WebGIS-based Design And Implementation Of Mine Gas Monitoring

With the rapid development of Internet technology,GIS platform has been gradually shifting the network,WebGIS is a GIS Internet and WWW technology in the development of products,from any Internet node,the user can browse the WebGIS site spatial data,for various Spatial information retrieval and spatial analysis.This thesis is based on the WebGIS platform monitoring mine gas.Mine gas monitoring system consists of three parts,based on the WebGIS mine accident monitoring and warning,CAN bus and gateway network transmission research,data collection and staff positions information collected.Main research topics from three main components of the system to start.(1)Based on WebGIS platform of Mine Monitoring and Control Software Mine Monitoring database field design;UDP communication protocol based on real-time updates to monitor the database system;mine monitoring WebGIS ArcGIS-based design and implementation.(2)Under the Communications Research MineAs a controller with a microcontroller,reading up from the serial data (temperature,gas density and fan speed,etc.)through the CAN sent to the CAN bus communication interface up at the same time be able to come to the CAN bus to receive control commands through the serial port to the fan control system,control the fan start and stop;access through the gateway,after integration,CAN bus and the gateway to communicate through the CAN protocol,while in Ethrenet end IP network gateway and the control terminal or a GIS server using a uniform standard The TCP/IP protocol interaction information,through the application layer control platform and on-site instructions and data between devices interact.(3)Data collection and staff positions information collectionThe concentration of methane gas collection and field temperature data,and record the time when the data acquisition and realize the concentration limit alarm and data upload;fan start and stop the fan speed measurement and control,measuring fan speed,real-time monitoring of fan operation status to ensure the normal operation of the fan to avoid the fan does not turn too fast or too slow speed caused by a variety of industrial accidents,and realize remote automatic start and stop the fan control;project completion data on the RFID card reader;and to read to the RFID data,such as real time data transmitted to the host computer via CAN achieve the positioning and tracking of personnel.The main results:the Internet as a platform,Web and GIS as a means of object-oriented software engineering ideas to guide the WebGIS-based coal mine gas accident monitoring and warning system,also uses RFID(Radio Frequency Identification) technology,the use of active RFID card reader card reader to make greater distance,misunderstanding,and missed the chance to read very low,by the environmental impact of mining under the staff position,in order to ensure timely response When accidents search and rescue staff,improve rescue efficiency. Applications with outstanding reliability,and flexibility of real-time CAN bus technology,making the collected data with higher security and reliability.With the embedded Ethernet technology,the successful development of CAN and Ethernet connectivity system,through instruction and data format conversion map to solve both Fieldbus and Ethernet direct communication between heterogeneous networks, shielding the difference between the two network protocols so that data can be transparently.And completed the target of this project to realize remote control and access to the GIS field of industrial control technology to achieve a visual surveillance of personnel,positioning for the future of mine safety warning technology laid the foundation.