The Application Of The CAN Industrial Bus And Based On The WCDMA Wireless Transmission Technology In The Coal Mine Safety Monitoring System

In recent years, coal mine safety monitoring system communication based the RS485transmission, the transmission medium is electric or optical fiber cables. With the development of the industrial bus system and the the WCDMA wireless transmission technology, the paper summarizes the research of coal mine safety monitoring technology for Chinese mine using signal transmission method based on the CAN bus technology which using CANopen communication protocol and the WCDMA wireless transmission technology, and the design of the monitoring system, the system has collected down hole sensors and mechanical running condition function.The transmission which from Ground to underground has using CAN intelligent node by CAN bus design, the paper has using micro controller LPC11C22no net transfer of vibration acceleration sensor and gas sensor conditioning circuitry and AD conversion circuit is designed, it is mainly to achieve down hole data acquisition and use of the CAN bus transmission function, CAN intelligent nodes with signal acquisition card, also offers RS232serial port, output port connected with the field instruments, field instrumentation signals via CAN bus network transmission to Inoue dispatch room.Dispatch room of the central station and mine each monitoring sub-station communication between the dispatch room, design transfer rate for the uplink and downlink384Kbps and supports penta-band850/900/1800/1900/2100MHz the SIMCOM SIM5216E3G WCDMA of industrial communication module to build Inoue wireless transmission network control center the point mine the various types of multiple remote data acquisition, monitoring and control.