Fibre laser methane sensor and its application in coal mine safety

Using the technology of tuneable diode laser absorption spectroscopy and the technology of microelectronics, a fibre laser methane sensor based on C8051F410 was given. We used the DFB Laser as the light source of the sensor. By tuning temperature and driver current of the DFB laser, we could scan the laser over the methane absorption line, we realised the methane detection. It made the real-time and online detection of methane concentration to be true, and it had the advantages just as high accuracy, immunity to other gases, long calibration cycle and so on. The sensor had the function of self-diagnose, the soft would alarm when the probe in a fault status, then it improve the dependence of the measurements. In coalmine safety, the proportion of gas accidents are improving continuously, Since for the coalmine safety, the personnel safety and the environment protection, it was very important to realise the real-time online detection of methane in coal mine. In this paper, some data that coming from the application of sensor in the field of coal mine is given. And we also do some analysis of the data. The authors concluded by listing some problems and the direction of further improvements.

Authors: Li, Yan-fang; Wei, Yu-bin; Ying, Shang; Zhao, Yan-jie; Zhang, Ting-ting; Wang, Chang; Liu, Tong-yu. ;Full Source: Procedia Engineering [fusion_builder_container hundred_percent=”yes” overflow=”visible”][fusion_builder_row][fusion_builder_column type=”1_1″ background_position=”left top” background_color=”” border_size=”” border_color=”” border_style=”solid” spacing=”yes” background_image=”” background_repeat=”no-repeat” padding=”” margin_top=”0px” margin_bottom=”0px” class=”” id=”” animation_type=”” animation_speed=”0.3″ animation_direction=”left” hide_on_mobile=”no” center_content=”no” min_height=”none”][online computer file] 2011, 26, 1200-1204 (Eng) ;