Reducing Quantitative Fluctuation of Laser-Induced Breakdown Spectroscopy by Kalman Filtering

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	Reducing Quantitative Fluctuation of Laser-Induced Breakdown Spectroscopy by Kalman Filtering
	Sun LX(孙兰香); Cong ZB(丛智博); Xin Y(辛勇); Qi LF(齐立峰); Li Y(李洋)
	2013
会议名称	2013 2nd International Conference on Measurement, Instrumentation and Automation
会议日期	April 23-24, 2013
会议地点	Guilin, China
关键词	Fluctuation Kalman Filter (KF) Laser-Induced Breakdown Spectroscopy Quantitative Analysis
页码	243-247
中文摘要	Laser-induced breakdown spectroscopy (LIBS) is excellent for its potential of online compositional analysis. Large signal fluctuation is the major obstacle of LIBS for quantitative analysis application. A kalman filtering method is proposed to estimate the elemental concentration and smooth the quantitative results. The system state model and the measurement model are deduced. The relation matrix between the measured values and system state is estimated based on calibration curve built on some standard samples, and the measurement noise matrix is estimated by the variance of multiple measurements of the spectral intensity. In order to make Kalman filter follow the changes of elemental concentration, the initial value of the covariance matrix of estimation error is reset as a certain rule. The experimental results show that the Kalman filtering method can greatly reduce the fluctuation of quantitative results and improve the measurement accuracy.
收录类别	EI ; CPCI（ISTP）
产权排序	1
会议录	Applied Mechanics and Materials
会议录出版者	Trans Tech Publications Ltd
会议录出版地	Zurich-Durnten, Switzerland
语种	英语
WOS记录号	WOS:000329080300044
内容类型	会议论文
源URL	[http://ir.sia.cn/handle/173321/12430]
专题	沈阳自动化研究所_工业控制网络与系统研究室
推荐引用方式 GB/T 7714	Sun LX,Cong ZB,Xin Y,et al. Reducing Quantitative Fluctuation of Laser-Induced Breakdown Spectroscopy by Kalman Filtering[C]. 见:2013 2nd International Conference on Measurement, Instrumentation and Automation. Guilin, China. April 23-24, 2013.