Application in coal mine of fiber methane monitoring system based on spectrum absorption
A novel all fiber optic multipoint methane monitoring system is researched for remotely detecting the concentration of methane gas in coal mines. A 1653nm distributed feedback (DFB) laser is used as the light source, by taking the triangular signal to modulate the light frequency of the DFB laser. The concentration of methane can be monitored and displayed on the screen. And the function of the sounding and light alarm bell and communication are achieved. Since the sensor head is made without any active electrical components, it is intrinsically safe when used in the hazard environment such as coal mines. With the use of a optical fiber links between monitor and sensor header, the system can provide a remote and online monitor/measurement information, which makes this system particular suitable for the safety monitoring in the coal mines. The monitor unit can connect to multi-sensors. The measurement range of each sensor can be selected according to the customers demand during 0-100％. The results show that the system has good performance in stability and sensitivity. It is an innovative total solution for coal mine safety monitoring and hazard warning.
Methane monitor Fiber optic sensor, Spectrum absorption Coal mine safety Tunable Diode Laser Absorption Spectroscopy
Yanjie Zhao Chang Wang Tongyu Liu Yanfang Li Yubin Wei Tingting Zhang Ying Shang
Laser Institute of Shandong Academy of Science, The Key Laboratory of Optical Fiber Sensing Technology of Shandong Province,Jian 250014, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
803-807
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）