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为解决瓦斯爆炸感应期内探测技术中探测对象特征问题,采用小尺度实验和光谱分析的方法,分析了12个浓度的51组瓦斯爆炸实验光谱数据.结果表明:瓦斯爆炸感应期内火焰发射光谱中,CO的Fourtb Positive谱带,NO的γ谱带,H2O的谱带,O2的Atmospberic谱带出现频率较高,被探测到的概率较大,适宜作为辨识瓦斯爆炸信号的特征光谱,CO2特征光谱被探测到的概率偏小.瓦斯爆炸感应期内爆炸过程中CO、NO含量在瓦斯化学当量浓度附近时最小,H2O含量在瓦斯化学当量浓度附近时最大,O2含量与瓦斯浓度相关性较弱.实验条件下各分子出现10次以上的特征光谱中CO的Fourtb Positive谱带光谱强度随着波长的增加而减小,在208 nm处相对最强;NO的γ谱带在285 nm、258 nm处、H2O在966 nm、933 nm、590 nm处、O2的Atmospberic谱带在768 nm处相对较强.研究结果为瓦斯爆炸感应期内探测与抑爆技术提供理论依据和数据支持.
In order to solve the problem of detecting objects in the detection technology of gas explosion during the induction period, small-scale experiments and spectral analysis methods were used to analyze the gas spectral data of 51 groups of gas explosions at 12 concentrations.The results showed that the flame emission spectrum , The Fourtb Positive CO band, the γ band of NO, the band of H2O and the band of O2 have a higher frequency of detection and a higher probability of detection, which is suitable for the identification of the characteristic spectrum of gas explosion signal, CO2 characteristics The probability of detection of the spectrum is small.The CO, NO content in the explosion process during the gas explosion induction period is the minimum in the vicinity of the gas equivalent concentration, the H2O content is the maximum near the gas equivalent concentration, and the O2 content is weakly correlated with the gas concentration Under the experimental conditions, the Fourtb Positive spectra of CO in the characteristic spectra of each molecule showed a decrease with increasing wavelength, which was the strongest at 208 nm. The γ band of NO at 285 nm and 258 nm , The Atmospheric band of O2 is relatively strong at 768 nm at 966 nm, 933 nm and 590 nm.The results provide the theoretical basis and the theoretical basis for detecting and suppressing explosion in the gas explosion induction period stand by.