Title :
Multi-Channel Optical Fiber Methane Monitoring System Based on Laser Absorption Spectroscopy
Author :
Zhao, Yanjie ; Wei, Yubin ; Li, Yanfang ; Zhang, Tingting ; Shang, Ying ; Wang, Chang ; Liu, Tongyu ; Yu, Qing
Author_Institution :
Laser Inst., Shandong Acad. of Sci., Jian, China
Abstract :
A multi-channel optical fiber methane monitoring system is researched for detecting the concentration of methane gas. In this system, distributed feedback laser is employed as light source. The narrow absorption line of the laser could effectively eliminates the cross sensitivity to moisture, ethane or other gases. 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. The results show that the monitoring system has a great application in the comprehensive utilization of coalmine methane and ventilation air methane.
Keywords :
coal; distributed feedback lasers; fibre optic sensors; gas sensors; light absorption; light sources; measurement by laser beam; mining; moisture; absorption line; coal mines; coalmine methane; distributed feedback laser; electrical components; hazard environment; laser absorption spectroscopy; light source; methane gas concentration detection; moisture; multi-channel optical fiber methane monitoring system; sensor head; ventilation air methane; Absorption; Distributed feedback devices; Fiber lasers; Gas lasers; Monitoring; Optical fiber sensors; Optical fibers;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6306934
