标题：Filtering algorithm research in trace C2H2detection based on TDLAS
作者：Wei, Yubin ;Liu, Tongyu ;Chang, Jun ;Zhang, Ting Ting ;Li, Yanfang
作者机构：[Wei, Yubin ;Liu, Tongyu ;Zhang, Ting Ting ;Li, Yanfang ] Laser Research Institute, Shandong Sciences Academy, Jinan; 250014, China;[Wei, Yubin ;Chang 更多
会议名称：16th International Conference on Optical Communications and Networks, ICOCN 2017
会议日期：August 7, 2017 - August 10, 2017
来源：ICOCN 2017 - 16th International Conference on Optical Communications and Networks
摘要：Real-time and accurate detection of the flammable gas concentration is the key issue in spontaneous combustion prediction. A modified tunable diode laser absorption spectroscopy (TDLAS) technology has been used in this paper to achieve in-situ detection of trace Acetylene concentration. Noises and interference fringes are eliminated by wavelet adaptive threshold filtering, and then Kalman filtering has been used to smooth the estimated gas concentration. It is demonstrated that the sensitivity is improved from 2 to 0.5 ppm by wavelet denoising and Kalman filtering. The fluctuation of estimated concentration can be suppressed to 1/4 of the original value.
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