolation-driven sensing signal detection,output relay control,and onboard/remote input redundant detection.The hardware development of TFTLCD visualization module driven by FSMC interface and the memory circuit designs for reading/writing of water condition parameters and Chinese character firmware storage is completed,and isolated 485 interface and Ethernet interface circuits is designed.According to the demand of monitoring and data interaction required by the monitoring units of the master and slave,the master monitoring unit interactive control trigger signal input,polling slave station water data access,water condition parameter configuration,and interface display functions are completed.The slave monitoring unit software design realizes the bottom layer driving and monitoring application development of the functions such as sensor signal detection,control signal input/output,water condition data interface display,water condition parameter reading/writing,and data response.The mine roadway water conditions monitoring system based on industrial field bus and Ethernet meets the design goal of miniaturization of monitoring equipment on the basis of realizing the local automatic monitoring of the roadway water condition.With mine 485 communication line and Ethernet,the network monitoring of the mine roadway water conditions data can be realized.The designed capacitive water level sensor can be applied to the detection of water level parameters in the dirty and polluted water environment of mines,which greatly enhances the reliability of the monitoring system.The monitoring system effectively improves the monitoring and drainage control efficiency of the accumulated water in mine roadways,and enhances the digitization level of mine production,which is of great significance for safeguarding mine safety.