摘要
作为一种广泛应用的化石能源,煤炭的在线监测非常必要。太赫兹技术是一种有效的在线检测方法,可作为传统技术的补充手段应用于煤炭的表征。基于9种煤炭标准试样的太赫兹时域光谱,计算了不同煤炭在0.1 THz^1.5 THz频段的折射率和吸收系数谱。将该频段内所有折射率和吸收系数数据作为输入变量,分别进行聚类分析,根据聚类结果,对应煤炭标准物质的已知参量,证明碳含量是影响煤炭折射率的主要因素,氢氮含量是影响吸收效应的主要因素。结果表明,太赫兹光谱结合聚类分析方法可对煤炭之间的相似性和相异性进行定性分析,为煤炭工业中的实时在线监测提供技术支持。
The on-line detection is necessary for the characterization of coal, a kind of fossil resource widely applied in industry. Terahertz(THz) spectroscopy is an efficient method for on-line determination and can act as the supplementary tool of the traditional methods in this field. The refractive index and absorption coefficient spectra of nine coal materials are initially calculated from 0.1 THz to 1.5 THz based on the terahertz time-domain spectra. Cluster Analysis(CA) is then employed with the input of refractive and absorption spectra over the whole range from 0.1 THz to 1.5 THz. According to the CA dendrogram and the tested physical properties of coals,a conclusion can be drawn that the carbon content is the main factor of refractive effect, and hydrogen as well as nitrogen play a key role in absorption,respectively. Therefore, the analysis of the similarity and diversity can be realized by THz technique combined with CA. This combination can support the constant and on-line monitoring in coal industry.
出处
《太赫兹科学与电子信息学报》
2016年第1期26-30,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
国家重大科学仪器开发专项基金资助项目(2012YQ140005)
国家自然科学基金资助项目(11574401
61405259)
关键词
煤炭
太赫兹光谱
光学参数
聚类分析
coal materials
THz spectroscopy
optical parameters
Cluster Analysis
