煤矿废矿的自燃是在煤矿的主要灾难之一。察觉技术基于符号的气体是主要工具认识到煤矿废矿的自燃预言,并且乙烯气体是在煤的自燃的重要标志气体加速的氧化舞台。以便克服当前的煤乙烯察觉的问题,纸论述一个矿光纤维多点的乙烯集中传感器基于悦耳的二极管激光吸收光谱学。基于乙烯的在红外线附近的光谱的实验和分析,采用的系统联合的 1.62 m (DFB ) 波长纤维作为轻来源散布了反馈激光。由使用扫描技术并且发展中的波长,稳定的纤维长联合了 Herriot 类型路径气体吸收房间, ppm 水平高度为乙烯气体的集中的敏感检测系统被认识到,它能满足煤矿火预防废矿的需要预言。
Spontaneous combustion of the coal mine goaf is one of the main disasters in the coal mine. The detection technology based on symbolic gas is the main means to realize the spontaneous combustion prediction of the coal mine goaf, and ethylene gas is an important symbol gas of spontaneous combustion in the coal accelerated oxidation stage. In order to overcome the problem of current coal ethylene detection, the paper presents a mine optical fiber multi-point ethylene concentration sensor based on the tunable diode laser absorption spectroscopy. Based on the experiments and analysis of the near-infrared spectrum of ethylene, the system employed the 1.62 μm (DFB) wavelength fiber coupled distributed feedback laser as the light source. By using the wavelength scanning technique and developing a stable fiber coupled Herriot type long path gas absorption cell, a ppm-level high sensitivity detecting system for the concentration of ethylene gas was realized, which could meet the needs of coal mine fire prevention goaf prediction.